The U.S. Department of Energy (DOE) Smart Tools for Efficient HVAC Performance supports the use of wirelessly connected smart diagnostic tools—a suite of digital probes that transmit key HVAC system measurements such as refrigerant temperatures and pressures to HVAC system diagnostics smartphone applications. These tools can help determine whether air source heat pumps, central air conditioners, and other residential HVAC equipment are installed or operating correctly.

How ENERGY STAR Verified HVAC Installation (ESVI) works.