RV A/C Modification that will DOUBLE the Output & BOOST Performance!

35 thoughts on “RV A/C Modification that will DOUBLE the Output & BOOST Performance!”

• It’s funny, I did this to my unit a few weeks ago after seeing how in efficient it comes from the factory. I’m hvac certified & ur diy setup is top notch. Now whomever designed these units needs to return to school. Great video. Iv been keeping a eye out for condensation since the units designed to just dump in that area but so far so good. Gonna check out your other videos

• You cutting foam board with a jigsaw in an RV park would drive me nuts. Hope apologized to everybody around you.

• WOW! GREAT RESULTS!! Nice Job! Thanks for sharing!

• I wish I had a son like you to figure these things out for me! 🤗 from 👵(who just subscribed) God Bless you & yours❣️

• Awesome video! 👍👍👍

• Great instructional video. I'm headed to Lowes right now. Especially considering there's a company selling foam inserts to do the same thing for $170.00.

• Good aid to the ac unit.

• how much foam board did you start with?

• I just did both Ack’s they are Coleman 15’s
  One up front worked awesome the back one not so much. Hardly any air passage. I’ll check the inside pyramid part.
  Maybe trimming it down ?
  It’s sure sucking air though.
  Did I miss anything?

• We have two AC units on our 36 footer, and they can't keep up with triple digit temps. I'm definitely going to try this.

• Great idea and great video. I stumbled upon it because my ac works very well but is freezing up. I'm definitely going to do this once I figure out what is going on with mine. Thank you. 👍

• This reminds me of intake manifold porting. Such a no-brainer for more efficient airflow. Good job!

• I just did this mod to my mach 15 a/c's. Very easy and straightforward instructions and it feels like airflow has improved. A lot more cost effective compared to buying a $175.00 piece of plastic.

• Hey new BFF! I did this to both my ACs and it dropped the bedroom from 86 to 72 and the living room from 89 to 76. 102 degrees outside. It will be a little cooler with the ceiling fan on. Also, I didn't notice in the bedroom AC, but the main AC center divider was centered. It had 6" of duct showing. I moved that over 2.5 inches where the duct will get the full 8.5 wide inlet that it was designed to get. The intake side was not affected, because it didn't require the full width. No bypassing either. Very cool! I can't thank you enough. Take care BFF! Dale

• Thank you so much for sharing this diy!! Our main ac went out last year and our 2nd unit is for the bedroom only. The replacement ac was so noisy we couldn't watch TV and never really cooled our RV. There was barely any output from the vents in the living room or bedroom.

  The mod was simple for me to complete with little assistance. This one ac has our entire RV at a comfy 75°. We've already shared your video with others and are recommending they do theirs as well!

  Thanks again!!

• Thought my unit froze after the mod, but realize that I’ve had a problem for awhile. When I replace the unit I’ll mod it again. I did one more step, I added a fierce of 1/2 inch soft foam over the dump hole side of the grill for more sound proofing. Really quiet.

• I did this on out two Coleman air conditioners. I did an additional mod on your design by opening up the bottom of the “V” to allow more intake air thru the filters. Also I opened up the plastic support accordingly in an area for more surface for intake air to come in.
  Nice modification
  Thanks

• Great job, thanks for sharing! Doing it on mine next

• My unit froze up within a few hours. Any ideas? I believe I followed the video correctly. Any ideas?

• Just amazed at how quiet. Sitting under the unit and can barely hear it running. The air flow is also much improved. This mod changed our unit significantly for the better. Great video explaining it all. A BIG thank you!

• Do you sell these things. I know it's not hard, but u should sell them for lazy asses like me.

• Do you know if it would work with the 1” styrofoam board insulation that has the silver side? I purchased a sheet of it to insulate the pass through storage and would love to be able to use it if it would work just as good.

• Great idea, really appreciate your thoroughness’s, and workmanship , very clean .

• Would this be worth doing on a 2021 tracer 200bhsle? It's only 25 feet long and basically single room

• Makes perfect sense! Thanks for the super-informative vid! stay cool.

• Just curious sense it's been a year have you had any problems with your ac freezing up.?
  I'm seeing a lot of good reviews and I'm preparing to do this project on my ac's in the next couple of day.
  Keep the diy's coming.

• 74 degrees is cold?

• Oh my goodness, this must be what is wrong with our midbunk!! Did it make a big difference in cooling that room?

• It isn't doubling the output it just seems that way. If a camper's A/C unit stinks when new it's because of inadequate circulation not output. If it gets weak over time dirt is the culprit if it hasn't been cleaned. Putting foam to restrict flow from the plenum forces more air through the auxiliary vents throughout the camper which is what you did. A/C performance can also be very easily be improved by adding a box fan. Happy camping!

• The way that ac duct is designed if the unit itself was of the capacity it should be there would be no problem. It a house duct system it is design according to the square footage to what size unit you need.. but the duct work can take away or add to depending on how it's built what you have done is an will no doubt be an up grade to your system. When a unit comes on an fills the main duct an than distribute out to the outlets we used to measure the flow of air by pressure in each room with door closed. Don't know what size unit that is but if it was ten or fifteen more thousand btu you wouldn't have had that problem. Your unit compressor may produce enough cold air but the fan that's pushing the air is to small. What you did is actually pretty smart only thing you could do besides changing rpm on ac fan. Definitely a flaw in design on ac manufacturer an RV manufacturer for picking that size unit for your RV. Enjoyed the video it amazing sometimes when people do intelligent things to improve their lives

• Almost unbelievable! We are at the lake over 4th of July. No shade, it gets hot here. 15k ac struggles mightily here every year. We ate usually lucky to get mid 80s inside during the day and it takes hours to cool down at night.
  Did this before we left Friday morning, took about 20 minutes total. It's 74 inside right now, very comfortable throughout the camper!
  Awesome mod!!!

• Fantastic modification. I'm going to pick up materials and do my rv.

• Saw this Last night and sent a link to my husband. I woke up this morning to find that he was outside, already doing this. 😀 Thank you.

• Very well presented. Thank you.

• I did a similar mod prior watching your video and it worked okay too, but because I am running on batteries, solar and inverter it still was to much power draw. So, I added a relative affordable ($450) Inverter Window AC (12000 BTU) and it runs on seamless speed and uses a fraction of the power, plus is much more quite. The install was much easier and cheaper then adding a mini split inverter AC

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