3 ms·
Exterior heat pumps used in humid or below-freezing environments need some kind of defrost mechanism, just like a refrigerator. Otherwise your coils end up clo
by ajross 4y ago
Exterior heat pumps used in humid or below-freezing environments need some kind of defrost mechanism, just like a refrigerator. Otherwise your coils end up clogged with ice and the system stops working. The compression cycle is indeed symmetric, but the second order design constraints are quite different.
- theluketaylor 4y agoModern setups are really good about managing frost buildup and can be more efficient than resistive heat down to -20C. Waste heat from the compressor is often used for the defrost.