AC temp in 5er compared to outside
I've heard that at best you should get an inside trailer temp of about 20 degrees less than outside. I live in Texas. It's 94 outside right now and about 78 in my 5er. I have a 32 foot Montana wi...
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joeburnes wrote:Big Katuna wrote:
You misheard. An AC drops (at best) about 20 degrees across its coils. When you turn it on in a 90 degree rv, the AC starts spewing out 70 degree air
But as the air starts to drop, now the air inside is a mix of 70 and 90 degree air; say 80, so the AC will now be putting out 60-65 degree air.
I have two acs in my 40' DP and can easily get it in the low 70s in full sun on a 100'degree day.
If that is the case, wouldn't you then continuously get lower and lower ac output temps until you hit your desired temp?
90 degree RV. A/c output 70 degrees. Later on, 80 degree RV, a/c output 60 degrees. later on 70 degree rv, a/c output 50 degrees. later on 60 degree rv....etc etc. But in reality, that doesn't happen.
Why?
Because of the heat load. The sun is heating the inside air via the ceiling walls and Windows as fast as the AC can cool.
My two 15000s can take my rv below 70'but I don't set the thermostat that. Low 70s is plenty cool.
The differential is called Delta T. ACs don't cool air. They remove heat. So the colder the air the less heat there is to remove.
If the Delta T is greater than 18-20 degrees, you have a dirty filter or coils. The air is taking a longer time with the coils but volume is reduced.
