Roof AC with ducts.
Thought I'd pass this, may have been discussed before. I've read many posts about the AC not cooling well enough. These may help (or not).
My Hurricane like many RV's have a rooftop AC (Coleman Mach) that feeds into a duct system when you close the three slide vents which then forces the air into the ductwork. This works well depending on how well the system is sealed once the three vents are closed. A couple of items that you may find helpful.
1) As you know the return air and output air are in the same box. these two sections are supposed to be separated by insulation board and further sealed with duct tape to prevent freshly cooled air from going right back up the return side. In my case this was not done properly and a good bit of cold air was instantly "recycling". Pulled out my handy role of duct tape and taped until I could not feel any cold air coming into the return side.
2) In my case there was also a lot of air escaping around the cover which reduces the pressure needed to force the air into the ductwork and makes a bit of noise. So run your fingers around the outside of the AC unit and check for air leaks. I used clear tape to seal the edges, other may want to do something else.
3) When I first got my MH I looked at the ductwork which is simply a hole cut into the Styrofoam. The hole was ragged and not as large as it could be. So I cut it a little more. This of course created a small amount of Styrofoam "dust" that blew out all the ducts.
4) My unit is prewired for a second unit in the bedroom. Already has the thermostat, wiring, and upon removing the roof vent cover in the bedroom found that the ductwork had already been cut for the non-existent AC unit and cold air was coming out from the front unit. I sealed up those holes.
After doing all of this, it may be psychological, but it seems I am getting much more air out of the ducts.
My Hurricane like many RV's have a rooftop AC (Coleman Mach) that feeds into a duct system when you close the three slide vents which then forces the air into the ductwork. This works well depending on how well the system is sealed once the three vents are closed. A couple of items that you may find helpful.
1) As you know the return air and output air are in the same box. these two sections are supposed to be separated by insulation board and further sealed with duct tape to prevent freshly cooled air from going right back up the return side. In my case this was not done properly and a good bit of cold air was instantly "recycling". Pulled out my handy role of duct tape and taped until I could not feel any cold air coming into the return side.
2) In my case there was also a lot of air escaping around the cover which reduces the pressure needed to force the air into the ductwork and makes a bit of noise. So run your fingers around the outside of the AC unit and check for air leaks. I used clear tape to seal the edges, other may want to do something else.
3) When I first got my MH I looked at the ductwork which is simply a hole cut into the Styrofoam. The hole was ragged and not as large as it could be. So I cut it a little more. This of course created a small amount of Styrofoam "dust" that blew out all the ducts.
4) My unit is prewired for a second unit in the bedroom. Already has the thermostat, wiring, and upon removing the roof vent cover in the bedroom found that the ductwork had already been cut for the non-existent AC unit and cold air was coming out from the front unit. I sealed up those holes.
After doing all of this, it may be psychological, but it seems I am getting much more air out of the ducts.
