A refrigerant leak management system includes a return inlet assembly and a purge exhaust outlet assembly. The system also includes a sensor configured to detect refrigerant proximate an air handling enclosure of a HVAC unit. The system further includes a controller configured to control the system to drive air from a conditioned interior space of a building into an external environment via the purge exhaust outlet assembly when the sensor detects the refrigerant proximate the air handling enclosure by: actuating the return inlet assembly to close the return inlet assembly, actuating the purge exhaust outlet assembly to open the purge exhaust outlet assembly, and activating a reversible supply fan of the HVAC unit in a reverse direction.

Disclosed is a system for providing temperature controlled storage. The system comprises a housing having a first, second, third and fourth wall in connection with each other, and a ceiling. The ceiling is arranged on top of the walls and is arranged to have at least one slit between the ceiling and first wall, and ceiling and third wall. The system includes a group of cabinets arranged inside the housing. The group of cabinets comprises at least one set of cabinets. The system further includes a compressor unit, for each of the at least one set of cabinets, comprising a first fan and second fan. The first fan is configured to provide cooled air to a respective set of cabinets via a pipe system connected to each of cabinet, and the second air fan is configured to blow heat from the compressor unit to a direction of the first wall.

Disclosed is a system for providing temperature controlled storage. The system comprises a housing having a first, second, third and fourth wall in connection with each other, and a ceiling. The ceiling is arranged on top of the walls and is arranged to have at least one slit between the ceiling and first wall, and ceiling and third wall. The system includes a group of cabinets arranged inside the housing. The group of cabinets comprises at least one set of cabinets. The system further includes a compressor unit, for each of the at least one set of cabinets, comprising a first fan and second fan. The first fan is configured to provide cooled air to a respective set of cabinets via a pipe system connected to each of cabinet, and the second air fan is configured to blow heat from the compressor unit to a direction of the first wall.

Disclosed is a plurality of guide blades configured to guide air discharged through a discharge port, and an air conditioner having the same. The guide blade includes an eddy induction groove that is concaved from at least one surface of the guide blade, and a plurality of protrusions each protruding from an inner surface of the eddy induction groove in the form of a polypyramid, to generate eddy currents of various directions, so that the guide blade may cope with air flow of various flow speeds and wind directions.

An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Air conditioning system and a method for controlling same. The air conditioning system is configured to carry out air conditioning in indoor space, and includes an indoor unit body. The indoor unit body includes a cavity and a heat exchanger arranged inside the cavity. The air conditioning system further includes at least one return air inlet connecting the indoor space to the cavity. The at least one return air inlet includes a first return air inlet, and the first return air inlet is located at a lower portion of the indoor space.

Air conditioning system and a method for controlling same. The air conditioning system is configured to carry out air conditioning in indoor space, and includes an indoor unit body. The indoor unit body includes a cavity and a heat exchanger arranged inside the cavity. The air conditioning system further includes at least one return air inlet connecting the indoor space to the cavity. The at least one return air inlet includes a first return air inlet, and the first return air inlet is located at a lower portion of the indoor space.

A wall mounted heat exchanger including a plurality of panels. Individual panels may include a first end, a second end, a first sidewall, a second sidewall, a first gap disposed along the second end, and a second gap disposed along the second sidewall. A first plurality of panels may be arranged such that first ends of the first plurality of panels are co-planar with second ends of a second plurality of panels and first sidewalls of the first plurality of panels are co-planar with second sidewalls of the second plurality of panels. The first plurality of panels and the second plurality of panels, when arranged, may form a plurality of first inlets from the second gap, a plurality of first outlets from the first gap, a plurality of second inlets from the second gap, and a plurality of second outlets from the first gap.

A common vent application and an independent fan coil are disclosed for improved heating, cooling and water making in a building. The independent fan coil obviates the common boilers and chillers in addition to all the common heating and cooling distribution piping used in known systems. Instead, the fan coils contain all the hydronic heating components and all the components needed to provide AC without the use of common boilers and chilled water systems. The fan coils utilize common vent shaft ducting to exhaust the products of combustion generated for the independent tankless water heater. In addition, the common vent shaft may utilize a negative static pressure environment to exhaust the heat of rejection from the AC portion of the fan coil unit.