Hi Joe.? First, let me clear up that the mods I listed in these messages were NOT mine.? Other, creative owners, have done these and I was just interested in them.? My apologies if I led anyone to think I created these.
Thanks for showing what you have done to try to improve the airflow.? I had not thought to use PVC schedule 40 pipe.? It certainly would not have the condensation issues that metal would.? I don't have lots of experience with A-frames as I have only had one for the last 3+ years.? I was led to look into how to make the heat pump work better.? Certainly, a 9000 btu A/C should keep a small unit like mine more comfortable.? Last year we were near Big Bend National Park and the temps were in the low 100s.? Our Expedition was not very comfortable.? I have read in these messages about why this can be.? It appears to be a combination of poor insulation, lots of air leakage around the seams, and maybe poor design of the heat pump installation.? I have been able to improve the cooling by inserting 1" backer rod into the roof seam and dormer seams and using several medium size fans to try to get the cool air off the floor and up into the RV.? With the main bed pulled out, it is very difficult to do this.? We have gone not pulling out the main queen bed in hot weather.? One of us sleeps on this bed as a twin size, and the other sleeps on the dinette converted into a bed.
My next step in improving the A/C is to make some mods to the HB9000 air distribution.? With your input, I have now looked at 3 different ways to do this.? I am still working on what I may do.?
The Expedition's installation of the HB9000 provides 3 output ducts through the panel under the main bed, near the floor.? From reading other posts, other models have the same or a similar heat pump, but with only 2 output ducts.? If the heat pumps are the same, it should be possible to add a 3rd duct for the output air.
I am thinking of routing my 3 output ducts so that 2 are along the back of the bed, under the outside dormer wall - and the other at one end of the bed (either at the feet or head). I just need to decide how I will do this, and I appreciate those who have provided some valuable input to the solution.?
