Patent ID: 8033322

Claim:
A split heat recovery thermosyphon run around heat pipe system for transferring heat within heating, ventilating and air conditioning systems without conventionally imposed location restrictions, the transferring being done in a safe, ecological, energy efficient and economical manner, the system comprising, in combination: a room having an inlet register for passing outside air into the room, the room having an outlet register for passing exhaust air from the room, the inlet register and outlet register located adjacent to one another; an air duct assembly including an outside air duct having an open first end adapted to receive outside air and a second end located adjacent to the inlet register, the air duct assembly including an exhaust air duct having a first end located adjacent to the outlet register and an open second end adapted to pass exhaust air to the atmosphere, the second end of the outside air duct being located adjacent to the first end of the exhaust air duct, an outside air passageway through the outside air duct adjacent to the inlet register, an exhaust air passageway through the exhaust air duct adjacent to the outlet register; a thermosyphon run around heat pipe assembly including outside air coils, exhaust air coils with vapor lines and liquid lines coupling the outside air coils and the exhaust air coils, the assembly including a fluid refrigerant in the air coils and the lines, the refrigerant adapted to change state and move between the air coils and the lines for the transfer of thermal energy during operation and use; a control device in the form of a modulating return damper between the inlet register and the outlet register; the outside air coils being positioned adjacent to and in advance of the inlet register in a location such that all of the outside air will pass through the outside air coils and then into the outside air duct regardless of a position of the modulating return damper, the exhaust air coils being positioned adjacent to and following the outlet register in a location such that all of the exhaust air will pass through the exhaust air coils and then into the exhaust air duct regardless of a position of the modulating return damper; and an air filter in the entrance chamber upstream of and adjacent to the outside air coils.