Air-to-water heat pumps work similarly to other air-source heat pumps except that they use water, instead of air, in the distribution system. This means that instead of blowing hot air in the winter to provide heat, air-to-water heat pumps circulate hot water in a radiator or in baseboards to provide heat to a home.  

Air-to-water heat pumps can require fewer interior refrigerant piping connections but because the hot water is delivered at a lower temperature than if it were supplied by a boiler, they can require upgrades of existing radiators and baseboards.  

Unlike typical air-source heat pumps, air-to-water heat pumps have the potential to heat domestic hot water, and they can provide cooling if they are connected to a cooling system that can use chilled water, like a hydronic fan coil.  

Air-to-water heat pumps are not widely available in the United States at this time, but there is growing interest in the technology. 

For more information visit: Energystar.gov 

We’re In This Together

Pledge to reduce your home’s carbon footprint by replacing old systems and appliances with clean energy technologies over time.

Join the Clean Energy Transformation

Let's work together to reduce greenhouse gas emissions from our homes and build a clean energy future for Massachusetts.

GO CLEAN
close-link