rgatijnet1 wrote:
There are PORTABLE heat pumps that have ONE hose and some that have TWO hoses. The two hose units draw air from the outside and exhaust air to the outside and are limited by the outside temperature.
My single hose heat pump DOES NOT draw air from the outside at all, which allows it to operate at any temperature. The single hose is an exhaust and it only exhausts the cold air that it removes from the inside air.
If you are blowing X number of CFM out of your RV that much air must be entering from somewhere also.