A humidifier for use with a forced-air heating system includes a housing assembly including a mounting frame, a panel configured to be movable between a closed position and an open position with respect to the mounting frame, and a cover attached to the panel. The humidifier further includes a water mist spraying unit carried by the panel. The water mist spraying unit includes at least one spray nozzle. When the panel is in the closed position, the water mist spraying unit extends through a main opening formed in the mounting frame and the at least one spray nozzle of the water mist spraying unit is viewable through at least observation windows of the cover and the panel. When the panel is in the open position, the water mist spraying unit is disposed away from the mounting frame and out of the main opening formed in the mounting frame.

A building management system (BMS) includes memory devices having instructions stored thereon that, when executed by processors, cause the processors to perform operations including obtaining a BMS ontology data model defining a plurality of BMS model classes and relationships between the BMS model classes, obtaining a plurality of BMS object definitions including equipment definitions defining a plurality of different types of equipment and point definitions defining a plurality of different types of points, assigning a BMS model class selected from the plurality of BMS model classes to each of the plurality of BMS object definitions, generating a semantic site model by classifying a plurality of BMS objects associated with a building site according to the BMS object definitions and the BMS model classes assigned thereto, and controlling building equipment using the semantic site model.

An HVAC system for a multi-unit building having a riser stack in flow communication with a single unit HVAC system. The single unit HVAC system has a first heat exchanger thermally connected to the riser stack, a second heat exchanger thermally connected to a fluid distribution system within the unit, and a closed loop fluid flow path extending between the first and second heat exchangers. The first heat exchanger exchanges heat between a riser stack fluid in the riser stack and the closed loop fluid in the closed loop fluid flow path and the second heat exchanger exchanges heat between the closed loop fluid and a distribution fluid of the fluid distribution system.

A geothermal heat utilization system includes a well that includes an upper opening, a lower opening, a water chamber capable of storing underground water inside, and a pump provided inside the water chamber and capable of pumping underground water; and a water suction pipe that extends from the pump toward a heat exchanger, wherein the water chamber includes an upper suction valve capable of being opened and closed toward the upper opening and a lower suction valve capable of being opened and closed toward the lower opening, and wherein the geothermal heat utilization system is configured such that, when any one of the upper suction valve and the lower suction valve is opened, the other is closed.

An apparatus that includes a supply duct and a return duct fluidly coupled to the supply duct. A first evaporator is disposed between the supply duct and the return duct. A second evaporator is disposed between the supply duct and the return duct. A fresh-air intake is disposed between the supply duct and the return duct upstream of the first evaporator and the second evaporator. A first plurality of dampers are disposed upstream of the first evaporator. A second plurality of dampers are disposed upstream of the second evaporator. A divider panel is disposed between the first evaporator and the second evaporator. The divider panel directs air egressing the first plurality of dampers across the first evaporator and air egressing the second plurality of dampers across the second evaporator.

An outside air handling unit and method for delivering conditioned air to individual heating/cooling zones of a building regardless of whether heating/cooling in needed. The outside air handling unit includes a liquid supply line which is connected to and draws liquid from a chilled supply line of the building.

A geothermal heat utilization system includes a first well having a first upper opening and a first lower opening, and a second well having a second upper opening and a second lower opening. The geothermal heat utilization system further includes a first pipe, a second pipe, a first heat exchanger, and a second heat exchanger. The geothermal heat utilization system is capable of supplying underground water of an upper aquifer from the first upper opening to the second upper opening via the first pipe, and the geothermal heat utilization system is capable of supplying underground water of a lower aquifer from the second lower opening to the first lower opening via the second pipe.

A modular water based heating and cooling system for providing chilled or heated water to terminal devices in a building to heat/cool individual zones in the building. The system includes a flow control device in fluid communication with a riser chilled water supply line, a riser chilled water return line, a riser heated water supply line, and a riser heated water return line. The flow control device includes first control valves and second control valves. Terminal device supply lines extend from the flow control device and are connected to respective first control valves. Terminal device return lines extend from the flow control device and are connected to respective second control valves. The first control valves and the second control valves cooperate to supply required chilled water or heated water through the terminal device supply lines to terminal devices based on the cooling/heating requirements of the terminal devices.

This air handling unit (1) comprises an enclosure (3) in which air circulates along a flow direction (X), at least one heat exchanger (5) mounted in the enclosure (3), a condensate recuperator (15) placed under the at least one heat exchanger (5), and a support member (13, 19) stationary with respect to the enclosure (3), and which supports the condensate recuperator (15). The air handling unit (1) comprises a stop member (21) attached to the heat exchanger (5), and cooperating with a portion (132) of the support member (13, 19), the heat exchanger (5) is mounted in the recuperator (15), and an ensemble formed by the heat exchanger (5) and the recuperator (15) is blocked with respect to the support member (13) longitudinally to the flow direction (X) during transportation by the stop member (21).

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.