A sorbent cartridge retention frame configured for use in an air scrubbing system comprising a first inlet side, a second outlet side, a plurality of compartments each configured to hold a solid-sorbent material, a plurality of respective walls arranged to form and separate the plurality of compartments, a first permeable membrane arranged to cover the first inlet side, a second permeable membrane arranged to cover the second outlet side. The first and/or second permeable membrane are configured for affixation to respective ends of the walls through a process of melting and solidification of the wall material such that wall material bonds with the membrane material.

A zoning system for a heating, ventilation, and/or air conditioning (HVAC) system includes a temperature control device configured to monitor a temperature in a zone of a structure for conditioning by the HVAC system and configured to send a wireless control signal including data based on the temperature, and a damper actuator configured to be associated with the zone and configured to adjust a position of a damper to control an airflow into the zone, where the damper actuator is configured to receive the wireless control signal from the temperature control device and configured to adjust the position of the damper based on the data.

A method for controlling a variable refrigerant flow (VRF) system includes applying a time window to sensor data associated with the VRF system, the sensor data including input data points and having a first resolution, wherein applying the time window to the sensor data isolates a subset of the input data points; applying a timing weight to one or more input data points in the subset of the input data points to generate corrected data points having a second resolution higher than the first resolution; creating a virtual sensor and mapping the corrected data points to an output of the virtual sensor; and controlling the VRF system based on an output of the virtual sensor. The use of virtual sensors with a higher resolution than corresponding physical sensors in this manner allows for existing physical sensors to be used while improving performance of the VRF system.

An HVAC system is described having components of a variable refrigerant flow (VRF) outdoor compressor unit connected to an indoor fan coil unit. The indoor fan coil unit supplies air to ducts that condition a plurality of zones. Each zone has a volume modulating air damper that can maintain a predetermined volume of air flowing through it. As the dampers for some zones vary between open and close positions, the air pressure in the ducts changes. The volume modulating dampers compensate for these pressure changes, ensuring that only the predetermine volume of air is passing into the zones. By regulating the volume of into each zone, the volume modulating air dampers can restrict the air volume through the fan coil causing the outdoor unit to reduce compressor speed, thereby saving energy.

An HVAC system is described having components of a variable refrigerant flow (VRF) outdoor compressor unit connected to an indoor fan coil unit. The indoor fan coil unit supplies air to ducts that condition a plurality of zones. Each zone has a volume modulating air damper that can maintain a predetermined volume of air flowing through it. As the dampers for some zones vary between open and close positions, the air pressure in the ducts changes. The volume modulating dampers compensate for these pressure changes, ensuring that only the predetermine volume of air is passing into the zones. By regulating the volume of into each zone, the volume modulating air dampers can restrict the air volume through the fan coil causing the outdoor unit to reduce compressor speed, thereby saving energy.

A cooling and ventilation outlet is described, including a shell configured to connect to an HVAC duct and an inner body that may be securely attached within the shell such that air from the HVAC duct passes through the inner body. The inner body may include: a directable air output nozzle, a first actuator configured to control a direction of the nozzle, an adjustable damper, a second actuator configured to control airflow through the inner body by actuating the adjustable damper, an indicator that may include at least one controllable visual element, a pressure sensor configured for use in determining airflow through the inner body, and circuitry including a network interface. The circuitry is configured to accept commands over a network, to accept readings from the pressure sensor, and to control the first actuator, the second actuator, and the indicator.

A cooling and ventilation outlet is described, including a shell configured to connect to an HVAC duct and an inner body that may be securely attached within the shell such that air from the HVAC duct passes through the inner body. The inner body may include: a directable air output nozzle, a first actuator configured to control a direction of the nozzle, an adjustable damper, a second actuator configured to control airflow through the inner body by actuating the adjustable damper, an indicator that may include at least one controllable visual element, a pressure sensor configured for use in determining airflow through the inner body, and circuitry including a network interface. The circuitry is configured to accept commands over a network, to accept readings from the pressure sensor, and to control the first actuator, the second actuator, and the indicator.

Proposed a gas heat-pump system including: a compressor compressing refrigerant and discharging the compressed refrigerant; an engine providing a drive force to the compressor; a radiator that cools coolant which is heated while passing through the engine; an indoor heat exchanger causing heat exchange to occur between indoor air and the refrigerant and thus cooling or heating an indoor space; an outdoor heat exchanger condensing the refrigerant; a four-way valve switching a flow direction of the refrigerant in such a manner that the refrigerant discharged from the compressor flows to the outdoor heat exchanger in a cooling operation mode and flows to the indoor heat exchanger in a heating operation mode; and a hot-water storage tank causing the heat exchange to occur between stored water and the refrigerant, and thus cooling the refrigerant in the cooling operation mode and heating the refrigerant in the heating operation mode.

An electrically conductive plastic (ECP) material can be used to heat water in a reservoir of a respiratory humidifier to encourage heating and/or humidification of gases passing through the respiratory humidifier. The electrically conductive plastic material can at least in part overmould the base and/or walls of the chamber and/or the reservoir of the respiratory humidifier. The reservoir can also partially or fully be formed from the electrically conductive plastic material. Furthermore, the humidification system can be configured to create substantially equal or differential heating of water in the reservoir.

A building management system includes (i) one or more building systems including equipment configured to serve one or more spaces in a building and (ii) one or more circuits. The one or more circuits are configured to receive an input to invoke a control strategy to modify a condition of the one or more spaces; define an output of the control strategy where the output relates to a modification that impacts at least one of a location, an equipment type, or a point type; perform a query to identify one or more points associated with the output where the one or more points are defined in terms of at least one of the location, the equipment type, or the point type; and automatically modify one or more values of the one or more points to implement the control strategy.