I Modified My RV Air Conditioner to Run COLDER & QUIETER: The RV AC Modification Explained in Detail 

I built the baffle last week. It works perfect. I measured the air velocity at two vents with a Radio Shack wind speed meter. Before the modification I measured 6 mph at both vents. After the modification I measured 8-9 mph at both vents. That is more than 40% in line with what others have found with this modification. Thx for the great directions

I DID IT ALL BY MYSELF! Not bad for a 77 year old grandma. I love your videos. You manage to show exactly where to work and what to do without skipping a step or getting your hands in the way so I can see what you are doing. I was a rookie camper two years ago and quickly found your site. When I have a problem, I go to you first for answers and usually find them. I’ve also purchased many of the products you’ve recommended-thankfully. Keep those videos coming.

I did this a couple of years ago, worked great. One thing I never hear about which I did also is increase the size of the vents. On our 30 ft 5th wheel we had one small round vent in the bedroom which never cooled the room. I popped the register out, felt the dimensions of the duct, cut a larger hole & installed a standard house vent. This was at the end of the duct, so I wasn't starving any other vents downstream. I greatly increased the comfort & airflow into the bedroom. When you think about it, it increases the airflow thru the A/C which increases the efficiency. I am a retired HVAC tech.

FINALLY!!!!! Hubby and I watched your video on how to get the a/c in our travel trailer up to speed and man!!!! Best modification ever!! It took us about 4 hours and we taped up everything inside the box that the factory should have done. We didn’t have a measurement for the improvement but we took a quick 2 night trip at a local campground for a trial run. We were totally shocked at the difference. Our 30 ft camper has one a/c and it’s always been a struggle to camp in the summer in SC and surrounding areas. Well, that’s old news now. We had to keep raising the thermostat from our previous settings. Actually got a little chilly :) So excited about this project and so happy for your helpful advice. We always learn something from you. We’ve been camping for years but we always want to know more. Your channel is a great resource. Thanks again

Great video and even better modification. It’s easy enough that anyone can do it. When I opened my unit up, there were so many air leaks due to a poor installation at the factory. After I got mine done, it’s noticeably cooler and quieter. I live in Texas and normally don’t do anything here during the summer. With this mod, tinting the windows and adding reflectix over the windows, I was able to cool my RV from 92 (inside), 104 (outside) to 75 in about 90 minutes. Best part, was the whole RV was cool.

You are a natural instructor - I could listen to you all day - your videos are very helpful and informative to me. Please keep it up! I’m a full-timer in SC, so I definitely need to make this modification. Thank you!

I did this upgrade today but in addition I removed all 5 registers. These were all retapped. The two near the ends I built a dam to stop air passing register into dead space. In addition I cut some of the registers 1 1/2” mount height making it easier for cooler air to flow into them. A full days work for a retired guy but the flow is much much stronger and I believe will be way more efficient! Thx for the tip to get me started!

*Ross your content is stellar buddy. Keep it up!*

I did this and WOW, what a difference! Air is now evenly flowing throughout the entire RV instead of just in the rear where the unit is. And YES, its MUCH quieter! Don't have to raise volume on TV when A/C kicks in anymore. Took 2 hours after supplies in hand.

Thanks for a excellent illustration. Getting ready for a two week trip gotta do this. Much respect OH IO

Im plannin on goin full time in October, buyin a brand new TT and ive seen a lot of negative videos when it comes to build quality of travel trailers, but seeing videos like this takes some of my apprehension away and gets me excited to modify/upgrade my trailer lol i do a lot of DIY with automotive and household stuff already and i work construction so im by no means a novice when it comes to this kind of stuff. Thank you for your content, definitely subscribed and looking through your previous videos 🤙🏼

I built the baffle today. It works perfect. Very impressed. Only thing was my bracket had a bar inward which pushed up a little on baffle. All good. Thx for the great directions. Derek

This inspired me to seal up my entire box. Have not build the baffle system yet. But using the metal tape decreased the overall noise of the AC unit dramatically and now all my ducting is working great. Actually my ac shut off and kept the trailer cool at 78 with 106 degrees outside. It was amazing. Thanks for the great video

I did it! I watched your video and decided to do it to my AC. I was doing good and my neighbor came and helped which made it go even smoothly. He measured and I cut. So happy with it since the weather is turning warmer. It will keep me and my fur babies cool. My camping club camps 4 days each month and various places and I wonder on my own sometimes. Watching all your videos, the next project is the upgraded thermostat. Thank you for all the great stuff.

Such a great detailed walkthrough of the upgrade. I upgraded the two air conditioners in my RV. What a difference between the output and also how much quieter it is. Thanks for putting it together!

Just finished and WOW. I've only had my TT for a week, but I wish I had done this day one. Slightly quieter, but much much more cold air from all vents. Just makes complete sense once you take it apart. Thank you for your instruction, sir!

I used your video as a guide on my 2018 Wildcat 5th wheel. I say guide because much of it wouldn’t work for me. But seeing how you did it enabled me to modify where needed to get it done. Immediately saw a marked improvement in air flow.

Hi friends. I saw you shared your link in RV Content Creators and wanted to get over and check out your video. Thank you for sharing it! This is really neat. We have talked about how some parts of our RV have better air flow than others. Adding the 45 degree cuts was a smart way to get a flush fit. The tape seems to be very forgiving once you get the parts mounted in there. Thanks for your great tips in this one. Great job!

Been saving your video for install day. Today was it, of course the main power wires were running right through the space. I was able to McGyver it to work. Thanks for the great video and details Ross! Happy Camping!

This has to be the best ac modification video I have seen!! I will be doing this!! I am also changing out my dometic sensitive touch thermostat to the easy touch. Thanks!!

Did one of mine today on Dometic, Huge difference!! Thanks, now to get a day off to tackle the easier one in the bedroom. Great video by the way. I used a table saw to rip angles etc, don’t recommend if your not good with a table saw. Kicks back easily. ET.

I just did this mod using your video as my instructions. It worked great and took less than two hours. Great mod, great video. Thanks!

After months of putting this off, I went ahead and did this modification. 100% worth it. About 2 hours worth of work and $25 in supplies. The noise being reduced and better air flow. Should have done this before we even started using the camper. Thanks for the great content!

Thanks so much for the mention! And great video. I think we have a project ahead of us on the new fifth wheel.

Just finished doing this....will test next time we take RV out as we did not have a level spot or time to test. Fit in very tight so hopeful for a successful project. Instructions were easy to follow

I did this last August when I replaced the AC unit. I am so happy with the outcome of the operation of the new baffles. Thank you so much for your instructional video. The AC is working so much better.👍👍👍👍

Just finished doing this following your video how to, man what a difference it made... with higher ceiling my AC did so so in keeping it cool during summer camping trips, can't wait to try it out.

I did this before my last 8500 mile trip down through Arizona, Texas and Mississippi. What a difference. Our trailer was freezing. Thank you. One thing to remember WHEN YOU TORQUE THE LONG SCREWS BACK DOWN THEY ARE TORQUED TO INCH POUNDS NOT FOOT POUNDS.

I had installed a similar device (tepee) a couple of years ago, but it was not as sealed as this method. Today I used your method. Was hoping for more air flow and lower noise. My lase device utilized some noise reduction also, so no improvement with this method. But the increase in air flow was 21 % which is significant. Very happy with your method! Definitely worth the effort.

This works! I did this on my camper, plus re taped the duct work at the registers, huge difference in air flow! Definitely worth the time!

I've been doing hvac 37yrs ,your never to old to learn.

Installed new AC today and did it to mine… what a difference!!!! Many thanks for the great vid and heads up!

I love this video! We just purchased a camper and where it was at, they could only hook a generator to it to show us how everything worked. He said the air worked great. We got home with it and needless to say it didn't cool and the bedroom was hot. My husband gets a kick out of me watching videos and fixing things. I watched this video, purchased the items and went to work. We were both amazed at the difference in made in this a/c!! Your instructions were great!

Dude, this was incredible advice. I built mine today, took me less than an hour in total and i had to have doubled my airflow. My divider had fallen out of place so there was nothing separating the warm and cool sides. I’ve never heard my ac kick off and on until now. I think all in i spent maybe $30. Great video

Finally got around to doing this in my 30 amp 2800bh and what a major difference in both noise and airflow! Excellent video and instructions!

Just did this and the difference is amazing. Thank you so much for showing this mod, you save me $170 I was planing on spending on th AC Airflow system.

I had the steel divider with spot welds attaching it to the flat sheet metal mounting plate, but my fan discharge was not centered so I had to tweak the teepee from your layout slightly. I went a step further and insulated around the whole vent opening with reflectix bubble wrap and aluminum tape. The cooling capability is 100 times better. My bunk area is getting much more flow. Actually, all the vents have higher flow rates. I suspect cold air was getting sucked and pushed into the hot side. My system cools so much better that both the blower and compressor cycle on and off. Thanks for posting this.

Good stuff. I try to never use the dump vents, never seemed smart to have cold air come out right next to the intake for hot. Your cold comes out & goes right back in. Good plug for Josh the RV nerd! Love his videos!

Howdy from South Texas Summer! It’s 103 and full sun outside right now, but after this mod it’s 72 in the main part of or 37’ Open Range fifth wheel with thermostat set to 71! I have only done it to the front AC. The bunk room vents in the back are blowing hard for the first time. My kids are now fussing it’s too cold! Thanks for the excellent tutorial and time you put into it. 🥶

VERY NICE! I was worried until you got to the teepee (triangle on floor) to held direct the air. Was pre-building in my head, but jumped ahead. GREAT JOB/IDEA, I’ll be wrapping mine up tomorrow. Thank you.

Great mod and instructional! A little sneaky how your tape just appeared tho, that was rather labor intensive. I'm not a qualified handyman but neither am I a slouch. I put 7 hours in on the ac unit and 2 hours in on the vents(not described here, just remove the cylinders and tape the transition from duct to each vent) After finishing the ac unit I had 39% greater airflow and a 4db reduction in noise. After doing the vents, airflow improvement was upped to a full 50%! Recommended if you don't mind putting the time in.

THANKS FOR THE GREAT VIDEO - WORKS GREAT! Just made the change two weeks ago - went on a 5 day trip in still hot Texas (not today - 37 and brrr) and it was so much better. We did not have to turn on the Closed Captions when watching TV, could actually talk to each other, and all but one vent was blowing great; BLOWING STRONG IN THE BEDROOM. Certainly plan to open the vent cover to the vent that is not blowing well to determine the problem, and will examine all of the vents so just make sure everything is looking good. The jigsaw works great, just know that you may need a mask and may want to try to contain the particles - they get everywhere - and they cling; but they vac up too! THANKS AGAIN!

We have this type of AC in our trailer and I'm glad we found this. The other videos don't talk about the divider. Thanks.

Thank you for your informative video. There is many videos available showing the same information, but yours was by far the best. I followed your instructions step by step and quickly got the job done. What a difference. I appreciate the help. Thank you!

You’re my new favorite rv channel to reference. Thank you times a billion 🙌

Pull all a/c vents and seal the gap between ceiling and vent with a/c tape. We went with RV Airflow System. I'm a licensed a/c service technician. only loosing the dump vent is well worth it. Great job on self manufacturing kit.

Please add some before and after decibels this is one of the best mod videos I have seen. Need to reseal my roof acs and will install this mod. Great job on the video.

Thank you so much for sharing. We have a Imagine XLS 22MLE. I just made the change. The noise is better, and we share see on the next camping trip in August to Buttonwood, PA. I used Gorilla double face tape to hold my electrical box to the side. Again, Thank you for the video. Fellow PAer.

I just completed this modification. It came out great. However, I did run into one challenge in that my power supply wire ran across the cold air side which I didn’t realize until I was half way through the modification. I can share some pictures of my work around that others may appreciate

I am absolutely amazed how well this modification is working! We have only done the front a/c and I am not sure we need to do the rear (bedroom a/c). Since we have a different coach, if we do the rear a/c we will be using 1/2 foam board. We are in the high desert in Southern Utah. Outside temps have reached triple digits, but the inside of our Palazzo has not been higher than a comfortably dry 80 degrees! Noise level has been reduced, but not drastically.

This is what RU-vid was originally supposed to be about and now it’s just about attention seeking narcs. Really like the video and attention to detail. Great job

I did this on my motorhome with both A/C’s. The difference in cooling volume of air was fantastic.

This is amazing. Saving to come back too because who doesn’t want quieter ac in their RV.

Ok finally did this and it worked great. One slight modification I did was to block off the port leading to the bedroom vents as we have the 2nd AC. My wife commented on how much quieter and cooler the living area is. Success!

Hey Ross I did this two years ago and it has been well worth it. My AC’s are Coleman Macs which I think are a little easier. My son’s ac is dometic like yours which is just little more time but worth it, his wife loves how quiet it is.

Did this today, huge difference. Thank you for the video.

This video was phenomenal for diy on my ac duct modification..Thanks so much for posting this video!!

Best explanation and walk through I have seen of this modification. Great job thanks!

My control board just took a dump yesterday. I plan on converting it to a twenty four volt with parts out of my truck today and will incorporate this seal and baffle idea you are pushing. I'm an HVAC tech so on my own stuff I have liberty in doing what I want.

I did exactly what you suggested, my trailer is on another level now! Thanks

Thank you for the great video with great details I have a 2023 Imagine 2600 Rb with the exact same AC I did the modification yesterday and wow what a difference Thank you 😊

My wife and I are going to try this with our two trailers. Hopefully we can start this weekend!

Genius!. Thumps up! I see people taking out the divider, wow! I knew i could improve mine, diy vs the 84$$ fix. Thanks!

I’ve watched a few of your videos now for mods as I’m getting ready to go full time in an RV. All I can say is you are providing an amazing service to many of us out here without a clue and have definitely gained me as a subscriber. Can’t wait to scroll through more and more of your previous videos

you are so good at demonstrating as you talk us through all the steps! keep on,, keepin on with what ya doin! cuz not just anybody can make a step by step , it takes a certain kinda person that can communicate their knowledge so thanks! its gonna help

Did this one myself. Thanks for the clear instructions. Works great!

Great video. This is a great upgrade and highly recommend it even for brand new camper. Much better air flow. This definitely should be the standard to prevent freezing up issues. The manufacturers should work with RV Air and incorporate their product into all campers. Thanks again for another great video. Keep it up and happy camping.

great details. easy to follow. I did everything just like you said and it's quieter and pushes more air out the vents!

Perfect educational video! Strait to the point and no getting off topic! Thanks for sharing this “cool” mod. I’m all over it 👍🏻👍🏻

Very thorough and informative. Well done. I made all necessary modifications leave in 5 days can’t wait to test it out

I would recommend taking a photo of the manufacturer labels before taping and closing up the AC

Thanks for this video! I did everything but the teepee to direct the flow. What a difference! Side note: Why the hell can’t the manufacturer do a better job than this???

Just did this today, came out awesome and I finally have AC in the front of my RV ! 😂 Thanks !!

Great video. I did this exactly like your video and I am amazed how quiet my AC is and how much more air is coming out of my vents. I have a 2022 Grand Design Imagine 17MKE and this should be how they come from the factory. Thank you!

This is my first exposure to your channel. But this video is so thorough and succinct that I’m subscribing. Thanks so much!

Absolutely amzing baffle build man!!!

Now I want an tv with one of these units so I can modify it. Great video

Great video, the noise is the biggest issue for me (I live in Michigan) I’m sure this will help with that too, I guess you could cut notches in for the dump feature to work after the modification, but I think I would try it without the notches first and go from there. Thanks again 🙏👍

Excellent tutorial. Will be doing this over 4 July holiday.

That video is amazing! Please keep the great content coming! You rock, I will do this mod soon

I went to do this mod on my 2022 Imagine 2670MK, and I guess Grand Design has been watching you.!My AC has had this partially done at the factory! There's a divider between the hot and cold, and a bit of a slope forcing the air into the ventilation. Great video though. You're easy to follow and enyoyble to watch.

Great idea. I purchased the rv air flow a couple of years ago also works GREAT, but costs way more. One other suggestion that I did, at the end of the duct work runs I put a piece of foam to block off any air leaks at the ends of the run. All of it helps a lot. Just wish the rv builders would insult the roof better. Keep up the good work.

Ross, trying to get a materials list in your description without watching the whole video in Lowe’s! I will say a year must make a huge difference in materials. The tape alone was $23.00 foam Board was $13.00 still cheaper than the $170.00 of the prefab model. Thanks for the post.

Great video, be a good idea to take a few pictures of the ac unit service labels before you put the tape on them.

Did it today! Thanks! I can tell that the Air flow is stronger, however the real gains here are how much it quiets the AC.. We might be able to watch TV while the air conditioner's on 😂

My baffle is in and I am ready to put the control box up and zip tie wires when I noticed that one of the wires is not going to any connection and has no evidence of being crimped in on of the connections. This leads me to believe that the 4 wire harness only needed 3 of the wires. I’ll test the AC before closing it all up. Great video !!

I had the exact set up you showed in the video. Worked awesomely

I did the A/C mod. Incredible, best mod to date. Thank you

Looks like great modification!!! And saves $200-$250 from a PRODUCTION Silencer Kit.

I just did this mod today on both of my dometic units and man what a difference. It cooled down my MH a lot faster. Going to see how long it takes to cool down in the heat of the day here in Las Vegas.

You should pull your vent registers and check to see if you have air leaks going into your ceiling. I had three of my seven ceiling vent with large openings. I use the same A/C tape on all of my vents. Good job on your video, I did both of my A/C, big improvement in air flow

Great instructional! Step by step, easy to follow. I just did this to my trailer and can’t wait to try it out in the TX heat. Did you torque the mounting bolts? If so, to what? Install instructions of my unit says 40-50 lb-in. I did 40 and I feel like I didn’t turn them as much when loosening. Thank you for the great video 👏👏👏

I watched this because my AC was barely blowing and wanted to try this before installing a second AC unit. Well it turns out that whoever installed the AC unit put that metal bracket in backwards and the air was mixing! I flipped it 180 and now it blows way harder! I plan on still doing this modification though because that summer heat is right around the corner

I have a 2005 Fleetwood RV 31 these baffles you're making is a killer idea as soon as I get off the crutches I'm going to do these mods and I will subscribe dude

Excellent modification. I did mine last night. Quick question: The Thermostat box in the return air, there is a wire coming from it that doesn't connect to anything else, I am guessing that is the wire that measures the temperature - or is it the whole box? If it is that wire, where is the best place to locate it. The AC is much quieter!! And, it doesn't seem to stay on as long - So, I am guessing that it did what it was supposed to do!

Thanks for all your knowledge and info! Really top notch and easy to understand and follow along.

Well thought-out and edited video, thanks!

I love having the same rig you do 😂…. This week project list keeps getting longer 👍

I took my cover off and it already has a divider like this and it all taped up pretty well. Good to know.

thanks for making this easy to follow. it gets hot in florida, thinking about doing this over the next week.