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Old 03-20-2016, 12:54 PM   #1
pitacrew3's Avatar
Newmar Owners Club
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Installing additional A/C vents

Has anyone installed additional A/C vents in the ceiling of their coach? We have 2 13.5 HVAC units on the roof with 2 supplies and 2 returns. The rear HVAC unit is directly over the bedroom. The bedroom doesn't seem to get enough air flow. Does anyone have any tips on installation, where and how?

Wayne and Lisa
2014 Newmar 3103
Toad 2000 Tacoma 4x4
3 pups Eddie, Coco and Bella

Wayne and Lisa Mitchell
2014 Newmar Bay Star 3103
Toad 2000 Tacoma 4WD
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Old 03-20-2016, 01:02 PM   #2
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I would try closing off some of the other vents before adding more to the back area.

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Old 03-20-2016, 01:11 PM   #3
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On ours, same setup as yours, I blocked/sealed off the duct work in the kitchen area, due to we travel with a Parrot, and he likes to be warm. Now the rear AC unit just does the bath/bedroom(Also blocked 2/3's of bathroom vent off to direct more air to bedroom, bathroom is small compared to the bedroom), and the front AC does the living area. Most the time, I set the AC in the bedroom, and the front is set to heat pump(Mine works this way?) or just a small floor heater to keep the front around 75 deg. or so.
On ours, the ceiling duct work runs the entire length of the Coach, common ducts for both units. I just separated them by blocking off the output side duct in the kitchen, first vent in the living area from the bathroom. Has worked well now for years for us.
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
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Old 03-20-2016, 01:20 PM   #4
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Originally Posted by charliej View Post
I would try closing off some of the other vents before adding more to the back area.
The units have a minimum air flow requirement (just like furnaces). Closing off vents can bring them below the minimum and cause the unit's to malfunction.
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Old 03-20-2016, 03:11 PM   #5
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Ours it setup the same way, but our bedroom ends up as the cold zone. We usually close off two registers in the bedroom and only run both airs to initially cool down. Then only run the front air.
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install, vent

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