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Thread: Styrofoam block in A/C unit?
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07-03-2020, 11:10 AM #21
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07-08-2020, 03:30 PM #22
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I decided to be 'different'. I liked the 'shower' option and didn't want to lose that. But what I did was use foam board to in essence, bring down the top of the plenum area closer to the racetrack vent area. Using foam, I reduced the height of the output side thus not allowing the air to turbulate in the box as the box was now shorter with a column the size of the output vent at the top of the plenum. This in theory gives the air less space to move and forces it into the race track venting. My ac cover seemed pretty air tight with the shower piece installed, and I made sure I taped the divider in place, sealed completely around the edges and made sure that when I reassembled the AC cover, there was a tight fit all around. My whole idea was to kind of replicate a small duct from the output of the AC to the racetrack duct work but also leave the dump option available.
Looking at the piece that RVAir has, it seemed to be sort of ducted to the ductwork plus blocked off the 'dump'. So far, my experience has been an increase in air flow through the vents, I lost the 'whistling' that was happening. Time will tell
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07-08-2020, 04:04 PM #23
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I had the same thing. You need to remove those styrofoam blocks so it will vent to the rest of the trailer. Actually our 337 only came with one A/C. When we had the 2nd one added, they didn't take it them out so I opened it up to vent to the rest of the trailer. As always, I would call GD & run it by them first which is what i did. Good luck!
Stephen & Kerri
2020 Reflection 337RLS
2020 F350 4X4 Lariat
Reese Goosebox
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07-08-2020, 04:05 PM #24
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Gabby
2021 315RLTS Hensley Arrow
2021 F250 Crew Lariat GVWR 30k lbs
2019 Imagine 2600 RB (totaled Mar ‘21)
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07-08-2020, 04:43 PM #25
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I literally just installed the aftermarket RV Airflow Systems product that apparently GD is now making stock. Big Difference! Had horrible flow before that. I'd leave the block in your unit
Howard & Molly
2020 Reflection 31MB, B&W Companion 16k Hitch
2014 F350 Lariat 6.7L
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07-08-2020, 05:22 PM #26
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AWESOME! Hey, after I saw the pics of the actual RV AirFlow kit, I got to thinking. What if we added foam to the upper part of the plenum to build it down to almost the level of the racetrack duct entrance? Then you could fabricate a triangular piece that acts as a diverter of the air to the left and right racetrack entrances. From the bottom you build it up with foam board to make the air chamber very small which will force the air into the diverter and into the racetracks.
Here's a rough sketch looking at it from front to back of the trailer (cross section basically).
2017 Ford F450 - our kids call her "Big Red"
2018 Grand Design Reflection 28bh
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07-08-2020, 06:48 PM #27
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07-08-2020, 06:55 PM #28
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07-08-2020, 07:24 PM #29
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07-08-2020, 08:09 PM #30
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I just did my bedroom after doing the living area, the improvement is amazing. https://rv-airflow.myshopify.com/ ... I would say the kit is a bargain based on results. Nice to have a product that meets expectations/claims. A cool RV in SW FL with temps in mid 90's is priceless. If you are a good DIY I am sure you can make something "like" it. later Frank
Frank & Cindy --- S Class Solitude 2930RL-R ---2019 Ram 3500 Cummins 6.7 SRW 4x4 8' bed---Remi & Sage traveling Pomskies ---TST 507 TPMS ... B&W Patriot 18K---3.73 axle ... Predator 3500--Backflip MX4---48 days 2019---51 days camped 2020---***Payload 4394***
Awning for slide out
Today, 08:44 AM in Mods and DIY