Abstract: A heating, ventilating and air conditioning (HVAC) assembly that includes a duct and a coil assembly coupled to the duct. A supply line and return line are connected to the coil assembly. A first hanger assembly encircles the supply line, and a second hanger assembly encircles the return line. A support bracket has a first raised channel with a hole and second raised channel with a hole. A first threaded connector is secured using a square nut located in under the raised channel of the bracket, and a second threaded connector is connected to the threaded hole of the second hanger assembly and the second hole in a raised channel of a bracket and secured using a square nut located in under the raised channel of the bracket.

Abstract: An induction displacement unit is disclosed that includes an induction plenum having first nozzles communicating with a first discharge plenum and second nozzles communicating with a second discharge plenum, a return air plenum and a heating coil disposed between the return air plenum and the first discharge plenum. In addition, the induction displacement unit has a cooling coil disposed between the return air plenum and the second discharge plenum, where the induction plenum is vertically disposed between the heating coil and the cooling coil. The heating coil is disposed in an upper portion of the unit. The first discharge plenum is disposed to induce a substantially vertical discharge, and the second discharge plenum disposed to induce a substantially horizontal discharge.

Abstract: A filter retention system for releasably retaining a filter cartridge in an operable position within air supply and air exhaust systems is comprised of a filter cartridge, filter retainers, mounting frame with integral sealing knife edge and filter alignment brackets. The filter retainers allow for installation and removal of the filter cartridge without the use of tools. The retention system automatically aligns filter cartridges such that an airtight seal is created between the sealant containing groove in the filter cartridge and the sealing knife edge of the retention system.

Abstract: A filter retention system for releasably retaining a filter cartridge in an operable position within air supply and air exhaust systems is comprised of a filter cartridge, filter retainers, mounting frame with integral sealing knife edge and filter alignment brackets. The filter retainers allow for installation and removal of the filter cartridge without the use of tools. The retention system automatically aligns filter cartridges such that an airtight seal is created between the sealant containing groove in the filter cartridge and the sealing knife edge of the retention system.

Abstract: A humidifier for use in a central HVAC duct. The humidifier includes a water delivery system for applying water to an evaporator pad, a drain system for removing excess water that is not evaporated, and a control system employing two temperature sensors directly measuring the temperature of the air before and after the evaporator pad. The control system uses the two temperatures to adjust the water flow across the pad by cycling the water delivery system so that drain water is minimized while maximizing the evaporative capacity of the humidifier thus satisfying the humidification load as quickly as possible with the least amount of drain water. The humidifier may have either an integral fan or a flow-through housing for passing air across the wetted evaporator pad to increase the humidity level of the air.

Abstract: This disclosure relates generally to air handling systems for buildings, more particularly to energy recovery ventilation systems, and specifically to a calculation/estimation of effectiveness which may be used for informational and maintenance purposes.

Abstract: A filter retention system for releasably retaining a filter cartridge in an operable position within air supply and air exhaust systems is comprised of a filter cartridge, filter retainers, mounting frame with integral sealing knife edge and filter alignment brackets. The filter retainers allow for installation and removal of the filter cartridge without the use of tools. The retention system automatically aligns filter cartridges such that an airtight seal is created between the sealant containing groove in the filter cartridge and the sealing knife edge of the retention system.

Abstract: An induction displacement unit comprising an induction plenum comprising a plurality of first nozzles communicating with a first discharge plenum and a plurality of second nozzles communicating with a second discharge plenum, a return air plenum, a heating coil disposed between the return air plenum and the first discharge plenum, a cooling coil disposed between the return air plenum and the second discharge plenum, the induction plenum vertically disposed between the heating coil and the cooling coil, the heating coil disposed in an upper portion of the unit, the first discharge plenum disposed to induce a substantially vertical discharge, and the second discharge plenum disposed to induce a substantially horizontal discharge.

Abstract: A humidifier for use in a central HVAC duct. The humidifier includes a water delivery system for applying water to an evaporator pad, a drain system for removing excess water that is not evaporated, and a control system employing two temperature sensors directly measuring the temperature of the air before and after the evaporator pad. The control system uses the two temperatures to adjust the water flow across the pad by cycling the water delivery system so that drain water is minimized while maximizing the evaporative capacity of the humidifier thus satisfying the humidification load as quickly as possible with the least amount of drain water. The humidifier may have either an integral fan or a flow-through housing for passing air across the wetted evaporator pad to increase the humidity level of the air.

Abstract: A shape memory alloy (SMA) actuator for engaging and actuating a device. The actuator includes an engagement mechanism, a bias element, and a SMA object(s). The SMA actuator may automatically and passively transfer to a backup or redundant feature that resets or extends the actuator's operational life. In one embodiment, the SMA actuator includes an additional SMA object(s) that replaces the primary SMA object(s) in the event the primary SMA object(s) breaks. The SMA actuator may also be configured to apply a dynamic stress to the SMA object during transition of the object to modify the transition temperatures of the object. The SMA actuator may be part of a fluid distribution system, such as a heating, ventilation, and air conditioning (HVAC) system and used to control the flow of fluid, such as air, from the distribution system.