I solved my air flow problems
Here's the problem. When the kitchen air handler was turned on, the air would skip over the kitchen vents and come out the ends at the living room and bathroom. The kitchen would call for cooling bu...
Forum Discussion
holstein13 wrote:DSDP Don wrote:That's a great point. I hadn't thought of that. But since I simply stuffed the insulation in there, I guess I could just pull it back out if necessary.
Good fix, but one thought. I think a lot of RV's use this ducting system that runs the length of the coach so that when on 30 amp and only one A/C is available, you can get some A/C to all portions of the coach.
In your situation, 3 A/C's, if you were stuck somewhere on 30 amp, you will have blocked off the ability to provide air to the rest of the coach when running the center A/C unit.
I'm guessing in your coach and how you use it, 30 amp camping is not a common thing....same with us, but others may run into an issue by blocking the ducting to the center unit.
A neat solution by Newmar would be some powered baffles that could be turned on and off if there is limited amperage. These ducting systems are so small and crammed into a roofline, that they're hard to build effective baffling systems. The biggest issue is that there just isn't enough room in the roof of these RV's to make baffling and ducting that works well.
How about a pillow baffle that would deflate when needed on 30 amp? It wouldn't require much room for mechanical systems at all.
Yes, what you did "fixed" the kitchen problem, but Newmars Duct design has been the same for 20 years. Regardless if 1 or 2 or 3 roof AC's. As a Newmar dealer Service tech for 20 years, I have never seen or had such a problem as you found except for my last part of this post. As the other poster stated, you have made your unit a true 3 zone separate system. As he pointed out, you HAVE to have each AC running for your blocked off Zone for that zone to supply cool/heat. While what you did has "fixed" the problem, it is NOT a correct long term fix. You need to contac Newmar and find out what the real problem is as it is NOT correct for a Newmar product. Years ago, Newmar DID have a problem with collapsed ductwork and had to have the complete insulated ductwork replaced on affected coaches. This required removing the roof top (rubber or fiberglass) and removing and installed the new duct assbly's. Also, IF the required roof AC gasket separator is not installed correctly(seperates the intake from the exhaust) then you will get diminished air flow out of the AC. The only way to verify this is to pull the roof AC, have you had any of the roof AC units pulled or replaced? Doug
