There is always condensation when a heat pump runs.
The process is the reverse of evaporation.
Evaporation causes heat loss and condensation causes heat gain.
A heat pump does better with higher humidity.
For example, at 80 RH% you get 145,000 btu/hr and at 63% RH, you get 135,000 btu/hr for an UltraTemp 140.
RH = Relative Humidity %.
So, a difference of 17% humidity causes a difference of 10,000 btu/hr in heating capacity.
BTU/HR.....COP..... Air F°....RH%.....Water F°
145,000.....5.8..........80.........80...........80
135,000.....5.6..........80.........63...........80
90,000.......4.0..........50.........63...........80
*Rating in accordance with ARI Standard 1160 (air temp. F° 1% relative humidity/water temp. F°).
