Originally Posted by Docsgsxr
CK, how well would one of those 12kbtu split heat pumps heat a bus in the widwest in the winter? I was looking at a 9k and 12k dual unit with the 12 k heating the front part and 9k for the master bedroom. Scenario: February in Cleveland with a well insulated and sealed bus on a pretty moderate windy day......... GO!
If it would work, i would skip the webasto.
I run 3 of those units in my house as heat / cool.. in an ohio winter i wouldnt want it to be the sole source of heat.. while ive run my heat pumps at 0 degrees outside.. they sure dont procudce very warm air and go into defrost cycle frequently.. during defrost you are getrting no Heat to the interior..
for cooling in a moderately insualted bus that you are noit trying to cool down instantly from 100 degrees you will do Ok with a 12 or 15k unit... but for heat I would want the webasto.. because in cleveland it drops below 0 frequently and the heatpump will shut down at some point...
on my heat pumps my highest Heat output rating is at 37 degrees and above... at those temperatures you al most never hit a defrost cycle either which is good... below 37 your output begins to drop off and so does efficiency..