Abstract: A ventilation system includes an input side with a blower, an output side, a filter, and a control system linked to the blower for controlling the output of the blower. The control system also includes a static pressure adjustment system having an input pressure sensor located adjacent the filter on the input side and an output pressure sensor located adjacent the filter on the output side. The static pressure adjustment system also includes a microprocessor linked to the input pressure sensor and the output pressure sensor, the microprocessor receiving signals indicating the static pressure on the input side and the output side. Based upon the static pressure on the input side and output side, the static pressure adjustment system determines a measured differential pressure and continuously sends a signal to increase the output of the blower as the measured pressure differential increases.

Abstract: A stepped damper for a vertical column of an HVAC air handling unit is disclosed. The stepped damper includes a series of offset pivoting blades which, when closed, form a continuous slope running to a drain. In this way, the pivoting blades, when closed, form a ramp that functions to direct any fluid, condensation, or moisture down the ramp and toward the drain located at a low point along the stepped damper. The stepped damper of the present invention is adapted for positioning within a vertical column of an HVAC air handling unit, for example, a vertical air intake column, such that the stepped damper sits adjacent the top of the vertical column for preventing undesired objects from entering the vertical column. The present stepped damper is particularly adapted for preventing any fluid, condensation, or moisture from flowing down and into the vertical column.

Abstract: A cooling coil drain pan for an HVAC air handler unit including a base wall with a plurality of side walls extending upwardly therefrom so as to define a pan cavity into which condensation produced by cooling coils of the HVAC air handler unit collects, the base wall is constructed with a triple slope configuration allowing for the flow of condensation collecting in the cooling coil drain pan from a high point along the base wall to a low point along the base wall for the efficient drainage of the condensation and an underside of the cooling coil drain pan includes cavities filled with insulation.

Abstract: A plenum housing includes a plurality of construction panels and a plurality of compression seal groove connectors secured between the plurality of construction panels. Each of the plurality of compression seal groove connectors includes a recess having at least one interior surface with at least one compression seal groove.

Abstract: A cooling coil drain pan for an HVAC air handler unit including a base wall with a plurality of side walls extending upwardly therefrom so as to define a pan cavity into which condensation produced by cooling coils of the HVAC air handler unit collects, the base wall is constructed with a triple slope configuration allowing for the flow of condensation collecting in the cooling coil drain pan from a high point along the base wall to a low point along the base wall for the efficient drainage of the condensation and an underside of the cooling coil drain pan includes cavities filled with insulation.

Abstract: A ventilation system includes an input side with a blower, an output side, a filter, and a control system linked to the blower for controlling the output of the blower. The control system also includes a static pressure adjustment system having an input pressure sensor located adjacent the filter on the input side and an output pressure sensor located adjacent the filter on the output side. The static pressure adjustment system also includes a microprocessor linked to the input pressure sensor and the output pressure sensor, the microprocessor receiving signals indicating the static pressure on the input side and the output side. Based upon the static pressure on the input side and output side, the static pressure adjustment system determines a measured differential pressure and continuously sends a signal to increase the output of the blower as the measured pressure differential increases.

Abstract: A stepped damper for a vertical column of an HVAC air handling unit is disclosed. The stepped damper includes a series of offset pivoting blades which, when closed, form a continuous slope running to a drain. In this way, the pivoting blades, when closed, form a ramp that functions to direct any fluid, condensation, or moisture down the ramp and toward the drain located at a low point along the stepped damper. The stepped damper of the present invention is adapted for positioning within a vertical column of an HVAC air handling unit, for example, a vertical air intake column, such that the stepped damper sits adjacent the top of the vertical column for preventing undesired objects from entering the vertical column. The present stepped damper is particularly adapted for preventing any fluid, condensation, or moisture from flowing down and into the vertical column.

Abstract: A plenum housing includes a plurality of construction panels and a plurality of compression seal groove connectors secured between the plurality of construction panels. Each of the plurality of compression seal groove connectors includes a recess having at least one interior surface with at least one compression seal groove.

Abstract: A thermal barrier double-wall construction panel made up of at least four layers which includes a foam insulation core with exterior and interior surface sides, an inner and an outer liner (or skin), and at least one engineered thermal barrier support structure located between the foam core and one of the liners.