Installation and maintenance of AC with no lower unit

Bruce Brown wrote:

Mile High wrote:
I haven't been inside of those specific Class As with the AC running, but typically the full ducted systems (supply and return) are heavenly quiet.

I say typically, because the Mach 8 units on our winnebago are not as quiet as some - the low profile units, sitting on a fiberglass roof and sytrofoam insulation tend to make a lot of mechanical noise and vibration.

I wonder if it's more of the newer stuff. Our '00 & '03 were whisper quiet, or '08 has more mechanical noise than the other two. The other two also cooled better.

It might be. Were your earlier ones low profile? I had standard size on my 5er and it was whisper quiet as well.

Mile High wrote:
I haven't been inside of those specific Class As with the AC running, but typically the full ducted systems (supply and return) are heavenly quiet.

I say typically, because the Mach 8 units on our winnebago are not as quiet as some - the low profile units, sitting on a fiberglass roof and sytrofoam insulation tend to make a lot of mechanical noise and vibration.

I wonder if it's more of the newer stuff. Our '00 & '03 were whisper quiet, or '08 has more mechanical noise than the other two. The other two also cooled better.

gutfelt wrote:

Mile High wrote:
I haven't been inside of those specific Class As with the AC running, but typically the full ducted systems (supply and return) are heavenly quiet.

I say typically, because the Mach 8 units on our winnebago are not as quiet as some - the low profile units, sitting on a fiberglass roof and sytrofoam insulation tend to make a lot of mechanical noise and vibration.

have them in mine no vibrations or mechanical noise to worry about for sur; Don't like the heat pumps though for sleeping LOL

Noticed you're back.

Mile High wrote:
I haven't been inside of those specific Class As with the AC running, but typically the full ducted systems (supply and return) are heavenly quiet.

I say typically, because the Mach 8 units on our winnebago are not as quiet as some - the low profile units, sitting on a fiberglass roof and sytrofoam insulation tend to make a lot of mechanical noise and vibration.

have them in mine no vibrations or mechanical noise to worry about for sur; Don't like the heat pumps though for sleeping LOL

I haven't been inside of those specific Class As with the AC running, but typically the full ducted systems (supply and return) are heavenly quiet.

I say typically, because the Mach 8 units on our winnebago are not as quiet as some - the low profile units, sitting on a fiberglass roof and sytrofoam insulation tend to make a lot of mechanical noise and vibration.

thanks, that's great, I would not have to worry about that Dometic inside plastic filter holder breaking every time I touch it.

No, its easy. Once the shroud is off, they are completely workable. There is an inner shell that houses the evaporator and fan. Once that is off you have access to the ducts from above.

Wow, tightening the gasket to just the right compression must be interesting from the roof.

fred42 wrote:
I see coaches like the Tiffin Allegro and Newmar Bay Star have ducted AC systems where the only openings into the living area are the small circular supply and return vents.

How are they installed, maintained, replaced, etc. without the typical large square openings of traditional AC installations? Is there a removable ceiling panel for this?

thanks,

all done on the roof;; there are Mickey mouse foam filters you clean once in a blue moon on the intake ceiling inlets