rgatijnet1 wrote:
JaxDad wrote:
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.
Obviously that is right. My RV is not completely air tight. As I stated from several years worth of experience, my single hose heat pump has kept our RV comfortable in minus zero temperatures. Bringing in some outside air to keep the inside air fresh is a good thing for us and is a requirement for most residential and commercial AC systems.
I guess we have the best of both worlds, fresh air circulating and warm temperatures inside.
If you love your electric resistant heaters and want to live in stale uncirculated air, fantastic. To each his own. :B
I’m not going to make this a long dissertation, but unless your heat pump is capable of extracting more BTU’s per CFM than than the incoming air contains, you’re losing heat, not gaining it.
A heat pump works by extracting the few BTU’s cool (cold?) air contains per cubic foot and it’s not a high percentage at all.
If it was a high percentage like you describe, nearly every house in America would have heat pumps.