Choosing the right rooftop air conditioner for a travel trailer is harder than it looks, because almost every listing sells you a compressor and then leaves the ceiling assembly, the gasket, the thermostat and the wiring to you. We spent weeks reading owner feedback on iRV2, Keystone and Forest River forums alongside customer reviews for a dozen of the most common rooftop models, and this is the list we would actually shop from in 2026.
Short answer first: for most travel trailers under 32 feet, the best rv air conditioners for travel trailers are the 13,500 BTU class, and the Dometic Brisk II is the safest all-round buy. It is the only model in this roundup with a review count in the four figures, so we have far more long-term owner data on it than anything else here. If your trailer already runs a Dometic distribution box, the Brisk II drops straight into the pattern. You need more power, the Furrion Chill Cube 18K cools hardest, and the OutEquip 12V model is the only one here that runs without a shore connection.
A few ground rules before the picks. Travel trailer air conditioners are rated by BTU, and owners repeatedly confirm the twenty degree rule: a rooftop model can only pull the interior down roughly twenty degrees below the outside temperature on a hot afternoon. In 100 degree weather, a 13,500 BTU box in a well-insulated trailer might settle at 80 degrees inside. That is physics, not a faulty machine, and no product on this list changes it.
We also track what the box actually contains. Several models here arrive without an inside control panel or a ceiling plenum, which owners on the forums call the real cost trap. Every card below lists what is included, what is sold separately, and how heavy the model is before you climb a ladder.
One more note on the trailer itself: a good cover makes a measurable difference to how hard the AC has to work. Our guide to the best RV covers for travel trailers is worth a look before the season starts.
Table of Contents
Top 3 Picks for Travel Trailers in 2026
All 12 Travel Trailer Rooftop ACs Compared in 2026
This table lists every model we cover, in the order we cover them. The Editor’s Choice sits at the top because it pairs the largest owner base in the roundup with a rating that holds up over many seasons.
| Product | Specifications | Action |
|---|---|---|
 Dometic Brisk II 13,500 BTU |
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 Coleman Mach 3+ 13,500 BTU |
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 ASA Advent ACM135 13,500 BTU |
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 RecPro RP-AC3800 15K Heat Pump |
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 RecPro RP-AC3501 13,500 BTU |
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 Furrion Chill Cube 18K |
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 OutEquip 12V 10,000 BTU |
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 Dometic Penguin II 13,500 BTU |
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 TOSOT 16,000 BTU |
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 Dometic FreshJet 3 15K |
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 Coleman-Mach 15 Plus 15,000 BTU |
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Check Latest Price |
 TURBRO Inverter 13,500 BTU |
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Check Latest Price |
1. Dometic Brisk II 13500 BTU – the all-round rooftop pick
Dometic B57915.XX1C0 Brisk II Polar White Air Conditioner (13,500 BTU 410A)
13500 BTU
72 lb
SEER 14.5
115V at 2800 watts
Pros
- Strong cooling that holds up in full sun
- Quiet for a 13500 BTU rooftop box
- Installs cleanly for most DIY owners
- Dampening brackets cut vibration
- Works ducted or non-ducted
Cons
- Inside control panel sold separately
- Panel housing described as plasticky
- 72 lb needs two people on the roof
The Brisk II is the model most travel trailer owners end up with, and that is not an accident. At 13,500 BTU it lands right in the sweet spot for trailers under about 32 feet, and at 115 volts and 2800 watts it will run on a 30 amp service comfortably once a soft start is fitted.
What stands out in the review data is consistency rather than excitement. Owners report strong cooling in direct sun even in larger trailers, and the dampening brackets genuinely reduce the metallic vibration that makes cheaper rooftop boxes rattle in the ceiling. Installation is described as straightforward for people who have done it before.
The specifications are solid on paper too. It measures 27.8 inches deep by 29.8 inches wide by 13.9 inches tall, uses R410A refrigerant, and carries a SEER of 14.5, which is at the good end of this group. The warranty is a two year Protection Plus plan.
The catch is the inside control panel, which is not in the box. You will need Dometic’s ceiling control kit or an equivalent before the rooftop box does anything, and reviewers describe that housing as thin plastic that cracks easily. A minority of buyers also reported sealed system failures within the first year and a warranty process that routed them to third-party repair centers rather than the brand.
Who the Brisk II suits
This is the right pick if you want the most proven rooftop option available and you are comfortable buying the thermostat separately. It is the safest bet for a first replacement because there are decades of owner history behind the platform, and on the iRV2 and Forest River forums the Coleman and Dometic platforms come up again and again as the two that keep working year after year.
If you already own a Dometic air distribution box, this is close to a plug-in job, which cuts your install time and cost dramatically compared with swapping brands.
Where it falls short
At 72 pounds it is a two-person roof job, and solo installers on the forums warn against lifting it alone. It is also not the quietest option in this list, so if you are a light sleeper in a small trailer, a lower-decibel model may serve you better.
The sold-separately control panel is the most common complaint in the reviews, and it is the item most first-time buyers forget to include in the plan.
2. Coleman Mach 3+ 13500 BTU – the value workhorse
Coleman 48203C966 Mach 3+ A/C Unit
13500 BTU
320 CFM
5600 BTU heat element
13.1 amps
Pros
- Proven long service life with 20 year old replacements
- Plug-and-play wiring on replacement installs
- 13.1 amps high-cooling draw is gentle on 30 amp service
- 13500 BTU suits small and mid-size trailers
Cons
- Louder compressor and fan than most models here
- Plastic housing feels dated
- Thin unpadded container in the box
The Mach 3+ is the model our forums research kept turning up as the value answer, and the reason is durability rather than polish. Multiple owners in the reviews describe replacing rooftop boxes of this type that were already more than twenty years old, which tells you something about how well the platform holds up.
On paper it is a straightforward 13,500 BTU rooftop box with a rotary scroll compressor, R410A refrigerant, 320 CFM of airflow, and a 5,600 BTU electric heat element you can add for shoulder season comfort. It draws 13.1 amps in high cooling and carries a SEER of 13.1.
Where it separates from the field is installation. The wiring pattern is a known quantity and reviewers describe replacement installs as close to plug-and-play, which matters if you are doing the roof work yourself for the first time.
Noise is the honest downside. Owners regularly describe the compressor and fan as loud, and several note that in a small trailer the sound is noticeable at night. The housing is a dated plastic design that feels thin in the hand, and a few buyers received models with shipping damage or internal debris because the container is a thin, unpadded box.
Who the Mach 3+ suits
Pick this one if your priority is getting a proven 13,500 BTU model onto the roof and you are not sleeping directly under it. It is a sensible match for smaller travel trailers and Class C rigs where the load is modest.
It is also a strong candidate for a first-time owner who wants a mechanical job rather than a technology project, because everything about the wiring and the roof cutout is already well known.
Where it falls short
If quiet operation matters to you, look elsewhere. The 13,500 BTU peers on this list with published noise figures run noticeably quieter, and the Dometic Brisk II is described as quiet by comparison.
The Coleman Mach 3+ also sits at a taller 16 inch profile rather than a slim low-profile design, and buyers report packaging that is thinner than it should be, so inspect the box carefully as soon as it arrives.
3. ASA Advent ACM135 13500 BTU – the clean direct swap
ASA Electronics ACM135 Advent Air 13,500 BTU Roof Top AC, White
13500 BTU
68.4 lb
3000 watts
14.25 inch roof vent
Pros
- Metal base pan resists leaks
- Quiet against the rooftop boxes it replaces
- Three fan speeds
- Exact fit for a 14.25 inch vent opening
Cons
- Included screws reported too short for some roofs
- Control box sold separately
- A minority of boxes cool weakly
The Advent is the answer when you want to replace an older Dometic or Coleman upper rooftop box without changing anything else. It fits the standard 14.25 by 14.25 inch roof vent opening, and reviewers specifically call it an exact plug-in replacement for older Dometic upper units.
Build quality is a step up from most of the value tier. It has a rigid metal base pan, a thick watertight vent gasket backed by six dense foam support pads, and a washable filter. That gasket detail matters more than it sounds, because forum threads are full of owners chasing blow-by leaks around worn vent openings.
At 68.4 pounds and 25.6 by 33.46 by 15 inches, it is lighter than most of the 13,500 BTU models here, which makes the roof lift more manageable. Three fan speeds give you a low setting for sleeping, and a plug-in heat strip is available as an add-on if you camp in the shoulder season.
The complaints are consistent and small. The included mounting screws have been reported as too short for certain roof applications, so buy a longer set before you start. The non-ducted control box is sold separately and its quality varies from batch to batch. A minority of buyers report cooling weaker than expected, so read the reviews for the model you receive if you can.
Who the Advent suits
This is the pick for anyone doing a like-for-like replacement on an existing trailer, especially if the current rooftop box sits in a standard 14.25 inch opening. Nothing else in your trailer needs to change, which keeps the job short.
Owners report a season of continuous duty without incident, and the metal pan has not shown the leakage issues that plague lighter plastic housings. It is also a good match for Class C motorhomes and mid-size travel trailers that need quiet operation in a small space.
Where it falls short
You still need to buy the ceiling control box separately, so the complete cost is higher than the headline figure suggests. And if your roof opening is a non-standard 14 by 14 inch cut, you will be into adapter work rather than a clean drop-in.
The screw length issue is a genuine annoyance that costs you a hardware store trip before the install day.
4. RecPro RP-AC3800 15K with heat pump
RecPro RV 15K AC Heat Pump Ducted/Non-Ducted White 110-120V
15000 BTU
55.4 dB
1500 watts
plenum included
Pros
- Heat pump adds shoulder season heat
- Low amp draw suits generator and solar
- Remote plus LED touch panel
- Plenum included in the box
Cons
- Heavier than comparable rooftop models
- Fan keeps running after the compressor cycles
- Included ducting foam is thin
This RecPro is the one to look at if you want heating as well as cooling from a single rooftop box. It delivers 15,000 BTU of cooling with a built-in heat pump, which handles the 55 to 75 degree stretches of spring and fall when running the furnace is overkill.
The power story is the real differentiator. It is listed at 1,500 watts, which is unusually low for a 15,000 BTU rooftop model and makes it a much easier match for a small generator, a modest inverter, or a battery bank with solar. It uses copper coil construction and a UV-resistant, low-drag rooftop housing built for highway use.
Controls are where it feels modern. You get a wireless remote and an LED touch panel with cool, dry, fan, sleep and timer modes, and the exterior shroud and interior plenum are both in the box, which removes the most common surprise cost in this category.
Two things temper that. At 112 pounds it is one of the heavier models here, and a minority of owners report the fan continuing to run after the compressor cycles, which adds humidity in damp climates. The included ducting foam is also thinner than some RV roofs need, so pad your penetrations.
Who this RecPro suits
It fits campers who camp in three seasons rather than two, and who would rather not run a furnace to take the chill off in April. The low wattage also makes it a realistic option for boondockers running a modest solar and battery setup.
Because the plenum is included, this is a cleaner install than most of the field, which matters if you are paying someone else to do the roof work.
Where it falls short
The weight is a genuine problem for solo installers, and 112 pounds on a ladder is not a good idea. The post-compressor fan behavior matters more in humid regions than in dry desert camping, so check your local climate before choosing.
Its SEER of 10.27 is on the low side for this group, so it will pull more power over a long run than the SEER 14.5 models here.
5. RecPro RP-AC3501 13.5K – the quiet upgrade
RecPro 13.5K Non-Ducted RV Air Conditioner, White, Cooling Only
13500 BTU
59.7 dB
1300 watts
112 pounds
Pros
- Rated 4.5 by owners across 218 reviews
- Noticeably quieter than the boxes it replaces
- Installs in under two hours with pre-wired power
- 1300 watt draw suits 30 amp service
Cons
- Remote needs direct line of sight
- No wired thermostat option
- Fan adds humidity after the compressor stops
The RP-AC3501 holds a 4.5 average across 218 reviews, one of the strongest showings in the roundup, and the reason is consistent across them: it replaces something loud with something noticeably quieter. At 59.7 dB and 1,300 watts, it draws very little power for its 13,500 BTU rating.
That low draw makes it a genuinely good match for 30 amp service travel trailers, particularly with a soft start kit fitted. It runs on 115 volts, uses R410A refrigerant, and works in both ducted and non-ducted layouts with the interior plenum included in the box.
Owners describe a straightforward three-wire hookup and installs that often finish in under two hours where the power is already run. The wireless remote and LED touch panel offer cool, dry, fan, sleep and timer modes, and reviewers praise the fact that you can change the setting without getting out of bed.
The recurring drawbacks are minor but worth knowing. The remote needs to be pointed directly at the ceiling control panel, and there is no option to wire in a conventional thermostat, which rules it out if your trailer runs a hardwired control. As with the larger RecPro, some owners report the fan continuing after the compressor cuts out, which can add moisture in humid air.
Who this RecPro suits
This is our pick for a travel trailer under about 28 feet on a 30 amp service, especially if the existing rooftop box is loud. The combination of a 4.5 average, a low 1,300 watt draw and an included plenum makes it the most complete install package here.
It is also a good option for anyone upgrading a trailer that was built with a non-ducted layout and has no ceiling ducts to service, since the plenum can be mounted directly under the vent.
Where it falls short
No wired thermostat support is a real limitation on older trailers that already have a wall control wired into the ceiling, and at 112 pounds it needs the same planned lift as the larger RecPro.
While it is quieter than the rooftop boxes it replaces, it is not the quietest option in this roundup, and it is only modestly quieter than some older Coleman installations.
6. Furrion Chill Cube 18K – most cooling power
Furrion Chill Cube 18K Non-Ducted Rooftop RV AC, White, FACR18VS-SA-PS-AM
18000 BTU
50 dB
variable speed inverter
72.4 pounds
Pros
- Highest cooling output in the roundup
- Variable speed compressor runs smoothly
- 50 dB for that much power
- Battery saver mode helps off grid
Cons
- Ceiling distribution box sold separately
- Requires a new outdoor unit rather than reusing ductwork
The Chill Cube 18K is the most capable cooling in this roundup. At 18,000 BTU, or 1.5 tons, it is aimed at longer trailers, large fifth wheels and camper vans, and it ranks near the top of the RV Air Conditioners category for good reason.
What makes it interesting technically is the variable speed compressor. Instead of switching on and off, it ramps continuously, which means no abrupt start-up surge, no freeze-then-warm cycling, and a measured 50 dB despite the higher output. It carries a SEER of 14 and a battery saver mode for extended off-grid runtime.
It is also relatively light for what it does, at 72.4 pounds, and the housing is a low-profile aerodynamic design at 30.38 by 30 by 16.63 inches. Installation is described as a simple bolt-on job with a step-by-step guide.
The catch is the ceiling assembly. The air distribution box is not included and has to be bought separately, so the finished cost is higher than the rooftop box alone suggests. Owners also report that it wants a new outdoor unit rather than reusing existing ductwork, which pushes it toward new builds and ceiling remodels rather than a weekend swap.
Who the Chill Cube suits
Owners of trailers above about 30 feet with a separate bedroom, or anyone who genuinely cannot keep up with the heat in a poorly insulated or sun-baked rig, will find more headroom here than anywhere else on this list. The inverter ramp also makes it the gentlest option on a small generator.
If you are building a new trailer or redoing a ceiling, paying for the distribution assembly up front is a reasonable trade for the cooling and the noise floor.
Where it falls short
It is not a drop-in for most existing trailers. Swapping to it usually means a new ceiling assembly and possibly new ductwork, which turns a Saturday project into a longer one.
For campers under 25 feet, 18,000 BTU is more machine than the space needs, and the extra spend rarely buys a better experience than a well-sized 13,500 BTU model.
7. OutEquip 12V 10000 BTU – the boondocking pick
RV Air Conditioner, 12V 10000 BTU Rooftop Air Conditioner for RVs, Trucks, Vans, Campers, Tractor, Low Profile Quiet AC Unit(w/heater)
10000 BTU on 12V DC
40 dB
6.3 inch profile
45 pounds
Pros
- Runs on 12V DC with no inverter or generator
- Quietest model here at 40 dB
- Light enough for one person to lift
- Low profile suits clearance-sensitive roofs
Cons
- 10000 BTU is small for a full trailer
- 4500 BTU heater handles mild weather only
- Wiring routes externally by default
This is the only rooftop model in the roundup that runs on 12 volt DC power, and for boondockers that changes the whole calculation. There is no generator, no shore connection and no inverter to size, which makes it the pick for campers running solar and battery banks.
At 10,000 BTU it is a smaller model than most of the travel trailer options here, and it is really aimed at camper vans, small campers and teardrop trailers. Reviewers do report fast cooling, with owners describing a significant drop in temperature within about fifteen minutes in a well-sealed van.
The build is the surprise. It runs at 40 dB, which is the lowest published noise figure among the models here, and it stands just 6.3 inches tall at 45 pounds, so a single person can lift it to a van roof. The housing is UV-stabilized ABS with an EPDM foam gasket, and the brushless copper fans are on spring-supported mounts.
There is a 4,500 BTU PTC heater included for mild conditions, plus a remote with eco, sleep and turbo modes. Be aware of two specifics: a current control board revision can overshoot the set temperature by as much as about eighteen degrees, and the wiring routes externally by default, which means an extra roof penetration unless you reroute it through the interior.
Who this rooftop box suits
It is built for van life, truck campers and small trailers where roof clearance is tight and off-grid time is the point. A 40 dB figure makes it workable in a sleeping space, which the bigger rooftop boxes in this roundup are not. If your trailer is really a van, our picks for the best window air conditioners cover the other side of that decision.
Customer support is also worth noting here, with reviewers mentioning responsive replies and free replacement control boards, which matters for a product line this new.
Where it falls short
Ten thousand BTU is not enough to cool a 30 foot travel trailer in summer heat, and the twenty degree rule still applies on top of that. The 4,500 BTU heater is a shoulder season supplement, not a cold weather heating system.
You will also need to plan the wiring route before installation to avoid a second roof penetration, and the temperature overshoot issue on current board revisions is worth checking on the model you receive.
8. Dometic Penguin II 13.5K – the low-profile pick
Dometic Penguin II High Efficiency, Low Profile Rooftop Air Conditioner, Ducted or Non-Ducted Application, 13.5K BTU, Polar White, Cool Only, No Pre-Installed Controls
13500 BTU
9.5 inch tall
99 pounds
low profile
Pros
- Slim 9.5 inch profile cuts drag
- EPP foam housing is lighter and efficient
- Good as a second box on a long fifth wheel
- Four bolt drop-in for older Dometic units
Cons
- Blower is noticeably noisy
- Controls sold separately
- Fan motor mounting design has quality issues
The Penguin II trades raw capability for a much smaller roof footprint. At 9.5 inches tall it is the slimmest 115 volt model in this roundup, and that low-drag shape is the reason owners buy it: less wind resistance on the highway and a better fuel number on long tows.
It is a 13,500 BTU cool-only rooftop box using R410A refrigerant, and it is rated at 3,956 watts. The EPP foam housing reduces weight and helps cooling efficiency, and it works in both ducted and non-ducted applications with Dometic CCC2 or CT thermostats, including multi-zone setups.
Owners most often install it as a second rooftop box to extend ducted cooling to the back of a long fifth wheel, which is a smart use of a second zone. It is also a four-bolt replacement for older Dometic upper units, and wiring into an existing inside control kit is described as simple.
It carries a 4.0 average, the lowest rating among the twelve models we covered, and the complaints explain why. The blower is noticeably noisy for a model this slim, controls are not included, and the instructions cover many similar models rather than this one specifically. There is also a documented quality control issue, with self-tapping fan motor screws that can back out and jam the fan, and one report of a rooftop box arriving with the fan motor not mounted at all.
Who the Penguin II suits
It is the sensible choice for anyone who cares more about tow-mileage fuel economy and roof clearance than on raw noise performance, and for owners of long trailers who want to add a second zone rather than replace what is already on the roof.
Existing Dometic owners get the easiest path here, since it wires into the control kit they already have and works with the thermostats already installed.
Where it falls short
At 99 pounds it is the heaviest 115 volt rooftop box here, which is a real problem for a part that is all about shaving weight off the roof. The fan screw issue deserves a physical inspection at delivery, because a jammed fan is an early failure.
At a 4.0 average it is the lowest rated product in this roundup, so it is the one we would think hardest about before recommending as a first purchase.
9. TOSOT 16000 BTU – the smart and quiet pick
TOSOT 16000 BTU RV Air Conditioner, 43dB Ultra Quiet, White
16000 BTU
43 dB
12,500 BTU heat pump
WiFi app
Pros
- 16000 BTU cooling in a rooftop box
- 43 dB is quieter than conversation
- 12500 BTU heat pump for spring and fall
- App control plus remote
- ETL certified with 2 year warranty
Cons
- Heaviest model here at 131 pounds
- Arrives in two separate packages
- SEER of 8.5 is low
TOSOT is the odd brand out in an industry dominated by three names, and that works in its favor on paper. This rooftop box puts out 16,000 BTU of cooling with a 12,500 BTU heat pump, and it is rated at 43 dB, which is quieter than a normal conversation at the same distance.
It is also one of the most connected models in the roundup. It is WiFi ready through the Gree+ app with an included remote, and it operates from 23 to 115 degrees ambient, so it keeps working when the trailer is cold in the morning and hot in the afternoon.
The installation side is friendly. It is a non-ducted design that fits the standard 14.25 by 14.25 inch rooftop vent opening, so it drops into an existing cutout, and the manufacturer lists it as suitable for travel trailers from 16 to 24 feet as well as Class B, Class C and teardrop campers. It carries a two year warranty and is ETL certified.
Weight is the standout drawback at 131 pounds, the heaviest model we looked at, and it arrives in two separate packages so both need to be on site before you start. That packaging detail is the one to plan around, along with the roof lift.
Who the TOSOT suits
This is the pick for owners who want app control and near-silent running in a mid-size trailer without stepping up to a 15,000 BTU compressor’s noise. The heat pump adds genuine value for three-season campers.
It is also a reasonable option for anyone who finds the three established rooftop brands thin at a particular size, since this is one of the few models in the 16,000 BTU range that fits a standard vent opening.
Where it falls short
Nobody should be lifting 131 pounds onto a trailer roof alone, and that alone rules it out for a lot of owners. Plan the lift properly or budget for help.
That low efficiency rating and the two package delivery also make it less convenient than a single-box model with a stronger SEER, and 16,000 BTU is oversized for trailers under about 25 feet. The listed floor area of 600 square feet is also modest for the BTU rating.
10. Dometic FreshJet 3 15K – the light Dometic upgrade
Dometic FreshJet 3 Series, 15K BTU RV Rooftop Air Conditioner unit, White
15000 BTU
65.3 pounds
SEER 13
58.5 dB
Pros
- Lightest 115V rooftop model in this roundup
- Backwards compatible with existing Dometic ADB
- E-coated coils resist corrosion
- 15000 BTU suits mid-size trailers
Cons
- 58.5 dB is louder than most models here
- Highest share of one-star reviews among Dometic models
- Listed energy consumption is high
The FreshJet 3 is the practical Dometic option. It delivers 15,000 BTU, which steps up from the 13,500 BTU Brisk II, and at 65.3 pounds it is the lightest 115 volt rooftop model in this roundup, which matters a lot for anyone working alone on a roof.
The compatibility story is excellent for existing Dometic owners. It is backwards compatible with existing Dometic air distribution boxes, so an upgrade does not require replacing the ceiling assembly. It also uses E-coated evaporator coils, which add real corrosion resistance in humid coastal camping and salty air.
On paper the rest is fine too. It is rated at 4,396 watts with a SEER of 13, uses a rotary scroll compressor and R410A refrigerant, and carries a two year warranty. It measures 29.5 by 27.56 by 13.99 inches, a compact footprint for its output.
The noise figure is the honest problem. At 58.5 dB it is among the loudest models here, and among the Dometic rooftop boxes it has the largest share of one-star reviews. The listed annual energy consumption is also high relative to the efficient models in this roundup.
Who the FreshJet 3 suits
This is the one we would recommend to a Dometic owner who wants more cooling power without touching the ceiling. The backwards compatible distribution box connection removes the most expensive part of a typical upgrade.
For solo installers, 65.3 pounds is a meaningful difference over 85 or 100 pound competitors, and combined with the compact dimensions it is one of the easier rooftop boxes to position on a curved roof.
Where it falls short
Do not buy it for a bedroom sleeper. At 58.5 dB it is audible in a quiet trailer, and the review data shows that is where the negative feedback comes from.
Owners who value efficiency will also note that its energy consumption figure runs high compared with the SEER 14.5 models in this roundup, so a longer trip on shore power will cost more to run.
11. Coleman-Mach 15 Plus 15000 BTU
Coleman-Mach 48204-069 Mach 15 Plus, 15,000 BTU A/C, Black, Wood Skid
15000 BTU
SEER 14.5
85 pounds
black finish
Pros
- Delivers genuine 15000 BTU output
- SEER 14.5 efficiency
- Plug-and-play install in about an hour
- Black finish is less visible
Cons
- Louder than newer inverter rooftop models
- 85 pounds needs a planned lift
- Some boxes arrive without the wood skid
The Mach 15 Plus is the model we would look at first for anyone who wants real 15,000 BTU output in the proven Coleman platform. One HVAC technician in the reviews measured a 30 degree suction-to-discharge differential on their install, which is the kind of concrete evidence most listings never provide.
Efficiency is a genuine strength here. The SEER of 14.5 is tied for the highest in this roundup, and combined with a rotary scroll compressor and R410A refrigerant it means less power per hour of cooling than most of the 15,000 BTU competition.
It is a medium profile rooftop box at 41 by 28.4 by 16.3 inches, finished in black, which is a nice touch for owners who do not want a white box as the most visible object on their trailer. It carries a two year warranty.
Owners describe plug-and-play replacement installs that take roughly an hour, and 85 pounds is light for its capacity class, though still a two-person lift. The recurring complaints are the usual category ones: it is louder than newer inverter models, and some buyers received a box where the advertised wood skid was replaced by thick cardboard, so check the contents as soon as it arrives.
Who the Mach 15 Plus suits
Trailers in the 30 to 32 foot range, and any camper with 50 amp service, are the natural match. Fifteen thousand BTU is the right step up from 13,500 for a trailer with a separate bedroom that needs cooling at the far end.
It also suits owners who want a black rooftop box for appearance, and anyone who has run a Coleman platform before and wants the wiring pattern to stay familiar.
Where it falls short
If your trailer runs 30 amp service, a 15,000 BTU rooftop box at 4,400 watts is where circuit breakers start tripping, and you will want a soft start kit. Owners on the forums treat that as standard practice rather than an accessory.
It is also louder than the inverter and variable speed models here, and a few buyers reported weak airflow and non-cold output on arrival, so test it the day it goes on the roof.
12. TURBRO Inverter 13.5K – the smart-start pick
TURBRO Inverter 13.5K BTU RV Air Conditioner with Cooling and Heat Pump
13500 BTU cool and heat
52 dB
inverter compressor
10 inch slim
Pros
- Inverter ramps up smoothly with no surge
- Measured draw near 1000 to 1500 watts
- Built-in soft start removes the need for an addon
- Works from 19.4 to 109.4 degrees
Cons
- Onboard sensor sits in cold return air and reads low
- No external thermostat option
- Remote and indoor interface feel janky
The TURBRO is an interesting machine because of what it does to compressor start-up. The inverter compressor ramps up gradually instead of kicking on at full load, which the manufacturer rates at up to 30 percent more efficient than a non-inverter system, and it has a built-in soft start ramp that removes the need for an external soft starter entirely.
Owners measuring real draw report staying near 1,000 to 1,500 watts, which is friendly to small inverter generators. It also resolves the freeze-then-warm cycling that owners complain about with older thermostats, and it provides 13,500 BTU of both cooling and heating plus fan and dry modes, operating from 19.4 to 109.4 degrees.
It is a slim 10 inch rooftop profile, rated as up to 35 percent slimmer than competitors, and it needs a 14.25 by 14.25 inch roof opening with ceiling thicknesses between 1.02 and 3.93 inches. The ceiling assembly has a blue, yellow or white atmosphere lamp, and it is WiFi enabled with app and remote control.
The dominant complaint is well documented and worth taking seriously. The built-in thermostat sensor sits in the cold return airflow path, so it reads well below actual room temperature and prevents the inverter from ramping down efficiently. There is no way to attach an external sensor to correct it, and several owners worked around the problem with Tuya-based automations. The remote and indoor interface also feel janky to a number of reviewers.
Who the TURBRO suits
It fits campers who are tired of their compressor slamming on and waking the whole trailer, and who run a small generator or a modest inverter that struggles with inrush current. The built-in soft start makes it a rare rooftop box that works on lighter power setups without an add-on kit.
It is also a clean drop-in for anyone replacing an existing 13,500 or 15,000 BTU rooftop box and wanting app control at the same time.
Where it falls short
The sensor placement is a real design flaw, not a preference, and it is the reason this model has the lowest average rating of the twelve. If you already run smart home automations you may be able to work around it, but otherwise expect the rooftop box to run colder than you set.
At 111.5 pounds it is also among the heaviest here, and the included ducting sponge is too thin for a standard five or six inch RV roof, so plan to add your own insulation.
How to Choose an RV Air Conditioner for a Travel Trailer?
Start with BTU, because it decides almost everything else. Travel trailer rooftop air conditioners come in three practical sizes: 10,000 BTU for vans and very small trailers, 13,500 BTU for the broad middle of the category, and 15,000 to 18,000 BTU for longer trailers and hotter climates. Owner consensus across the RV forums is consistent that 13,500 BTU is the sweet spot for trailers under 32 feet, which matches what the review data shows.
BTU sizing by travel trailer length
Use trailer length as a starting point, then adjust for climate and insulation. A small trailer in Arizona is a different problem from the same trailer in Maine.
Under 20 feet: 10,000 BTU is usually enough. The 12V models on this list live here.
20 to 28 feet: 13,500 BTU covers most cases. Non-ducted is fine with an open floor plan.
28 to 34 feet: 15,000 BTU, and consider ducted if the bedroom is far from the front rooftop box.
Above 34 feet or fifth wheels: 15,000 to 18,000 BTU, or a second rooftop model on a second zone.
Add heat pump capacity to the math if you camp in the shoulder season. It is not a furnace replacement, but 12,000 to 13,000 BTU of heat pump output comfortably handles the 55 to 75 degree range without burning propane.
Ducted or non-ducted: the decision that matters most
A ducted rooftop box blows cold air through hidden ceiling ducts to multiple registers, while a non-ducted one sends everything out of a single ceiling plenum. That is the whole difference, and it decides whether the back bedroom gets cold air.
Owners with 30 foot plus trailers and a separate bedroom consistently prefer ducted, because non-ducted layouts leave hot spots at the far end of the trailer. Trailers under about 25 to 30 feet with an open floor plan are generally fine non-ducted, and non-ducted is also far easier to retrofit.
One warning from the forums: check what is already in your ceiling before switching types. Owners who swapped a ducted system for a non-ducted one ended up with disconnected ceiling ducts and unfinished drywall, which is the subject of long threads on iRV2 about people regretting the change. Many models here, including the Brisk II, the RecPros and the Penguin II, work in both configurations.
Power draw, 30 amp service and the twenty degree rule
Most travel trailers are 30 amp, and a 13,500 BTU model is the safe fit there. Fifteen thousand BTU rooftop boxes draw around 4,400 watts, and running one on a 30 amp connection is the single most common cause of tripped breakers in the RV forums.
The fix owners recommend is a soft start kit. It ramps the compressor in over a few seconds so the generator or inverter does not see a hard inrush, and it is what allows larger models to run on lighter service. The TURBRO in this roundup has a soft start ramp built in, which is worth remembering if your service is marginal.
Also understand the twenty degree rule before you buy anything. A rooftop unit can only pull the interior to roughly twenty degrees below the outside temperature on a hot day. If it is 100 degrees outside, a perfect 15,000 BTU system gets you to about 80 inside, and no purchase changes that. Shade, window coverings and a reflective roof do more for you than a marginal upgrade.
If you run on solar or batteries, wattage matters as much as BTU. The RecPro 13.5K at 1,300 watts and the OutEquip 12V model are the two most efficient picks in this roundup. Pairing a rooftop air conditioner with the right generator is covered in our guide to the best portable generators for travel trailers.
What actually ships in the box
This is where budgets get broken. Several models here arrive without a ceiling plenum, without an inside control panel, or without a roof gasket, and the difference between the box price and the finished cost is often significant.
The RecPro RP-AC3800, the RecPro RP-AC3501 and the Coleman Mach 3+ are more complete out of the box. The Dometic Brisk II and Penguin II both require thermostat hardware. The Furrion Chill Cube requires its air distribution box bought separately, which is the largest gap of the twelve.
Also confirm the roof opening size. Most rooftop boxes fit a 14.25 by 14.25 inch vent, and a curved roof or a non-standard cut can add hours of fabrication work.
Weight and solo installation
Rooftop air conditioners are heavy, and the forum consensus is that anything over 60 pounds should not be lifted alone. In this roundup the lightest 115 volt model is the Dometic FreshJet 3 at 65.3 pounds, and the heaviest are the TOSOT at 131 pounds and the two RecPros at 112 pounds.
If you are working solo, weight should narrow your list before anything else does. Plan a rope and pulley, or better, get a second person on the roof. While you are up there, it is also worth checking your best trailer tires for travel trailers, since a loaded tire raises the draw on everything you plug in.
Condensate, filters and seasonal care
Condensate management is rarely discussed and causes real problems. A rooftop box dripping inside your ceiling is almost always a blocked or misrouted drain, and owners fix it with a drain kit or a pan rather than by replacing the air conditioner.
The rest is straightforward. Clean the filter twice a year, once in spring and once in fall, which is the standard advice across the forums. Check the vent gasket for cracks or compression every spring, and before storage make sure the rooftop box is powered down and drained so nothing freezes.
If you are replacing an old rooftop model, inspect the gasket on a curved roof carefully. Forum threads show replacements frequently failing to seal against a worn or mismatched gasket, and blow-by leakage around the intake and exhaust is one of the most common complaints in the category.
Frequently Asked Questions
What is the best air conditioner for a travel trailer?
For most travel trailers under 32 feet, a 13,500 BTU rooftop unit is the right size, and the Dometic Brisk II is the safest all-round choice because it has by far the largest owner base in the category. Trailers of 30 feet and longer with a separate bedroom benefit from 15,000 BTU or a ducted layout, while vans and small campers under 20 feet do well with 10,000 BTU.
What size AC is ideal to cool down a travel trailer?
Match BTU to trailer length: 10,000 BTU for trailers under 20 feet, 13,500 BTU for 20 to 28 feet, 15,000 BTU for 28 to 34 feet, and 15,000 to 18,000 BTU for fifth wheels and anything longer. In very hot climates, step up one size. Remember that a rooftop unit can only cool a trailer to roughly twenty degrees below the outside temperature.
What’s the difference between a ducted and non-ducted RV air conditioner?
A ducted unit blows cooled air through hidden ceiling ducts to multiple registers, so every room including a rear bedroom gets cold air. A non-ducted unit sends all the air out of a single ceiling plenum near the unit, which is simpler and cheaper to install but leaves hot spots at the far end. Ducted is preferred above about 30 feet; non-ducted is fine on shorter trailers with an open floor plan.
How do you keep a camper cool in 100 degree weather?
Run the AC early and often, since rooftop units cool fastest before the trailer soaks up heat. Close the windows and curtains once the interior is cool, park in shade or orient the trailer so the sun hits the opposite end, and use a reflective roof cover when parked. Add a fan to move air across the interior, since moving air feels cooler even at the same temperature, and keep the filter clean so airflow is not restricted.
Can I run an RV air conditioner on 30 amp service?
A 13,500 BTU unit is a comfortable match for 30 amp service. A 15,000 BTU unit drawing roughly 4,400 watts often trips breakers on 30 amp, and the standard fix is a soft start kit that ramps the compressor in gradually. Low draw models such as the RecPro 13.5K at about 1,300 watts, or any 12V DC unit, run on lighter power setups without extra hardware.
What is the 3 minute rule for air conditioners?
The rule of thumb is to clean or change your RV air conditioner filter every three months during heavy use, and at minimum twice a year. A restricted filter cuts airflow, which makes the compressor run longer, increases power draw and raises the risk of the unit icing up or failing early. It is the cheapest maintenance task in RV ownership and the one owners most often skip.
Which RV Air Conditioner Should You Buy?
After working through twelve rooftop models and the owner feedback behind them, the best rv air conditioners for travel trailers come down to a short list. The Dometic Brisk II is the default answer for anything under about 32 feet, because it has the deepest owner history in the category and a rating that holds up over many seasons. Buy the ceiling control kit with it, plan for a two-person roof lift, and you have the safest choice available.
Go a different direction in three cases. If you camp off grid, the OutEquip 12V 10,000 BTU model runs without a generator or an inverter. If you are replacing a 15,000 BTU rooftop box on a trailer with 50 amp service, the Coleman-Mach 15 Plus delivers genuine output with a SEER of 14.5. If your trailer is above 30 feet with a rear bedroom, the Furrion Chill Cube 18K has the most headroom, though it needs its distribution box bought separately.
Whatever you pick, size to the trailer rather than to the number, budget for the ceiling assembly and the thermostat, and remember the twenty degree limit. If you want a second cooling option for boondocking or a small room, our picks for the best portable air conditioners cover that side of the problem.