Abstract: A heat recovery ventilator includes four rectangular regenerative heat exchangers, two blowers, a rotating air switch all disposed in a compact rectangular housing. The regenerative heat exchangers are made of a pleated HEPA filter material. The HEPA filter material captures at least 99.97% of particles having a diameter greater than 0.3 microns. Alternatively, the HEPA filter material is rated at least 85% Dust-Spot Efficiency percentage as measured by ASHRAE Standard 52.1-1992, Dust-Spot Procedure. The regenerative heat exchangers are stationary with stationary seals between the outside and inside climate. One of the blowers blows a stale airstream out through the heat exchangers; the other blower blows a fresh airstream in through the heat exchangers. The rotating air switch operates in conjunction with the two blowers producing the necessary flow reversal through each regenerative heat exchanger to allow heat and moisture exchange between the stale airstream and the fresh airstream.

Abstract: A heat recovery ventilator includes four rectangular regenerative heat exchangers, two blowers, a rotating air switch all disposed in a compact rectangular housing. The regenerative heat exchangers are made of a pleated HEPA filter material. The HEPA filter material captures at least 99.97% of particles having a diameter greater than 0.3 microns. Alternatively, the HEPA filter material is rated at least 85% Dust-Spot Efficiency percentage as measured by ASHRAE Standard 52.1-1992, Dust-Spot Procedure. The regenerative heat exchangers are stationary with stationary seals between the outside and inside climate. One of the blowers blows a stale airstream out through the heat exchangers; the other blower blows a fresh airstream in through the heat exchangers. The rotating air switch operates in conjunction with the two blowers producing the necessary flow reversal through each regenerative heat exchanger to allow heat and moisture exchange between the stale airstream and the fresh airstream.

Abstract: A high performance, low cost, regenerator/heat enthalpy exchanger matrix or bed. The bed consist of a matrix of tensioned sheets with flow channels therethrough. The matrix is of the parallel plate type with high porosity, and narrow, uniform, unobstructed channels. The bed is ideal for near room temperature regenerator applications. The elastomer bed regenerative heat transfer structures are suitably used in heat and moisture exchangers which are used on humans to reduce moisture and heat loss during breathing.

Abstract: A high performance, low cost, regenerator/heat exchanger matrix or bed. The bed consists of numerous stretched elastomer sheets separated by spacers and stacked. The resulting matrix is of the parallel plate type with high porosity, and narrow, uniform, unobstructed channels. The bed is ideal for near room temperature regenerator applications. The bed may also be used to pump heat or refrigerate, when fitted with a mechanism which allows the stretch of the elastomer sheets to be rapidly increased and decreased periodically.