A thermal wheel (also known as a rotary heat exchanger, rotary air-to-air enthalpy wheel or heat recovery wheel) is a type of energy-recovery heat exchanger. It is positioned within the supply and exhaust air streams of an air handling system and is used to recover the heat or cooling energy.
The thermal wheel is commonly the largest single component of an air handling unit (AHU). This is because it serves an area covering the height or width of any double-deck AHU and it is therefore often the most difficult component to transfer to site or into the plant room.
Many manufacturers offer a kit-form wheel constructed from segmented sections and a demountable case. The fragile sections require construction by skilled engineers to ensure that fins are not damaged and the wheel is assembled accurately for long-term reliable operation.
Gibbons’ engineers are vastly experienced in the construction of thermal wheels both in workshop conditions and on site, with kit-form wheels built within the confines of the plant room.