What Size RV AC Do I Need?

If you are looking for a new RV AC, but aren’t sure what size it needs to be, then you have come to the right place. By reading this guide, you are going to learn all about what an RV AC is, why they’re useful, how easy/hard it is to install an RV AC, along with the size of the RV AC that you need.

What Size RV AC Do I Need?

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What Is An RV AC?

In essence, an RV AC is an air conditioner that is designed for an RV. Since an RV AC is designed for an RV, rather than a traditional home, it looks a little different from a traditional AC and it functions a little bit differently, as well.

Why Is An RV AC Useful?

Having an RV AC is exceptionally useful, because it allows you to bring cool air into the interior of your RV.

If you are driving through a hot and humid location, or are staying somewhere that’s very warm, then having an RV AC ensures that you won’t be uncomfortable during that experience.

Many RV ACs offer more than just air conditioning functionality, though; they also offer heating functionality. By making use of this heating functionality, you are able to cool the interior of your RV, and to heat it up, as well.

How Easy/Hard Is It To Install An RV AC?

The answer to this question definitely depends on both the RV AC, and the RV that it’s being installed into.

Do I Need Two Air Conditioners

If the RV AC is extremely heavy, and no one is helping you bring it to the top of your RV, then that will make the installation process very difficult. If the manual is difficult-to-understand, and you are unsure as to what you need to do to install the RV AC, then that, too, will make the installation process very difficult. If the design of the RV AC is convoluted and confusing, then that will also make the installation process quite difficult.

If, to name some alternatives, the RV AC is relatively lightweight and designed in a clear and concise manner, then it will be significantly easier to install. If the manual that the RV AC comes with is easy-to-read and understandable, then the RV AC will be especially easy to install.

For the easiest installation process, find an RV AC that is lightweight and well-designed while also coming with a good manual.

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What Size RV AC Do I Need?

What Size RV AC Do You Need?

To install your new RV AC, you will have to do so by going onto the ceiling of your RV and placing it through the duct hole that is on your RV. To find the right size for your new RV AC, you must measure that duct hole.

How to Select the Best Portable RV Air Conditioner

Without measuring the duct hole, you may end up purchasing an RV AC that is too big – or small – for the RV. But, when you know the size of the duct hole, you can purchase an RV AC that is just right for the specifications of your RV.


In the end, every RV is a little bit different when it comes to the RV AC that they need. To find the right RV AC, measure the duct hole in your RV’s roof and use those measurements.

RV Air Conditioner Buying Guide

Overall Recommended RV Air Conditioners
High Capacity15,000 BTU13,500 BTU
Dometic 641816CXX1J0 Penguin II Black 410 Amp Low Profile Rooftop Air ConditionerDometic Air Conditioners B59516.XX1J0 Brisk Air Ii 15.0 Blk UpperDometic 640315C Penguin II 410 Amp Low Profile Rooftop Air Conditioner(Polar White)
Dometic 641816CXX1J0Dometic B59516.XX1J0Dometic 640315C
 • Universal Fit
 • Low profile
 • 29 x 40 x 9.5 in
 • 110 pounds
 • More Info >
 • Ducted or non ducted
 • Easy installation
 • 29.18 x 27.23 x 12.7 in
 • 74 pounds
 • More Info >
 • Three-speed blower
 • Quiet power
 • 29 x 40 x 9.5 in
 • 99 pounds
 • More Info >

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