Abstract: Systems and methods to facilitate controlling operation of a scrubber unit implemented in a heating, ventilation, and air conditioning system. The scrubber unit includes a scrubber housing, which encloses a contaminant filter; and a control panel coupled in a sidewall of the scrubber housing. The control panel includes a controller module, which includes a first module housing that encloses scrubber control circuitry and a first plurality of input/output ports. The scrubber control circuitry communicates with first equipment in the scrubber unit via the first plurality of input/output ports. The control panel includes an input/output module, which includes a second module housing that encloses a second plurality of input/output ports; and a communication bus coupled between the controller module and the input/output module that enables the scrubber control circuitry to communicate with second equipment in the scrubber unit via the second plurality of input/output ports.

Abstract: An air flow rate meter includes a probe housing having a pass-through opening. The air flow rate meter also includes a sensing circuit coupled with the probe housing and positioned at least partially within the pass-through opening. The air flow rate meter also includes an arm coupled to the probe housing. The arm includes a probe-end on which the probe housing is disposed, a mounting-end opposite to the probe-end, and an angled segment extending at a first angle from the probe-end and at a second angle from the mounting-end.

Abstract: A system for controlling air flow is provided that includes a damper disposed on a duct, an energy recovery system disposed within the duct a first predetermined distance from the damper and a controller coupled to the damper by a conductor and to the energy recovery system, the controller disposed within the duct a second predetermined distance from the damper.

Abstract: A single piece roll-formed frame comprising a first channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at a first angle and a lower side extending from the upper side at a second angle, a second channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle and wherein the base section of the first channel and the base section of the second channel are formed from a single piece and intersect to form a third angle, and the upper side of each leg of the first channel overlaps the upper side of each leg of the second channel.

Abstract: A roof hatch for enabling access to a rooftop of a building from an interior of the building includes a curb adapter configured to be disposed over a curb of the rooftop. The curb is formed around an opening in the rooftop that fluidly connects the interior of the building to an exterior of the building. Additionally, the roof hatch includes a cover coupled to the curb adapter by a pivoting member. The cover includes a support extending within an interior length of the cover. The roof hatch includes a gas spring coupled between the support and the curb adapter. The gas spring is configured to apply a force to the support, and the support is configured to distribute the force along the interior length of the cover.

Abstract: A control system, comprising one or more smoke sensors, each configured to measure a level of smoke at a location within a building and to output a smoke level signal based at least in part upon the measured level of smoke. A controller configured to receive the smoke level signals and to control an operation of one or more energy recovery ventilation systems in a first mode of operation to recover energy when the smoke level signal is below a predetermined value and in a second mode of operation to evacuate smoke when the smoke level signal is above the predetermined value.

Abstract: A telescoping rail assembly for a roof hatch includes a bracket configured to couple to the roof hatch, where the roof hatch is configured to provide access to a roof of a building, a post coupled to the bracket and configured to extend from the roof hatch and outward from the roof, and a telescoping rail having a first portion and a second portion, where the first portion and the second portion are slidably adjustable with respect to one another, and where the telescoping rail is disposed along a portion of a perimeter of the roof hatch to enable the telescoping rail assembly to enclose an area that includes the roof hatch.

Abstract: A wireless damper control and test system comprising a wireless controller for communicating with a wireless interface using an identifier whereby actuation timing of a damper actuator is transmitted by signal, the wireless interface connected to a damper to be controlled or tested using the transmitted signal, the wireless controller transmits the signals to the wireless interface for operational verification of the damper and damper actuator, and the wireless interface detects a damper state by contacts mounted on the damper and communicates the damper state to the wireless controller.

Abstract: A damper comprising a tubular duct, a circular blade disposed within the tubular duct and a shaft disposed within the tubular duct, wherein the shaft extends through a hole in the circular blade.

Abstract: A device comprising a fin structure, a vent disposed in the fin structure, a cooling coil disposed in the vent, a light disposed in the fin structure and wherein the fin structure is configured to create a Coanda effect for air exiting the vent.

Abstract: A damper, comprising a plurality of blades, a plurality of blade arms, each blade arm coupled to one of the plurality of blades and a motor coupled to one of the blades and one of the blade arms.

Abstract: A control system, comprising one or more smoke sensors, each configured to measure a level of smoke at a location within a building and to output a smoke level signal based at least in part upon the measured level of smoke. A controller configured to receive the smoke level signals and to control an operation of one or more energy recovery ventilation systems in a first mode of operation to recover energy when the smoke level signal is below a predetermined value and in a second mode of operation to evacuate smoke when the smoke level signal is above the predetermined value.

Abstract: A control system, comprising one or more smoke sensors, each configured to measure a level of smoke at a location within a building and to output a smoke level signal based at least in part upon the measured level of smoke. A controller configured to receive the smoke level signals and to control an operation of one or more energy recovery ventilation systems in a first mode of operation to recover energy when the smoke level signal is below a predetermined value and in a second mode of operation to evacuate smoke when the smoke level signal is above the predetermined value.

Abstract: A variable air volume diffuser and method of operation are disclosed. The system includes an energy harvesting device, a ring-shaped damper and a frame adapted to interface with the ring-shaped damper, wherein the ring-shaped damper is driven by energy harvested from the energy harvesting device.