I have two Duo-Therm 15k heat pump penguin AC units on our camper. One is down to 10 deg differential temperature suggesting it is loosing Freon. Compressor currents are nominal or maybe a little low....
Installed the duo-therm Brisk air II's last week. We went camping friday through the holiday and a few extra days. The new AC units worked wonders. They had no problem keeping the coach at 71 degs in the hot Florida sun this weekend. I have noticed but did not measure the air flow is much grater than with the old units. Camping this summer will be much more enjoyable.