Heat recovery captures energy from exhaust air, process streams or flue gas and reuses it — cutting HVAC and process energy by 20–70% depending on the application.
HRV vs ERV
Heat-recovery ventilation (HRV) transfers heat only; energy-recovery ventilation (ERV) also transfers moisture, useful in humid or very dry climates.
Heat exchanger types
- Plate (fixed-plate): simple, no moving parts, common in HVAC and small industry.
- Rotary (wheel): higher effectiveness, transfers humidity, needs a purge sector to limit cross-contamination.
- Heat-pipe / thermosiphon: passive, good for electronics and small enclosures.
- Run-around coil: separates airstreams for hygiene-critical sites.
Sizing & effectiveness
Specify based on airflow (m³/h), temperature difference and required recovery efficiency (typically 60–85%). Pressure drop must stay within fan capability.
Industrial use
In industry, waste-heat recovery feeds preheating, drying or absorption chilling. See our Chinese 工业热回收 section for equipment details.
Frequently Asked Questions
What is a typical payback for HRV?
In cold climates with long heating seasons, HRV/ERV payback is often 2–5 years through reduced heating energy.
Plate or rotary heat exchanger?
Plate is cheaper and simpler; rotary achieves higher effectiveness and humidity transfer but needs maintenance.