THE ECONAIR TWO-STAGE SPLIT SYSTEM GEOTHERMAL HEAT PUMP is now available in two models, the air handling split, and the dual fuel split. The dual fuel works with an existing fossil fuel furnace and ...

The LRP16GE from Lennox Industries Inc. is an Energy Star-certified residential packaged unit designed to deliver consistent comfort and high efficiency with available two-stage heating, two-stage ...

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 ...

An international research team has conducted the first empirical study on retrofitting PV-assisted two-stage heat pump (HP) systems in existing multi-family buildings. The research is part of 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, ...

Energy Star certification is an important distinction HVAC manufacturers aim for their products to achieve. The designation recognizes highly efficient performance, and 2016’s list of the most ...