Homeowners can count on this two-stage heat pump to bring reliable heating and cooling to their living spaces. The XR16 heat pump has two speeds and two fan stages, giving homeowners the ability to tailor their system exactly to their current temperature needs, and change settings as frequently as necessary. Plus, at all settings, the XR16 heat pump has a SEER2 rating of up to 16.2 and an HSPF2 rating of up to 8.1, meaning this heat pump is reliably efficient.