Abstract: The present invention provides a connection adapter for use with a flexible or rigid conduit that fluidingly interconnects an intake or exhaust port of a ventilation unit and a conduit. The adapter comprises a unit coupler (10) having a central portion (60) with an aperture (70) and an elongated sleeve (80) aligned with the aperture (70) and extending from the central portion (60). The unit coupler (10) can be secured to a port of a ventilation unit such that the elongated sleeve (80) projects through a port into the casing of the ventilation unit. The adapter also comprises a conduit coupler (20) having a central portion (100) with an aperture (110) and an inner elongated sleeve (120) extending from the central portion (100) that is aligned with the aperture (110) of the conduit coupler (20).

Abstract: A heat recovery ventilator defrost system utilizing a bypass section which supplies warm air in both channels of the heat exchanger to accelerate defrost, continue some ventilation of stale warm air, and recirculate a portion of the stale air flow, so as to warm incoming cold fresh air. When the system is in defrost mode, warm exhaust air to be expelled enters an exhaust inlet port and into an exhaust plenum. Because the air being exhausted (by way of the exhaust fan) through the exhaust plenum is under a positive pressure, the stale air will still be sucked out through exhaust passageway into discharge plenum, but also through the passive non-motorized bypass section into inlet plenum.

Abstract: The present invention provides a proportional control system for use in an HVAC unit within a ventilation system comprising a processing means programmed with an air exchange-defrost cycle. One or more motor speed sensing means are also positioned in the HVAC unit and operatively connected to the processing means and one or more temperature sensing means are positioned in the HVAC unit and operatively connected to the processing means wherein the temperature and motor speed sensors determine the motor speed to be applied during the defrost cycle.

Abstract: The present invention provides a connection adapter for use with a flexible or rigid conduit that fluidingly interconnects an intake or exhaust port of a ventilation unit and a conduit. The adapter comprises a unit coupler (10) having a central portion (60) with an aperture (70) and an elongated sleeve (80) aligned with the aperture (70) and extending from the central portion (60). The unit coupler (10) can be secured to a port of a ventilation unit such that the elongated sleeve (80) projects through a port into the casing of the ventilation unit. The adapter also comprises a conduit coupler (20) having a central portion (100) with an aperture (110) and an inner elongated sleeve (120) extending from the central portion (100) that is aligned with the aperture (110) of the conduit coupler (20).

Abstract: The present invention provides an apparatus for controlling a system which includes a fluid conduit network and at least two motors each drivingly engaged with different fluid movement devices, the apparatus comprising means for providing a speed signal representative of the speed of each motor and means for providing a control signal in response to the speed of each motor. The apparatus also comprises a means for controlling the speed of each motor in response to the control signal wherein each motor speed is controlled for balancing the rate of fluid movement at an input point and an exit point of the system.

Abstract: The present invention provides an adaptable modular assembly for use in adapting the intake and exhaust of air from a heating, ventilation and air conditioning (HVAC) unit containing motors, wherein the intake and exhaust apertures of the HVAC unit can be manipulated. These apertures are pre-cut in a modular frame member so as to establish the location of the intake and exhaust, and any apertures not to be used, are covered with detachable plate members, as required. Channel members can be used in an interior of the frame member, whereby, through manipulation of the placement of the channel members, in conjunction with manipulation of the intake and exhaust apertures of the HVAC unit, the modular HVAC assembly of the present invention can be adapted to facilitate the proper installation of the HVAC unit in different types of buildings.

Abstract: A bypass air filter is provided for attachment to the return air duct of an existing forced air conditioning system. The bypass air filter has a housing that defines a bypass air channel between an air inlet opening and an air outlet opening. The housing attaches directly to the return air duct so that the air inlet and outlet openings connect with complementary openings in the return air duct. This arrangement eliminates the need for bypass air ducting between the return air duct and the bypass air filter. The housing retains an air filter, which bisects the bypass air channel, and a fan for drawing air in through the air inlet opening through the air filter and out the air outlet opening. An upstream baffle extends from the housing into the upstream air flow through the return air duct to direct air into the air inlet opening. A downstream baffle extends from the housing away from the upstream air flow through the return air duct to draw air out of the air outlet opening.

Abstract: A bypass air filter is provided for attachment to the return air duct of an existing forced air conditioning system. The bypass air filter has a housing that defines a bypass air channel between an air inlet opening and an air outlet opening. The housing attaches directly to the return air duct so that the air inlet and outlet openings connect with complementary openings in the return air duct. This arrangement eliminates the need for bypass air ducting between the return air duct and the bypass air filter. The housing retains an air filter, which bisects the bypass air channel, and a fan for drawing air in through the air inlet opening through the air filter and out the air outlet opening. An upstream baffle extends from the housing into the upstream air flow through the return air duct to direct air into the air inlet opening. A downstream baffle extends from the housing away from the upstream air flow through the return air duct to draw air out of the air outlet opening.