The ECA has trained and certified thousands of workers over the years in air sealing ... You gotta untrain ‘em to train ‘em.” Problems with heat pumps — such as weak heat, sky-high ...

In this case, the dryer heats the air using the heat pump. That causes water in the clothes to evaporate into the air. The heat pump dryer then uses a second loop to cool the air, condensing the ...

Heat pumps warm buildings by absorbing heat from the air, ground, or water. Air-source pumps, for example, suck in outdoor air and pass it over tubes containing refrigerant fluids to produce heat.