Built to provide comfort and efficiency while enduring the harsh elements of a seacoast environment are the Evolution® Series two-stage air conditioner and heat pump with CoastGuard™ protection. The ...

For the smart thermostat I have (an ecobee3), the answer is no. It does support two stage heating and cooling systems, but only a single zone. I think the Nest is the same. I have cheap Honeywell's, ...

A group of researchers in Thailand outlined a new methodology to identify the optimal temperature in two-stage cascade heat pumps using non-azeotropic refrigerants. Through their analysis, the ...

The heat pump market is growing. As new applications spur on new technology, there is a lot for contractors to keep up with, especially in air-source heat pumps. Here is a sampling of some of the ...