Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White

Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White

Item # ACM150C

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RV Air Conditioners

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Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough. Lowest Prices for the best rv air conditioners from Advent Air. Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White part number ACM150C can be ordered online at or call 800-298-8924 for expert service.
  • All Info
  • Reviews (5)
  • Q & A (11)
  • Videos (2)
  • Photos
  • Why etrailer?

Advent Air RV Air Conditioners - ACM150C

  • 15000 Btu
  • Non-Ducted Ceiling Assembly
  • Advent Air
  • Standard Air Conditioner

Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough.


  • Air conditioner quickly and efficiently cools the interior of your RV or camper
    • Replaces, upgrades, or adds an air conditioner and air distribution box
    • Compatible with only ductless systems
  • 6-Blade fan with motor has 3 speed settings for increasing or decreasing airflow
  • Air distribution box has adjustable registers on the front and back that let you direct the air where needed
    • Internal aluminum components are rustproof
  • Built-in thermostat controls the fan and temperature settings
  • Start capacitor jumpstarts the AC when a campsite or generator doesn't provide enough power
    • Stores energy that will later be used for the next startup
  • Thick, collapsible gasket with 6 foam pads provide support between RV roof and air conditioner
    • Gasket seals the opening to prevent water seepage and air leaks
    • Foam pads help reduce noise
  • Removable air filter prevents dust and dirt build-up on the fan blades
  • White, hard plastic cover protects internal components from water and debris
    • Can easily be removed for maintenance and cleaning
  • Bolt-on installation
    • Includes wiring harness and mounting hardware
  • Electric heat strip (ACMHD - sold separately) can be added to remove the chill on cold or frosty mornings
  • UL and cUL certified


  • Fits: roofs 2-1/2" to 5" thick
    • Opening size: 14-1/4" long x 14-1/4" wide
  • Air conditioner power draw (while running): 15 amps
  • Compressor power draw (while running): 12.4 amps
  • Fan motor power draw (while running): 2.6 amps
  • Capacity: 15,000 Btu per hour
  • Electrical rating: 115V, 60Hz
  • Air flow: 500 cubic feet/minute
  • Thermostat temperature range: 65 F to 90 F (16 C to 30 C)
  • Overall dimensions:
    • Air conditioner: 31-3/16" long x 24-7/8" wide x 12-13/16" tall
    • Air distribution box: 22-1/2" long x 21-1/2" wide x 3-1/2" tall
    • Start capacitor: 2-1/8" long x 3-5/8" deep x 6-5/16" tall
  • Refrigerant: R410a, 16.9 oz
  • Wire gauge: 12 AWG
  • Air conditioner weight: 68 lbs
  • 1-Year warranty

This Advent Air AC unit lets you replace an existing, old or broken air conditioner or add a new air conditioner to an area on your RV or camper that doesn't already have one. The AC has a powerful fan and motor that provides a steady stream of air to efficiently cool the inside of your RV on a hot or muggy day. For your convenience, the included air distribution box has a built-in thermostat that lets you set the fan speed and temperature. The included start capacitor will help jumpstart the AC. This beneficial upgrade provides the AC a boost when shore power or generator power isn't enough to start it. And everything you need in order to replace or add an AC unit is included, which makes installation simple and easy.

Air Distribution Box and Thermostat

Advent Air Air Distribution Box

The AC unit includes an air distribution box with a built-in thermostat. The dial on the left controls the 3 cool settings and the 3 fan speed settings, which let you increase or decrease the airflow. If you add an electric heat strip (sold separately) to remove the chill on cold mornings, then the dial also controls the heat setting. The dial on the right allows you to set the temperature. Additionally, there are adjustable registers on the front and back of the box. These can be tilted up, down, or side-to-side for directing the air where needed. The removable air filter prevents dust and dirt from building up on the fan blades.

Start Capacitor

Advent Air Start Capacitor

If your campsite or generator isn't able to draw the power you need, then you may have difficulty starting your AC unit. The included start capacitor, however, can eliminate this problem. The capacitor stores energy that will later be used to jumpstart the AC. Once the sufficient amount of power has been supplied to the AC, the compressor will start to run, and the internal relay switch will turn the start capacitor off. At the same time, the compressor will send "back voltage" to the relay switch and capacitor in order to energize them for the next startup.

Simple Installation

Advent Air AC Installation 15,000 BTU

Because your RV is likely already prepped and pre-wired for an AC unit, installation is simple and easy. Most AC units, including this one, are designed to fit an opening that measures 14-1/4" x 14-1/4". Depending on your roof setup, you may need to do minimal alterations. If the opening is larger than 14-3/8" x 14-3/8", you will need to install spacers between the sides of the unit and the opening's edges. If the opening is smaller than 14-1/8" x 14-1/8", you will need to enlarge the hole to fit the unit snugly inside the opening.

Advent Air AC Collapsible Gasket and Foam Pads

On the bottom of the AC, there's a thick, collapsible gasket with 6 noise-reducing foam pads. This provides support between the RV roof and AC and seals the opening to prevent water and outside air from leaking in. Because of this, the use of fresh sealant isn't required during installation.

To install the start capacitor, bolt it to the fan motor support with the included hardware and then route the wires to the run capacitor.

Once installed, the hard plastic cover on the AC can easily be removed for maintenance and cleaning.

ACM150 Advent Air RV Roof Air Conditioner - 15,000 Btu - White

ACDB Advent Air RV Plenum for Air Conditioners - White

ACMSCKIT Advent Air Start Capacitor for RV Air Conditioners

ACM150C Installation InstructionsInstallation Details ACM150C Installation instructions

California residents: click here

Video of Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Best Rooftop RV Air Conditioner Options

Randy: Hey, guys, it's Randy here, at We get questions about AC units all the time, so we spent about the last week and-a-half running a bunch of tests on the different manufacturers. And what we are going to talk about today are the 15,000 BTU class, the Furrion, which we have here, in the middle. It's actually a 15,500 BTU AC unit. But we've got some really good results. Now, we'll just run down the summary now, so if you're just worried about the information, we'll give it to you, and we'll explain it a little bit more in depth if you want to stick around.But basically, the first concern most of our customers have is going to be noise.

As far as noise go, the Furrion and the Atwood inside your RV are going to be the quietest. They are about 10 decibels quieter than what the Advent, based on the testing we we're able to come up with. Basically, the Atwood here, it runs at about 67 decibels with the compressor on, fan going. The Furrion's at about 66. Now, both of these are going to be very similar to a normal conversation at about three to five feet away.

When we look at the Advent, this was up 77, 76, just depending This is going to be . You get the additional airflow, but this is going to be closer to the sounds that you generally get from a washing machine.The next big question is always temperature difference, like how much cooling capacity does it have With the Atwood and with the Advent, they both brought down the ambient air temperature about 20. The Furrion was closer to 30. So, this one's definitely better at cooling the air. Surprisingly enough, even in June here in Missouri, we've still got pretty nice weather.

So, we tested all of these at about 74. 74, 75, something like that.And what we got essentially, is that with the Atwood and with the Advent, they both brought our air temperature from that 74 down to 55, 54, somewhere right in that range. So, these are about 20 cooler than what the air is outside. Now, if it's at 100, you might not get a full 20, but that's where they sat. With the Furrion, I was really impressed with it.

Same temperature, 74, 75, this thing got down to 43 a couple times, 44, 45. So, this one's closer to 30. Now, that's measured directly where that air comes out of the duct. We put our temperature sensor right there so we could pick it up as close to the source as possible.As far as generator use, a lot of times you'll be out boondocking, you'll be out somewhere where you don't have access to plug-in power or shore power. And they all would start with our generators. We used our 3200 watt etrailer generator. We could start each of them without any problems at all. The thing that comes in, and the one that I would recommend for generator use is going to be the Furrion. The Furrion's compressor uses a separate motor than the evaporator, versus the Atwood or the Advent. So, these, while they don't really require any more power to start than the Furrion, these take a little bit longer. So, they put a longer period of drag on your generator. That could cause, in some cases, depending on your generator brand, for these not to fire.The Furrion has a much shorter cycle there. The compressor kicks on very rapidly. So, I like this one the best. The generator doesn't hardly have time to recognize the load before it's up and running. So, that's something to keep in mind there. Another question we get are about capacitors. Capacitors are a small, kind of like a coil, or kind of like a battery, and it can store power inside. When we ask the AC unit to come on, that capacitor discharges that energy it's got, and it helps out. It wants to help it along.So, basically, what we we're doing is testing them. The Atwood comes standard with a capacitor, the Furrion comes standard with a capacitor, the Advent does not in most cases. So, what you'll need to do if you want to use this, especially if you're going to be using it with a generator, get a capacitor, install it in there, and it's just going to help with that initial start up. It's going to help it out just a little bit, trying to give it that little bit of boost that it needs to get everything working properly.As far as the generator questions, we get those a lot, and people want to know which generator they need to use to power them. And basically, this is going to be pretty specific, but our etrailer generators, whether you're using the 3200 or two of the 2000's paralleled together, they started these each and every time with no issue. To go a step further than that, our two etrailer 2000 watt generators really surprised me. We ran the Atwood, which we started first. After the Atwood was running, we started the Furrion, and they fired right up. I was really surprised. Same to be said for that 3200 and parallel, or the 3200 and 2000 watt kit we made. So, if you've just got one air conditioner on there, any of those are going to work out really well for you.If you're going to be running two, the only exception would be if they both try to start at the exact same time. That's one of the most rare instances, I think, that you'll ever encounter, but if it does happen, it's going to trip your generator. You'll have to restart it. So, just keep that in mind. But outside of that, they all work really well, even with the large BTU ratings, with those generators that I've mentioned.The last is going to be airflow. And basically, the Advent, while it is the noisiest like we talked about, it seems to put out the most air. But it's not quite as cool as what we get with the Furrion. The Furrion's a little bit cooler, doesn't blow quite as much air. The Furrion's going to be for me. I like that bigger temperature difference. And then the Atwood, it just kind of stays right there in the middle. The airflow on this one's a little bit less than the Furrion. It cools at the same rate as what the Advent does. So all in all, they all do a good job and they're all going to work.I think the biggest reason you might want maximum airflow is if you've got a ducted trailer. We're going to have one AC unit in the back, let's say, of the trailer, and we're trying to get it to push through those vents all the way up to the front. Outside of that, I think all three of them are going to be really adequate in that department. Now, looks are something that can sometimes be important. Back in the day, campers, none of them looked very nice maybe, except for the Airstream. It had a nice look to it. But the rest of them just looked like squares or rectangles.Anymore, the campers are stepping up their game. The camper manufacturers are looking nicer and nicer. And in my opinion, I know beauty's in the eye of the beholder, but in my opinion, I really like the looks of the Furrion. It has a really nice, New Age kind of a look. You can see it's got good lines on it, very aerodynamic. This one happens to be the one with the white top. It's also available in a black top. My second favorite in the looks department is going to be the Atwood. It's a little bit more outdated in the appearance, slightly. But again, this is something that's going to sit up on top of your camper, and you're probably not going to look at it very often.But if you want your camper to look nice sitting out there, again, Furrion is where it's at. With the Advent here, I think it's slightly more outdated than what that Atwood is. So, again, beauty is in the eye of the beholder. Everybody likes what they like. But with the new lines and kind of the new design on this Furrion, I think it's going to stand out amongst the other ones.Now, as far as which one I would pick and which AC unit I would choose to use, basically, that's going to be the Furrion. I like the colder temperature, I like that quicker start when we are dealing with generators and things like that. All three of them are going to be adequate. I mean, the Atwood is extremely popular. The Advent, we sell just about as many as we can get. So, they all do a good job. I just, after playing with them for the last couple of weeks, I think the Furrion would be the way I would go.

Customer Reviews

Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor - 15,000 Btu - White - ACM150C

Average Customer Rating:  4.0 out of 5 stars   (5 Customer Reviews)

Ductless AC unit lets you replace an existing AC or add a new AC to your RV. Air distribution box has a built-in thermostat to control the fan and temperature. Start capacitor jumpstarts the AC when camp power or generator power isn't enough.

- ACM150C

Sent wrong parts , but Reesa in customer service quickly rectified the problem and shipped proper stuff. Awesome team of people. SPECIAL THANKS TO REESA !!!!!!! 522428

- ACM150C

Received product on the day promised. Product had a little damage from shipping. Don't think it will affect the ac working properly. Haven't installed yet. Planning on it this weekend. Will follow-up. Ac seems to be better made and heavier duty than the original. 573737

- ACM150C
by: did they job delivering it on time, good packaging and working properly. This equipment does a good job, in the trailer is always way cooler than outside, but I still wish the AC Unit was a little more powerful. I won’t complain though, it was definitely a cheaper equipment. I could have spent a lot more in a different unit. 729053

- ACM150C

Keeps the horse trailer really cold during the 100 plus degree summer, Only thing is when it rains it leaks but that could have also been user error when installing it. We had to replace our old AC since it quit working on us and this one is doing the job really well. 725612

- ACM150CH

Review from a similar Advent Air AC Assembly in RV Air Conditioners

I wanted you to know that the heater for the rooftop air conditioner is worthless. It only has a 10 degree temperature drop. One of the issues is that the rooftop fan runs on high and you can't slow it down. Unfortunately we have a space heater in the trailer to heat the trailer. 593501


According to ASA, the manufacturer the # ACMHD is a heat strip, not a heater. A lot of people are confused by this. The heat strip is designed to keep the trailer above freezing and is only 1400W. It is commonly referred to as a chill chaser because that is the purpose - not a heater to provide heat. This is most likely on a non ducted system and does not have a wall thermostat, it is designed to run only when the fan is on. It sounds as though the needs would be better met with an actual heater as opposed to a heat strip.

-- Mike L - 01/03/2019


Ask the Experts about this Advent Air RV Air Conditioners

Do you have a question about this RV Air Conditioner?

  • Recommended AC Unit for 22x8x7 Foot Race Trailer
  • Since you don't currently have and AC unit, I recommend the Advent Air Rooftop RV Air Conditioner w/ Ceiling Vent and Start Capacitor - 15,000 Btu - White # ACM150C. This will give you the ability to cool your race trailer faster and won't have the big power draw at start due the integrated capacitor. The Atwood Air Command Rooftop RV Air Conditioner - 11.3 Amps - 13,500 Btu - Non-Ducted - White # AT15025-21 will also work well for you but is not priced as nicely and does not have...
    view full answer...

  • Best Priced 15,000 BTU AC Unit for Car Hauler
  • Your best option is the Advent Air RV Air Conditioner with Ceiling Vent and Start Capacitor # ACM150C. This is a 15k BTU unit that comes with a starting capacitor, has controls on the unit, comes with vent assembly to mount inside RV, can blow straight down with the adjustment angle of the vent and has the best price. For more info on this unit check out the review video I attached as well.
    view full answer...

  • Is the Atwood Air Conditioner Vent with Thermostat Compatible with Coleman Rooftop Air Conditioner
  • The Replacement Vent w/ Thermostat and Remote for Air Command Rooftop RV Air Conditioner - Non-Ducted # AT15021 is not directly compatible with Coleman Rooftop AC. We have conversions the other way to replace rooftop AC units but the thermostat and vent replacements have no compatibility with Coleman rooftop units. All I can offer is a complete replacement since you need the thermostat and vent on the interior. For a complete replacement I recommend the Advent Air RV Air Conditioner...
    view full answer...

  • Installing Advent Air AC Units on 40 Foot Bus
  • Two of the Advent Air RV Air Conditioner # ACM150C that you referenced will definitely be enough to cool down your 40 foot school bus. I did reach out to my contact at Advent Air just to get his opinion on this particular application along with obtaining the power draw of the unit to see what type of generator is needed. He said before proceeding there are a couple things you will want to be aware of. This AC unit (along with all of the Advent Air models) are designed specifically...
    view full answer...

  • Recommended RV Rooftop AC Unit with Ceiling Vent and Controls
  • Great question. We do have the Advent Air Rooftop RV Air Conditioner # ACM150 with the interior components. It is part # ACM150C and it also includes the start capacitor. That capacitor is extremely helpful in making sure you can start your AC even when the shore power isn't able to draw that capacity. The capacitor will automatically refill to ensure you never have an issue starting your AC. The vent assembly has a built in thermostat to control fan settings and temperature. There...
    view full answer...

  • Does Advent Air AC Unit Have to be Powered by a Generator
  • AC units like the Advent Air RV Air Conditioner with Ceiling Vent # ACM150C draw quite a bit of current. For example this one draws 1,750 watts at 115 volts. This would be too much draw for the electrical system of your 1999 Ford F-450 and also not the correct voltage since your vehicle is a 12 volt system. You also have to consider that you'd be most likely running this when the vehicle isn't running which would kill the battery very quickly. Something like the # 289-AP5000 should be...
    view full answer...

  • What Size Generator To Run Advent Air RV Air Conditioner 15,000 Btu With Start Capacitor
  • I contacted Advent and the Advent Air RV Air Conditioner w/ Air Distribution Box and Start Capacitor part # ACM150C needs at least a 3,000 starting watt generator to start the air conditioner even with the start capacitor present. I recommend to use etrailer 3,200-Watt Portable Inverter Generator - 2,900 Running Watts part # 333-0003 which will give you enough starting watts to start the air conditioner and extra to run a small appliance if you needed to. It also has a remote start so it's...
    view full answer...

  • Can I Install Advent Air Conditioner In Skylight Cut Out On Travel Trailer
  • The Advent Air RV Air Conditioner part # ACM150C installs into a 14-1/4" long x 14-1/4" wide roof opening. If you remove the skylight and the opening is smaller than 14-1/4" long x 14-1/4" you can carefully cut the opening to make it larger, however it is recommended to install the unit slightly forward of the center of the center of the roof and centered from side to side. I have attached diagrams from the installation instructions for your reference.
    view full answer...

  • Recommended AC Unit for 26 Foot Enclosed Trailer
  • To cool down your 26 foot enclosed trailer I highly recommend the Advent Air RV Air Conditioner # ACM150C, which includes both the air distribution box and a start capacitor as well. The start capacitor in particular is a great feature that basically stores up energy to use for when the AC kicks on, conserving energy and reducing the amount of power needed from your batteries or inverter. The AC unit uses a 6-blade fan with motor to increase/decrease airflow, a built-in thermostat...
    view full answer...

  • Ductless Air Conditioner for 40 Foot Race Trailer
  • That's a good question and realistically, one of the 15,000 or 15,500 BTU air conditioners may be enough to meet your needs, it just depends on different factors, such as how much time you are spending in the trailer, the temperature outside and if any part of the trailer is going to be open for any period of time (I know some of these trailers have side doors as well). Since you can always add on, what I recommend is just starting with one unit, the Furrion Chill RV Air Conditioner...
    view full answer...

  • Can a Wall Thermostat Be Added to the Advent Air RV Air Conditioner Kit ACM150C
  • I do have other options for you but the Advent Air RV Air Conditioner Kit part # ACM150C is not designed to be used with a wall mounted control nor does it come with one. Instead, we have the Furrion Chill Premium RV Air Conditioner System part # F15PA12SASA-W (15,500 Btu's) or the Atwood Air Command Rooftop RV Air Conditioner part # AT15025-21 (13,500 Btu's) which come with wall/handheld controls. The Atwood Air Command Rooftop RV Air Conditioner does only have a 13,500 Btu's rating...
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Chris R
Updated by:
Mary E
Updated by:
Sarah W
Updated by:
Halie H
Updated by:
Adam Y
Written by:
Amanda M
Installed by:
David F

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