Abstract: The present invention relates to a connection collar for a duct ventilation system and furnace. The connection collar is comprised of a self-guiding and self-locking damper valve, which when positioned becomes part of a completely sealable joint when used with preferably flexible insulated heating pipe. With the adjusting apparatus and locking apparatus completely contained within the connection collar the connection collar forms a vapor barrier when used with the preferable pipe and or furnace. The self-locking and self-guiding apparatus comprises of a spring biassing arrangement and a cone shaped receiver equipped with catch teeth which when engaged mate with teeth circumferentially positioned on the damper apparatus.

Abstract: The present invention relates to a combined furnace and air recovery system. The system is comprised of a furnace housing having an inlet opening for connection to a cold air return duct and an outlet opening connected to a heating duct. A negative pressure compartment is located within the housing and is in communication with the inlet opening. A positive pressure compartment is also located within the housing and is in communication with the outlet opening. A fan is provided, communicating between the negative pressure compartment and the positive pressure compartment. a heating unit is located within the positive pressure compartment.

Abstract: The present invention relates to a core assembly for use in an air-to-air heat exchanger. The core is comprised of a plurality of square plates. Each plate is comprised of a square planar central region; a first pair of opposed edge flanges bent in a first direction with respect to the central region to form approximately 90 degree angle with the central region; and a second pair of opposed edge flanges bent in a direction opposite the first direction with respect to the central region to form approximately 90 degree angle with the central region. The core is formed by the plurality of square plates that are positioned into a stack of parallel plates such that the opposed flanges of one of the plurality of plates is located in contact with and inside mating opposed flanges of a plate directly adjacent thereto, thereby forming a plurality of air passages between adjacent plates such that two perpendicular air pathways are formed in an interleaved orientation.

Abstract: A heat recovery ventilator for use in ventilating a building, the ventilator having a single two-position damper operable such that in one damper position, heat is exchanged between a first flow of fresh air passing through the first path and a second flow of exhaust air passing through the second air path. When placed in the second damper position, fresh air is blocked from entering the ventilator and exhaust air is recirculated, passing through both air paths, and exiting through the fresh air outlet. In this mode of operation, exhaust air is inhibited from exiting through the exhaust outlet due to the relative pressures within the ventilator, thereby inhibiting the formation of a negative pressure within the building.

Abstract: A method of removing, reducing or detoxifying organic pollutants from a fluid, water or air, by contacting the fluid with a photoreactive metal semiconductor material in the presence of ultraviolet light of a wavelength to activate the photoreactive material, is improved by simultaneously contacting the photoreactive material with a substance that accepts electrons and thus inhibits hole-electron recombination. Such substance will be such as to readily accept electrons either from the conduction band or from superoxide ions, and to rapidly dissociate into harmless products.

Abstract: A purifier for water or air removes, reduces or detoxifies organic pollutants therefrom by causing the fluid to contact a matrix having surfaces with which a fixed anatase (TiO.sub.2) or other photoreactive metal semiconductor material is bonded, in the presence of light of wavelength that will activate the material.

Abstract: A purifier for water or air removes, reduces or detoxifies organic pollutants therefrom by causing the fluid to contact a matrix having surfaces with which a fixed anatase (TiO.sub.2) or other photoreactive metal semiconductor material is bonded, in the presence of light of a wavelength that will activate the material.

Abstract: A purifier for water or air removes, reduces or detoxifies organic pollutants therefrom by causing the fluid to contact a matrix having surfaces with which a fixed anatase (TiO.sub.2) or other photoreactive metal semiconductor material is bonded, in the presence of light of a wavelength that will activate the material.

Abstract: A heat exchanger for transferring heat from stale air evacuated from a building to incoming fresh air employs a core made of a stack of spaced aluminum sheets that are joined along opposite edges in an alternate arrangement to define two separate sets of air passages for the respective outgoing and incoming flows, while providing good thermal contact between the two flows. This contact is improved by generating a measure of turbulence in the air flows by forming the sheets with surface nodules. The core is mounted in a frame that can be readily slid into a housing containing fans for generating the air flows. In an alternative construction, each air flow can be caused to travel in series through two parts of each set of air passages, rather than in parallel. This series arrangement has the advantage of reducing the temperature drop across any one part of the core below the total temperature difference between the inside and outside of the building. A machine is also disclosed for manufacturing such a core.