Leading Off: Rescued by Pressure-Enthalpy(PDF)
As the push, via incentives, for air-source heat pumps
and geothermal for colder climates, especially north
of the 49th parallel, increases, we need to look at some
of the developments that are giving heat pumps the ability to
provide increased heating capacities with higher coefficient of
performance (COP) values under low ambient temperatures. read more