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A heat-recovery unit re-uses the air from the building to warm or cool new fresh air. A typical unit features two fans, one to reuse the building air (Return Fan), and the other to bring in fresh air (Supply Fan). What makes a heat recovery unit unique is the heat-exchange core. The core transfers heat from the outgoing stream to the incoming stream in the same way that the radiator in your car transfers heat from the engine's coolant to the outside air. It's composed of a series of narrow alternating passages through which incoming and outgoing air streams flow. As the streams of air move through, heat is transferred from the warm side of each passage to the cold, while the airstreams never mix. Westaire can implement different types of heat-exchangers which best accommodate your air temperature requirements.
| Item | Key Details |
|---|---|
| Core Function | Heat/cold transfer between exhaust air and fresh air; energy-saving ventilation |
| Heat Exchanger Type | Common: Plate heat exchanger, rotary heat exchanger (enthalpy wheel), run-around coil |
| Heat Recovery Efficiency | 60%-90% (varies by exchanger type; plate type: 60%-75%, rotary type: 75%-90%) |
| Air Volume Range | 500-100,000 m³/h (suitable for small offices to large industrial plants) |
| Operating Temperature | -20°C to 45°C (outdoor air temperature; low-temperature models available for cold regions) |
| Air Quality Guarantee | Independent air streams (no cross-contamination); optional filters (G3-H14 grade) |
| Control Features | Automatic temperature sensing, heat recovery switch, airflow regulation |
| Key Materials | Cabinet: Galvanized steel (anti-corrosion); Heat exchanger: Aluminum alloy/Stainless steel |
| Typical Energy Saving | 15%-40% reduction in HVAC operating energy consumption |