An outdoor unit of an air-conditioner. The outdoor unit has a casing having a front air outlet and at least one air inlet. At least one fan is located in the casing. The outdoor unit is configured such that the at least one air inlet is provided in a top section and or in a bottom section of the outdoor unit when the outdoor unit is installed in an operational position. The outdoor unit is further configured such that the at least one fan is configured to move air from the at least one air-inlet to the front air outlet or move air from front air outlet to the at least one air-inlet.

A heating, ventilation, and/or air conditioning (HVAC) unit includes a heat exchange section having a plurality of panels defining an air flow path through the heat exchange section. The air flow path includes an upstream portion and a downstream portion, the upstream portion has a first cross-sectional area, and the downstream portion has a second cross-sectional area greater than the first cross-sectional area.

An outdoor unit of an air-conditioner. The outdoor unit has a casing having a front air outlet and at least one air inlet. At least one fan is located in the casing. The outdoor unit is configured such that the at least one air inlet is provided in a top section and or in a bottom section of the outdoor unit when the outdoor unit is installed in an operational position. The outdoor unit is further configured such that the at least one fan is configured to move air from the at least one air-inlet to the front air outlet or move air from front air outlet to the at least one air-inlet.

A method and apparatus for a package cassette room air conditioner. The air conditioner may be mounted in a ceiling of a building structure. The air conditioner may include an evaporator unit and a condenser unit. The air conditioner may include a soffit inlet and a soffit outlet mounted in a soffit of a building structure. The air conditioner may include a drain outlet mounted in a soffit of a building structure.

A compact temperature control system is provided for use within a building. The temperature control system may be designed with a floor-saving design that causes a condenser unit (CU) and a fan coil unit (FCU) to be supported at or near the ceiling. The temperature control system may allow for multi-zone temperature control by connecting multiple FCUs to a CU.

A compact temperature control system is provided for use within a building. The temperature control system may be designed with a floor-saving design that causes a condenser unit (CU) and a fan coil unit (FCU) to be supported at or near the ceiling. The temperature control system may allow for multi-zone temperature control by connecting multiple FCUs to a CU.

A building automation system for controlling air quality of an environment inside a building. The system has at least one bioaerosol detector disposed in at least one location inside the building for detection of bioaerosols circulating inside the building, and has a processor in communication with the bioaerosol detector, and configured to a) determine when one or more thresholds of a bioaerosol has been detected, and b) activate building mitigation resources to reduce a level of the detected bioaerosol.

A building automation system for controlling air quality of an environment inside a building. The system has at least one bioaerosol detector disposed in at least one location inside the building for detection of bioaerosols circulating inside the building, and has a processor in communication with the bioaerosol detector, and configured to a) determine when one or more thresholds of a bioaerosol has been detected, and b) activate building mitigation resources to reduce a level of the detected bioaerosol.