Patent Number: 6,328,095

Title: Heat recovery ventilator with make-up air capability

Abstract: A ventilation system for ventilating fresh air to a conditioned space, thesystem capable of supplying substantially more air to the space than isremoved by the system in order to prevent depressurization inside thespace. Passing through the unit housing is an inflow chamber, an outflowchamber, and a make-up air duct. Two blowers, an intake blower and anexhaust blower, are placed within the inflow chamber and the outflowchamber in order to motivate inflow and outflow currents of air. A damperacts to open and close the make-up air duct. When the damper is in an openposition and the intake blower operates at a higher speed than the exhaustblower the system increases the air pressure within the conditioned space.A heat transfer wheel is disposed within both the inflow chamber and theoutflow chamber to exchange heat between the two currents of air. Apre-heater is placed in the make-up air duct to be used in cold weatherconditions to heat the air which bypasses the heat recovery wheel. Thesystem can also include a desiccant wheel and regenerative heater in orderto provide the function of dehumidification.

Inventors: Felber; Steven M. (Eagan, MN), Kensok; Timothy J. (Minnetonka, MN), Ragland; Ron S. (Minneapolis, MN), Rotering; Leisha J. (Minneapolis, MN), Smith; Timothy J. (Minneapolis, MN), Straate; Russell A. (Plymouth, MN), Terlson; Brad A. (Maple Grove, MN)


International Classification: F24F 3/147 (20060101); F24F 3/12 (20060101); F25B 029/00 (); F24H 003/02 ()

Expiration Date: 12/11/2014