All-in-one units to introduce fresh air from the outside into the residence. The Re-Fresh is specifically engineered to meet building and energy codes that call for ASHRAE 62.2 CFM requirements. The reFresh Full Size Units have set speeds at 40, 100, and 170 CFM (Low, Medium, and High). RF10-160EC, RF10-160EC-ES24V, RF10-160EC-P, and RF10-160EC-P-ES24V models are recognized as the Most Efficient of ENERGY STAR® 2019