The new Ascend Air-Water Heat Pump Model ACX from Trane (140-230 tons cooling, 1500-2500 MBh heating) is a perfect fit for meeting sustainability and efficiency targets for heating or cooling from one electric source, the company says.

The Trane Thermafit air-to-water modular heat pump Model AXM is a fully electric modular unit that owners can scale to match a building’s heating or cooling load.

PM Engineer Columnist John Siegenthaler guest-stars on PBS’ “Ask This Old House.”

As global energy planning moves away from fossil fuels and toward electricity, an increasing number of hydronic heating systems are being supplied by heat pumps. Some use water-to-water heat pumps supplied by geothermal earth loops. Others use air-to-water heat pumps.