WhisperComfort Spot Energy Recovery Ventilator (ERV) offers a revolutionary way to provide balanced ventilation with a ceiling insert ERV. Tightly built homes and buildings minimize passive air leaks. An exhaust-only fan may create negative pressure. WhisperComfort solves this by supplying air to replace exhausted air, helping to balance air pressure within the home. Panasonic WhisperComfort spot ERV uses two 4 inch ducts, one to exhaust stale air and the other to supply fresh air from outdoors. Affordable and easy to install, WhisperComfort is energy efficient and provides fresh ventilated air while maintaining indoor air quality. The WhisperComfort ERV measures 14 inches wide and fits between joists 16" on center. Brackets and screws are provided to secure the unit to the joists on 4 corners. • Electric Supply: 120 volts, 60 Hz • Electric Consumption: 23 watts (high speed) • Mounting Opening: 19.5" x 14.25" • Air Flow: 10 cfm, 20 cfm, 40 cfm • Manufacturer Warranty: 3 years