air conditioning "need to know" stuff

[universalexports]

I've been having a discussion about AC units, and have became aware of a few things,

like no matter how big the AC unit is it will only lower the inside temp about 20 degrees less than the outside temp, (this is partly true)
the truth is, The temperature differential is between the INSIDE temperature and what the temperature just after the evaporator coil is. As the inside temperature drops, so does the exit temperature of the evaporator coil.

some higher end AC units are capable of more of a temp drop than the "average Model" but no matter how much air they move they are limited to the temp drop they can provide, so on a really hot day,a bigger unit will still not be able get the camper down to a really cool temp.

putting the outside of the AC in a shaded area will help with this quit a bit, as opposed to having it in direct sunlight.

this leads me to think about insulation, it is really important to help keep the cool air that was in the camper during the night and early morning, cool,

just interesting info.

[lopo]

This is interesting, and I'm wondering what it might mean in light of our recent threads about installing the window unit in the floor with a "tent" over the evaporator coil, directing the hot exhaust air down and out below the trailer. Obviously the sun isn't on the coils, but . . .

[dawgpound]

It is true about the ambient air temperature. This is why I created the Side Intake Boxes idea and it really cools down the interior of a trailer, because it is recirculating the cabin air and not solely relying on drawing in the hot outside air.

[lopo]

Ross, it's such a no-brainer that maybe you should patent it. And if my handyman doesn't show up tomorrow like he said he would, would someone please give me a list of tools to buy so I can install it myself? I am not happy with depending on someone else to do this, but I don't want to bung up my Compact, either.

[flowergirl604]

Ross, could you direct me to where I can read about your "side intake boxes"? Thanks much!

[dawgpound]

PM sent.

[shastamcnasty]

I was thinking about putting foam board over the existing celing and covering the foam board with new 1/8th inch wood. Do you think that would work for insulation?

[lopo]

What's on your roof? Most of the members are against putting anything on the roof, but the 3 coats of white elastomeric coating I put on my Shasta made a big difference in the inside twmp.

[vikx]

Unfortunately, elastomeric fails, allowing water to creep under. This is why we see roof metal rot.