Air treatment unit

An air handling unit (AHU) for a heating ventilation air conditioning and refrigeration (HVACR) system includes a housing and a combustion heater disposed within the housing. The housing includes a combustion portion having a first passage and a second passage. The combustion heater includes a heat exchanger tube and a tube support supporting the heat exchanger tube within the combustion portion. The tube support is slidably disposed in the first channel and the second channel. The combustion heater is configured to be slidably detachable from the AHU. An AHU for an HVACR system includes a housing having a fan portion and a fan assembly disposed within the housing. The fan assembly includes a pair of grooves slidably disposed on a pair of guide rails of the housing. The fan assembly is configured to be both slidably detachable from the AHU and uplift detachable from the AHU. 一种用于供暖通风空调和制冷(HVACR)系统的空气处理单元(AHU)，包括壳体和设置在壳体内的燃烧加热器。所述壳体包括具有第一通道和第二通道的燃烧部分。所述燃烧加热器包括热交换器管和在燃烧部分内支撑热交换器管的管支撑件。所述管支撑件可滑动地设置在所述第一通道和所述第二通道