Turbo-Charge your RV AC with RV AirFlow! (40% Improvement on Average!)

See how you can GREATLY improve your RV’s AC system!!! We got a HUGE 45% increase with RV Airflow! 💨💨
⬇️⬇️⬇️⬇️⬇️ Click Show More ⬇️⬇️⬇️⬇️⬇️
NOTE! This is only for RVs with ducted systems.
Also Note: Dometic and GE Units are now available!
Be sure to use code "CHANGINGLANES" for 15% Off!
🅱 Full Blog Post: changinglanesrv.com/rv-airflow
UPDATE (July 2021): We've had a few questions on the torque values we mention in the video.
I got them from the RVAirflow document here: cdn.shopify.com/s/files/1/041...
It cites Coleman manufacturing as the source…
However, looking at www.airxcel.com/DesktopModule... it just says, "Proper tension has been achieved for each bolt when any portion of each gasket indicating tab has been pulled down even with the roof. See Figure 4. The upper unit has now been properly installed with optimum gasket compression.”
Our take: Use your best judgment. If the torque value seems too high, revert to the instructions from AirXCel.
Links 🔗
* RV Airflow Systems: changinglanesrv.com/rvairflow (don't forget code CHANGINGLANES at checkout for 15% Off!)
* Compatible RVs and fitting guide: rvairflow.com/pages/compatibl...
* RV Airflow Install Video: • RV Airflow Systems - C...
* RV Airflow Install (Opa and Oma’s Camping Adventures): • RV Airflow Systems-AC ...
* Opa and Oma’s Camping Adventures: / @opaandomascampingadve...
* RVAir MERV 6 Air Filters: amzn.to/3wgt4Ke
* DEWALT DCF887B 20V Brushless 0.25" 3-Speed Impact Driver: amzn.to/31Grz8g
* CRAFTSMAN Drill/Driver Set, Impact Ready Bits: amzn.to/35vYOfI
* DEWALT Magnetic Bit Holder: amzn.to/34r4SXf
* Wheeler Torque Wrench with Inch/Pounds: amzn.to/34smORF
* 16.5FT Aluminum Telescoping A-Frame Extension Ladder: amzn.to/3jnbcU4
Related 🎥
* RV AC Maintenance: • Full Time RV Maintenan...
✅✅ ALSO SEE
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👀 Check out our personally curated Amazon store: changinglanesrv.com/amazon
👀 Road Life Project: changinglanesrv.com/RLP
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[@tonyhouston3049]

Being an HVAC tech I installed sheet metal scoops. doubled my air flow

[@Command37]

Can you send me pics please?

[@wannabefulltimers]

I'm continuously amused by the severe lack of engineering / design of these RV manufacturers and their vendors. They build cheap crap knowing fully that its garbage and then 3rd party companies (like the inventor of this product) actually design something that WORKS and we have to then spend more $$$$. It's absolutely amazing. I guess that's what makes the economy continue to work. Either way, you always have the BEST reviews and install vids AND the best bloopers! Appreciate you both.

[@uowebfoot]

The RV industry is a joke. There are no standards and they have a bunch of minimum wage guys throwing these things together as fast as possible to make their quotas to make their bonuses. Most QC is poor as well. I know 2 people that worked for Monaco coach here in Oregon and they both said nobody really cared about quality. It was just getting them out ASAP.

[@wannabefulltimers]

@@uowebfoot you're not kidding...it really is about how quick they roll them off the production lines. But, it's not just RV's, it's new homes too. We just bought a new home (almost done being built) and these builders don't give two shits about quality. There's no pride in workmanship anymore in this country on anything...very sad.

[@hermes6587]

If they built to higher standards the average buyer would not pay the significantly higher cost, since the average RV buyer only looks at only the floor plans, colors etc. Often what makes a better or higher quality unit is not readily seen or touched. The RV market is highly competitive. Further they know that for those RVers who appreciate quality will make improvements through the after market.

[@wannabefulltimers]

@@hermes6587 Your point is somewhat valid. However, my father has owned several RV Bus Motorhomes well over 100K in price and they fall apart just as bad. So high price does not mean better quality.

[@michaelprosperity3420]

@@wannabefulltimers My wife and I looked at a home built in 1957 and it had everything top of the line from that era. Everything was like brand new and bullet proof.

[@TheRVDummies]

Wow this is awesome! We have been making our own version of this for years and it is nice to see a company that address the need for this. Thank you for showing the testing numbers and results because that mean a lot to us! You guys are awesome. Thank you.

[@ParadigmReptiles]

Chad did an excellent job explaining how this all works.

[@kevinbird2146]

You guys always have the greatest advice and information. Thanks for all you do. I have a 2020 260RD and had this installed at the Vegas GD rally just before things shut down. I only have the one rear unit and could feel the difference right away. Being in AZ, it does make a big difference cooling the unit!! Would recommend to anyone. Keep up the great work and great videos. Stay safe!

[@PastorwithoutaPulpit]

The outtakes show just how much work and prep goes into one of these reviews. Thank you both for all your hard work that probably at times seems like play. Safe travels and God Bless...

[@powers9137]

Army here also wanted to say that you are a great teacher not to many people have that!

[@stevenfledderman9586]

Wow, I’ll have to try this. 40% improvement in air flow! That’s awesome! Thanks you all. Loving it as always. 😁Spoiler alert!😎

[@paulwilliams7964]

Ordered with your discount! This was a great improvement over what we had. Anywhere in the RV, you can feel the AC blowing now. Thanks for the video!

[@sherriweber7105]

Thank you for this video. Glad you did this video. It helps us to know what to do and how to fix the air duct flow. It was good seeing daisy too at the end. She is a cute puppy. Stay safe and see you soon!

[@pormisericordia]

I'm a newbie RVrd and you guys explain everything so cool, simple and detailed. Thanks! And God bless you always 💖💖

[@randallhall8998]

Awesome job, very straight forward video on the installation. I am a HVAC guy and am totally impressed. We also have a Momentum with 3 units, living mostly in Texas and that will really help.

[@debbresnahan321]

Been binging you guys backwards cuz I started watching ya late n am loving going back. I’m addicted now. ❤️❤️

[@lynnsteiner1580]

We’ve sold our RV but still enjoy your videos.

[@lindaburlison2341]

I love the little break there where dog is positioned “to watch from your silk pillow” lol!

[@nateparry3368]

Great job! I learn so much every time I watch your videos.

[@jimbeckyAdventures]

I know this is an old video but it is by far the best one. I just installed mine and your video had EVERY question I had, answered. Thanks for the discount also. Hope to see you guys out there

[@lisa62723]

Always enjoy learning from you guys😎 Thanks for providing practical instructions...love your channel ❤

[@dennycappetta2035]

Wow! What a great product! It makes total sense. And Chad your explanation was terrific.

[@doiturself4459]

You guys have really done a great job with explaining the important elements and paying attention to measurable details. I was tweaking my ac due to the obvious design flaws. This is the best option. My dad was a mechanical engineer and he always said you can't beat an engineer with a pair of pliers. Time and money saved here for sure. Thanks!

[@browniac]

Awesome!! Any improvement in AC is worth the cost and I've said it before - and like I've said before, every time I watch one of your videos Chad it costs me a couple of Benjamins - but totally worth it EVERY time!!!! Thanks for letting us all know about this, I'm ordering as soon as I finish typing. Safe travels!

[@jaywuchner9342]

Just installed the RV Airflow System. Straight forward installation and the airflow increase is as advertised! Thanks for the discount, it's worth every penny.

[@Lifes_RV_Adventures]

You two always have good information! If I need any information about maintenance stuff on my toy hauler, I just look to see what Chad has done.

[@jloppyhotmail]

Thank you! Discount code covers shipping and a little extra! Appreciate the fact that you both worked on this to collect & analyze the actual installation. 40% airflow removes need for second A/C...at 15% of the price of another unit!

[@jbs6370]

Air Conditioning performance is all about air flow. Great product!

[@Tek_Kevin]

I just wanted to write my first comment to you both and thank you from the bottom of my heart for your all your videos. I am receiving my AirFlow units in a few days and can’t wait to get them installed. I am just a single guy, full time in my 351M and winter in Arizona and summer in Wisconsin. I have followed your advice and recommendations for more things then I can count, including removing my rear benches and making that a wrap around desk since I work from home as well (Network Administrator). You both are amazing at your thoroughness and detailed descriptions that take pretty much any questions out of not only how to do it, but if it’s worth investing in it. And you always make it fun to watch as well. Thank you again so very much, and I hope one day our paths will cross!

[@FranchiseMarketingSolutions]

Great job guys! Love your videos! Extremely informative and helpful.

[@davidpatch870]

Hey guys.... because of this video I purchased two of these for my AC units in my Jayco Seneca 37HJ.... love them. Thanks for the info!

[@frozenokiewis]

Thank you guys, used the promo code and it worked great. Cannot wait to install it. Your video sold me on this product as I knew the way these were set up made them inefficient and killed airflow out of the vents. Thanks again!

[@patmcdaniel9612]

Really great informational video. Gonna look into getting one for our motorhome. Recently I lined the units with Reflectix and retaped which did help. This item looks to be a game changer.......BOOM !!!

[@VOOODOOO37]

excellent install and demo video, I full-time in FL, and my A/C has been struggling in recent heat waves, will def get this.

[@jethead]

I've been a lurking watcher for a while now. This EXCELLENT video got y'all a subscription and a like. FANTASTIC job. Very well done. I had zero questions and I will be purchasing this for my Rockwood 8311. thank you so much.

[@ChangingLanes]

Thanks for watching! 😊 Welcome to our channel!

[@boogyman718]

Just installed and literally blown away. Well worth the price and install was a piece of cake. 1000% recommend.

[@brucetanner5313]

Installed this upgrade a couple of weeks ago and we just had temps high enough for a day or two to try it out. The increased air movement is wow!! Makes the window shades move a little. Started with an 84 degree inside temp and after about 45 minutes it was down to 77 and cycling properly. It will be well worth the cost. We have a 2nd unit in the bedroom that we run during the day on Hot days with a small fan on the dresser moving air into the living area which helps. The big change will be at night when we only run the main unit. Now the bedroom will be easier to cool with the increased air movement. The one thing I found during installation was after centering the a/c unit I still had a small space between the sides and the duct opening. I added a thin foam strip around the opening on the insert and it fit nice and snug. If you have a ducted unit that this upgrade applies to by all means get it.

[@SteveKarolek]

Great video! I put them in our 2021 Momentum 397TH and love the difference. Confession, I put them in the bedroom and main A/C back in August. I finally got around to doing the garage last Saturday.

[@dogfatheryonker9945]

You two put out the best tech videos. 👍👍

[@Corbatron34]

These are legit! Thank you! Our AC works so much better now!

[@russelminto9836]

Installed mine last weekend at the Texas Un-Rally. Richard and Joanne are wonderful people and very helpful. True RVers not just there to sale participated in all of the events.

[@user-pt3wc1rv7j]

great video thanks just ordered the airflow. werner the v twin biker from vermont. you two are one of the best .

[@HighlanderMikeGolf]

Wow! Looks like a great little upgrade! Wish I would have thought of it!! I could’ve got a couple Indian motorcycles and a new RV!! Awesome job of explaining the RV AC and it’s shortcomings. Thanks for sharing!!!!!

[@michaelprosperity3420]

I love your channel. Your upgrades are great. Love the mo ride before and after video.

[@malbe72]

just found this.... we are now in Houston and this is a must have, not a need. or atleast this is how Im saying it to the wife. yall rock! thank you

[@boricua826]

Just installed those in our Reflection. Holy crap what a difference. We were instantly able to feel how much more air it moves. Did not disappoint!

[@PigBoatFlyer]

Thank you! I watched your installation video and had my AC ready to go when the package arrived. I had it installed in about 40 minutes. The only problem I had was sliding the foam into place because it was very tight around the plastic duct inserts. Mixed up some dish washing liquid, put a light coating on both the foam and the inserts and it just slid right in. Perfect! Buttoned it up and ready for the big test. I have a wind meter and before the install I measured between 7 -9 mph at both ends of my trailer from the ceiling vents. After the install I measured between 18 and 21mph! So breezy it blew the install sheet right off the table! Now my wife is worried it will be getting too cold in the trailer with the AC on. My RV is a 30 foot Starcraft Autumn Ridge 266RKS travel trailer with a 15k Coleman Air Conditioner. Can’t wait for the summer heat to really try it out. Used your discount code and saved a few bucks. Love watching all of your videos! Lee A. Kingman, AZ

[@JaimetheNomad]

Simple yet efficient, great idea! If I were wanting to upgrade just one unit I’d probably pull the trigger now, but for 3 AC’s, my electric heat upgrade takes priority 💪 haha Thanks for the vid!

[@gigigoodwitch8198]

Thanks for this video, very informative. We do enjoy watching y'all.💖

[@joemall9614]

Just ordered my rv airflow! Thank you for the discount code and the excellent video!

[@chemcody5119]

Thanks Chad. I just ordered mine. I told them I heard about their product on your channel and I got 15% off! Thanks guys!

[@mpress60]

This is a great addition. Yes, a little pricey, but this really works. I ordered one a while back and just installed on the front a/c. It will be nice to be able to run the front a/c and push most of the air towards the living area. 15,000 btu a/c puts out way too much air in the small bedroom. Ordered 2 more. Used the Changing Lanes link and CHANGINGLANES discount code. Thanks Chad. Another great video.

[@BNKTG]

I have a new 5rh wheel and I just installed one thanks to your video. My wife and I are going camping for the first time this weekend (in our new one). We haven't even ran the AC yet so we won't have a baseline to compare it to... We're taking your word for it. Thanks for the great video.

[@mememariathesingingshihtzu7274]

One of your best videos guys. Really have learned more from your videos than any others online. Thanks,

[@ChangingLanes]

Ah, thanks!

[@KCInferno]

I normally don’t post comments, but thank you this looks great. Can’t wait to try them out.

[@hnrsolutions5184]

Installed this product last week and EXCELLENT improved airflow. I did have spacing problems with the vertical divider so I totally eliminated this on my Dometic unit. So I just have the bracket with the long lag bolts. Thank you for the video. It gave me the know how and confidence to do it myself.

[@HowToRV]

I have to go and see if ours is capable. I loved the spoiloiler alert and the doggy RV boring you. Good job again guys.

[@TravelsAbound]

Great informative video! It's amazing the difference this invention makes. We loved ours on our 2021 5th wheel and when our new 2022 arrives, I will install them if it doesn't have them. Safe travels yall!

[@Markpatrickrich]

I enjoy your videos and all you tips and information and positive energy thank you 🙏🏻❤️I recently purchased a Laredo fifth wheel prepping for a cross county trip hope to see you out there safe travels 🤙🏻

[@brianhinrichs3550]

I installed this on my last two RV's and is amazing. The difference in air flow is tremendous. Cools faster and much quieter. I would recommend.

[@BretChilcott]

Excellent video. I certainly appreciate your thorough review. Keep up the good work!

[@JarheadAndGingersJourney]

Great addition! Nicely done.

[@ryanhampton8056]

You guys are the best. Love your outtakes. My camper is currently 81^F and its only gotten up to 89^F outside. I was going to purchase some foam board today and fabricated something similar but it looks like I need to spend the money to capitalize on this engineers great product.

[@WallyCarmichael]

That is really cool. 😎 I wish we knew about that for our other TT. We now have a Ceader Creek 5th Wheel - 388RK. Our AC does not have that kind of intake. This makes it so much more efficient and no noise. Our last TT AC was like the one you're showing. It was so loud we could hardly hear each other talk.

[@johnstonw1]

Ordered one for my Mach 3 Plus. Thanks for the discount code!

[@Bobs-bd3yo]

Excellent explanation of the product. I had one installed last year at the Grand Design rally in Quartsite and have been very happy we did. Great people that own the company. Fives stars on the product.

[@joannekasten5635]

Bob, please contact us, either email [e-mail] or call [phone]. Thx!

[@rossbaker9143]

Great video/info! My ac struggles on hot/humid mid-Atlantic days. Hoping this (and proper ac maintenance) are the answer.

[@ronbennett6083]

Great topic. Will be looking into this upgrade in the spring.

[@mattgreven7615]

Can't believe I'm just seeing this! I've seen about a dozen of the blue foam board DIY's. Who'd have thunk--airflow should be aerodynamic. Love your channel!

[@mrhumanvideo]

Hey were you in Phoenix Arizona??? I was driving by and saw a three axle RV and noticed it had cameras and I think it was you guys! When I saw the cameras I figured it's gotta be a KZbinr. Thanks for all you do guys appreciate you!

[@mikeparker8382]

Wow!!! When someone comes up with a idea/product such as this, the RV industry should embrace it and ensure ALL rigs have this. I know u guys said that GD has implemented this into the center AC, but unsure on what units. Come in RV industry, lets get into the 21st century!!! Love you guys content in tutorials and adventures!!!!

[@markdown6441]

This is awesome. I will be purchasing and it will be one of the first mods for 2021 cooling/camping season.

[@bombdawg5916]

Installed it before it got hot here in NE Ohio. Last year our Coleman A/C used to have to run almost continuously on high fan mode when the temps were in the 90's. And, we'd have to run the bedroom A/C to knock the temp down before bed. Now with this installed our A/C runs for a few minutes at a time, at low setting, on even the hottest days. And, we haven't had to run the bedroom A/C at all! Also, it now blows so hard-even on low setting-that it blows the dogs hair around while she's laying on the floor! Awsome product!

[@PigBoatFlyer]

We just spent the weekend in Quartzsite, Arizona, where the temperature was 85 degrees on Friday and Saturday. This was our first trip where we could do a real world test with the RV Airflow installed in our Coleman Mach 15k AC. Prior to the install it took quite awhile to reach the set temp on the thermostat once we plugged into shore power. It was 85 outside and 81 inside when I first powered up the trailer. I set the thermostat to 76 degrees and within 30 minutes the AC shut down and the inside was a cool 76 degrees. That's never happened that quick before. During the day when the AC restarted it only ran a few minutes before it reached the set temp and shut down. It has never done that before either. It used to run quite awhile before reaching the set temp. It also seemed to run a lot quieter because when it ran we didn't have to turn up the volume on the TV like we did before. Needless to say we are both impressed with the great improvement. It works better than we expected and so glad we found this video! Best mod I have made to my trailer since new!

[@jerrywills]

Wow... Kathy & I are full-timers and have followed you guys for years. It's like you're part of our traveling family, haha : ) This episode (as many others) have really helped! We're heading over to get a couple of these new A/C things. Man, not only did you show how great it works and how easily installed it is, but you also went the extra mile to show the airflow differences! I loved that part. So, when are you heading west? We're in Az and would love to meet you both ; )

[@lisamcgrath3132]

This was awesome!!! Thanks Chad & Tara for the video review!!!We have a Forest River Rockwood 5th wheel, so it doesn’t look like they have one yet for our model but we will be watching their website very very closely because we definitely want this product!!!

[@joannekasten5635]

Lisa, contact us at [e-mail] or call us at [phone]. I believe we tested a Rockwood a few weeks ago.

[@_LYD]

I've been RVing full-time for about 3 years looking how to improve the efficiency of the AC. Haven't watched your channel for a while, but I've always enjoyed your methodic approach. Being an engineer for 25 years. This is an awesome example of "KISS" can't wait to check it out and see if our system is compatible and I'm also wondering if I can restrict some of the vents from full port. Thanks for the video. Keep safe and have a good time !!!!

[@PigBoatFlyer]

One installation tip: When inserting the unit and it seems to get stuck, remove it and use a solution of dishwashing liquid and water to coat the foam and the outside edge of the duct covers, the re-insert. Makes it a lot easier.

[@rustyoneil216]

We just bought a Grand Design 2670MK and I was thinking about installing this as an early upgrade. When I opened up the cover to look at my AC box, I noticed that it was already installed. Looking at the website in the link, Grand Design started installing these at the factory in June and I can attest that this is true. Happy surprise!

[@user-mt4zr5kp7h]

Watched another guy too, where he cut out all the vent slats in the ac cover on the roof and replaced them with wire mesh. That alone made a huge difference in his cooling ability. Combined, this would be amazing!

[@machfive916]

Tis is an incredibly well done video.

[@dannycollins3584]

Great video! You guys really explained the hole process. Thank you and keep it up!

[@bradschak]

"LOUD NOISES." I love lamp. Chad, trying to identify your obscure movie quotes during outtakes has become an egg hunt. Great stuff.

[@3mombear]

Recently installed in our GD Solitude 390RK and had a few 90+ days to check it out. I felt cool air flow in areas I hadn't felt before. Totally awesome they work great !

[@ChangingLanes]

Great to hear!

[@chrisengelhardt2592]

Installed yesterday and let me tell you! WOW!! Turned on the ac after install and it blew out so much construction debris from all the vents. 100% worth it. For reference I have two Coleman Mach 15 Air-conditioners on a Arctic Wolf 3770 Suite 43 foot. Thanks for the 15% off too !!

[@kimdagnillo8246]

I love you guys ! I have a Daisy also but she’s 70 lbs . Keep informing us , thank you !

[@user-lr8gf5fx5l]

Thank you for the tip & the video! I ordered 1 & used your code & got a $25.50 discount!!!!

[@terryhaynes1596]

I worked with the RV airflow folks back in July to create the first device for an Arctic Fox Fifth Wheel back in July. Definitely helped!

[@jeffward7502]

I have a 2020 arctic fox 32-5m. D0 you have to order specifically for your brand of unit?

[@terryhaynes1596]

@@jeffward7502 i don’t know, sorry. I suggest you Contact them. The question is If the plenums are identical for the 29-5 (mine) and your 32-5. They will know if anyone else has installed it on the 32-5. If not it is real easy to take a few measurements and find out. They can help you with this. Let me know if you additional assistance. Good luck. Love the 32-5. That is the model I wanted to get. But I’m happy with mine.

[@williammiller442]

Thank you for ALL of your videos!!

[@10aemery]

So cute Tara! Love your glasses!

[@donaldbailey5576]

I watched your video and I thought what a great idea. So I had to go out and look at my AC on my 2018 Coachman Freedom Express. The Furrion AC is already built this way with separate chambers. But it gave me an excuse to wash my filters.

[@brandonhendrick6438]

Saw this video and bought this product. So far seems to be alot better. We'll see this summer.

[@crashweekly7925]

1 Thing I did to my standard AC system not having these Air flow devices was put foil tape over the slider vent on the inside of the cover to keep it from vibrating open and rattling while the units are running. Nothing worse than a rattle while you are trying to watch TV, since those slide vents are now obsolete with the Air flow system it wouldn't hurt block them off, this will prevent accidental opening and recirculation of air back into your unit. My OCD for rattles and noises is always in full effect while driving a vehicle or in an RV, I will not rest until I find the rattle or squeak and have it fixed.

[@bryanzorawowicz1002]

I have been using Swifter sheets in front of the stock ac filters and find that I can see when it's time to change just by looking up, they pull so much dirt out and I don't believe it impedes the air flow very much. Easy to cut them to size. I will be installing the RV Air Flow this spring, very good video!

[@stephenchristian5739]

yep in never ceases to disappoint me when i see how the rv ac (& other things) are made, its really sad in so many ways would have been great had USA had a strict stringent code build for rv's starting in say 2000 since i just bought an 2000 alpinlite 11DX ; ) any way I have a coleman & I guess I'm gonna ad this to my rebuild project, thanks for the info. PS really disappointed you guys didn't sit right in front of ac & around the rv to at least give us a feel for what your FEELING! cooler weather but lets see what you think in 'non numbers way'

[@crossroadscrawfords]

Yeah this is real nice. Starting to see videos where people are making there own and they are saving so much money making there own whole made ones.

[@rvserious8317]

This is going to be a lifesaver for those with only one A/C unit on their 5th wheel this summer. No more sleeping hot.

[@ChangingLanes]

👍

[@abbyosman]

great to see a fellow CVMA and and Indian Rider

[@jimlynch9390]

Here's a way to take some of the frustration out of getting the lag bolts lined up. Buy yourself threaded rod and cut it into two pieces. Install the rods in opposing corners put the box up with two of the lag bolts in the other holes. Then replace the rods with the other two lag bolts.

[@Milesco]

Good tip!

[@chaleurphantom1]

That would be a great addition to the kit.

[@Valkman007]

Been watching you kids for a few years now and just wanted to tell you we just bought a new Grand Design Reflection 5th wheel and they are NOW installing the RV Airflow in the AC units. I took mine apart to check before I ordered one, and WOW it is already installed. Makes a HUGE difference in the cooling and air flow.

[@ChangingLanes]

👍

[@amberalisemc]

Thanks for sharing! Will be looking into it come summer.

[@chuckrussell6792]

It's a good concept and glad you put it out there. The problem with so many KZbin videos is that they aren't planned well nor rehearsed enough. This could have been much more precise and less boring if you would have done in two third the time.

[@kennethshaw8388]

Excellent video. We have a new 2022 Reflection 28BH manufactured in August 2021. Grand Design did a fairly good job with the AC install. I first thought that our single 15,000 BTU Coleman AC unit had the original design, but it actually does have the new plenum box. However, it was poorly installed. There were a few vents that had very little airflow, I could hear turbulence in the system, and the system didn't cool as well as expected. When I took things apart I found that the duct openings didn't fully align with the openings in the Styrofoam box, and the rubber gaskets were all pushed out of place so the seals were less than perfect. There were also several large gaps in the raceway duct openings. I metal taped the gaps in the duct work, fixed the rubber gaskets, and carefully aligned all the openings during re-installation. There was a significant airflow improvement and less noise from air turbulence. Chad, you did a wonderful job explaining and measuring the system and flow improvements. Thanks!