Integrated heat recovery ventilator HEPA filter using a HEPA filter material regenerative heat exchanger

A heat recovery ventilator for use in a room, comprising a housing, two blowers, at least two stationary regenerative heat exchangers made of a pleated HEPA filter material, a shaft, a single rotating air switch mounted on said shaft, a motor for driving said blowers and said shaft, one of said blowers for forcing a stale airstream out of the room;

• the other of said blowers for forcing a fresh airstream into the room, said air switch, in use, alternately imparting the stale airstream from one said blower to a regenerative heat exchanger, then imparting the fresh airstream to that same heat exchanger and through said other blower, when said air switch rotates in a 180° turn, wherein said rotating air switch has:
• a first side plate having an opening and having a center shaft aperture, a second side plate having two openings spaced from each other, and a center shaft aperture,
• a single manifold extending from said first side plate to said second side plate, wherein said manifold connects said opening of said first side plate with one of said openings in said second side plate forming a fresh air passageway, and
• a shaft receiving portion extending from said first side plate to said second side plate;
• wherein said rotating switch is disposed upon said shafts, said shaft disposed in said shaft receiving portion, and wherein, in use, the fresh airstream flows from said regenerative heat exchangers through said fresh air passageway and is forced out by said other blower, and wherein said other opening of said second side plate along with a portion of the manifold and a portion of the shaft receiving portion form a stale air passageway from said one blower to said regenerative heat exchangers, for transferring the stale airstream to said regenerative heat exchangers.

A heat recovery ventilator for use in ventilating a room, comprising means for venting a stale airstream of an indoor climate to the outside air, means for supplying a fresh airstream from the outside air of an outside climate, at least two stationary regenerative heat exchangers made of a pleated HEPA filter material and a rotating air switch for transferring the stale airstream to the regenerative heat exchangers from the means for venting the stale airstream of the indoor climate and for transferring the fresh airstream from the regenerative heat exchangers to the means for supplying the fresh airstream from the outside air of the outside climate, said rotating air switch being rotatably mounted and including:

• (a) a first circular side plate having an air flow opening therein,
• (b) a second circular side plate having a pair of air flow openings, said second plate spaced apart and disposed opposed and parallel to said first plate, and
• (c) a single manifold extending from said air flow opening in said first side plate to one of said pair of said air flow openings in said second side plate, said manifold enclosing said air flow opening in said first side plate and said one of said air flow openings in said second side plate and forming a fresh air passage way for transferring the fresh airstream from the regenerative heat exchangers to the means for supplying the fresh airstream from the outside air of the outside climate, said other opening in said second side plate forming a stale air passageway for transferring the stale airstream from the means for venting the stale airstream of the indoor climate to the regenerative heat exchangers;
• and wherein air flows in opposite directions through the same regenerative heat exchanger.