Thor Forums

[16ACE27]

Originally Posted by Jimbo56

I’ve got a question for you about my Coleman. 1st - it’s a 13,500 btu unit on a 28 ft box. I’ve plugged up the end runs of the ducts, put buttons in the vents to deflect more air out the ducts, got the ducts on the unit open, I’ve got the white wire hanging in the intake air. I’m in Va right now in low 90’s humid heat. Thermostat set to 62 (trying to keep it from cycling). I get 61 degrees out of the nearest duct. I can hang meat after sun goes down. But by noon, in full sun, inside is up to 85. Outside was 95. Still blowing 61 out the duct. What do you think my next move is? Oh, I’ve got reflective silver stuff in all the windows. Pillows in the vents, etc.

Your thoughts would be most appreciative.

Sounds like you've done all the right things and you A/C is working it's A## off but it's just not enough cooling capacity for a poorly insulated RV in the sun.
Parking in the shade helps - but not enough.
Upgrading your 13.5K BTU unit to a 15K BTU unit would help - minimally.
Putting an insulating curtain behind the cab to separate the cab area from the living area may help.
Putting a dump vent in the A/C cover helps - in that local area.

Your biggest relief will be to add a second AC in place of one of your vents. You will double your cooling capacity with another 13.5K BTU unit.