The HRVH100SE heat recovery ventilator is equipped with a HEPA filter that removes 99.97% of allergens and other microscopic particles in the air, significantly increasing the quality of air inside your home. It is an obvious energy-efficient choice with its ENERGY STAR certification. The BROAN HRVH100SE has a cutting edge blower design, allowing for an ultra-quiet operation which is barely audible at low speed (2.5 sones), equivalent to the sound of a standard refrigerator.Delivers 50 to 104 CFM of balanced ventilation 5 Diameter ports use smaller ducts allowing for easy installation Integrated defrost control allows for a fast and easy adjustment of the defrost duration according to climatic zones Electronic wall control with LCD screen included offers 5 operation modes for optimal performance Removable terminal block to ease wall control connections Blower design gives a ultra-quiet operation at 2.5 sones HVI certified and ENERGY STAR QualifiedColor: Tan Duct Size: 5 Voltage: 120 Weight: 56