Only 4 AC ducts in 36' TT
We are considering an Outback 323bh. When i saw the unit I was surprised to see there were only 4 AC ducts in the ceiling- 1 in the bunk room, 1 in the living area, 1 in the bathroom and one in the be...
Forum Discussion
Chris Bryant wrote:
My house only has a single outlet in each room, and 4 is the minimum required. As long as the back pressure is within limits, it should be fine.
That 4 is the min that is "PER RUN" and many systems have two runs (i.e. Ducts) so that would be 8 min Page 9 BriskAir ducted system. So your answer IMO lacks a lot of required information and is not applicable in every instance. Your note on back pressure is IMO valid, but most here can't measure that accurately so they have to rely on the number of registers and their size. There are also min free air register flow specs and I believe most A/C systems are at or even below the actual specs and the ever popular concept of closing off registers to redirect the A/C where needed actually reduces the overall cooling. IMO the best way like I have done is to install a couple of registers at the junction of each duct run and the main air plenum and add extra registers above the minimums so some register can be closed off. I now have 12 in my TT with 4 in the bedroom and two at the above mentioned junction so in hot weather I close the registers in the bedroom and close the curtain and my single 13.5 unit does a fine job cooling the rest of the trailer.
If you have a sandwiched type roof adding registers might be extremely easy since a lot of the ducts are cut into the solid insulation and you just have to cut holes in the roof below the duct run and install extra registers.
Larry
