Product Guide

Heat-Pump Water Heaters

The best products...

  • Are Energy Star certified
  • Use carbon dioxide as refrigerant
  • Have uniform energy factors (UEF) >4.0 (residential)
  • Have a coefficient of performance >4.0 (commercial)

But watch out for...

  • Gas or electric-resistance water heaters
  • Units not sized appropriately to optimize efficiency and demand

More about Heat-Pump Water Heaters

On-demand Water Heat Goes All Electric with Heat Pumps, CO₂

Intellihot electrifies commercial water heating using heat pumps, CO2 refrigerant, thermal batteries, and no need for water storage.

Thermal Energy Storage Increases Heat-Pump Effectiveness

Combining water-source heat pumps and ice-based thermal storage creates a “battery” that can provide all-electric heating and cooling, even in cold climates. And it qualifies for IRA funding.

Historic HFC Climate Rule Will Slash U.S. Emissions

The Biden administration just finalized one of the most important greenhouse-gas-reduction initiatives in U.S. history.

From Ozone Depletion to Global Warming: The Kigali Amendment

The amendment builds on the Montreal Protocol’s legacy, aiming to reduce greenhouse gas emissions worldwide.