RV Airflow

It looks like a worthwhile mod if you have a Coleman Mach A/C and one of the compatible RV models.

RV Airflow

Awful expensive for pennies worth of plastic. OP, how long have you had it? Does it get your camper cooler than without, or does it simply get to your desired temperature sooner?

The video is greatly oversimplified. I'd have to guess that the majority of turbulence in the system is from the narrow ducts and the poorly designed turns and 90 degree vents.

One of the benefits of the AC dumps is that on a hot day you can open the dumps and cool the main living area more efficiently than the vents that are in the minimally insulated ceiling, baking in the sun. I'd be worried about getting rid of that advantage... but I'm curious about increasing the cooling ability overall.

Did it myself to my Dometic AC using some sheet metal. I noticed the same thing as the inventor, it dumps cold air into a box where it has to bounce around until finding its way to the ductwork. It is really a poor design and using some method to direct the air smoothly to the duct openings helps the flow and speed.

I did that 'mod' 12 yrs ago
Removed chill grille.
Made an 'inverted V' out of coroplast and installed it in plenum
Reinstalled chill grille

Fan room air blows down and splits due to the 'inverted V' directing the airflow out into the ducts
And if you open Chill Grille vents is still blows directly Down

Airflow thru ducts and chill grille was increased....5vr cools down quite well in high temps

Dang...Missed the boat---should have patented 12 yrs ago
I could have been a millionaire
Dang, Dang, Dang

Don't beat yourself up Old-Biscuit. I'm sure this company is buried in some serious debt at the moment. They probably spent or borrowed a million $ to get to this point. Molds are not cheap. It will take some time for them to realize a profit at this price point.

I would be hard pressed to give up my chill grille. It's almost required down here in Texas. One of the main reasons we are winter campers is the AC doesn't keep up and there's not much we can do about it. I would try one of these for $75, but not $175.

Does it work for you? If it does, that's all that matters. :)

This technique helps too if there's gaps where the ceiling panels meet the duct work.

deltabravo wrote:
This technique helps too if there's gaps where the ceiling panels meet the duct work.

I had the same issue in my Keystone Outback. Solved it with duct tape. On top of that, the ends of the ducts were open, blowing air into the ceiling gap. I had to block them off with cardboard.

I open my windows and it gets really cold in my trailer now. lol

Before my AC could not keep up even if the outside temps were only at 80 deg. Now the unit cools nice and the AC cycles during the day. I'm happy with this upgrade but more important my wife is happy!