China’s recovery-equipment boom is not one market — it is four, pulling different products. Understanding the split helps overseas buyers read a supplier’s catalogue. HVAC & new buildings China’s building-energy rules now require all new urban buildings to meet green-building standards, and large or public buildings are pushing energy-recovery ventilation. In the cold north-east, clean-heating […]
CRH 2026: What the World’s Largest HVAC&R Expo Revealed About Heat Recovery
The 37th China Refrigeration Expo (CRH 2026) ran 8–10 April 2026 at the Beijing Capital International Exhibition & Convention Center. With roughly 115,000 m² of halls, 1,041 exhibitors from 30 countries and more than 80,000 professional visitors, it remains the single best window into China’s HVAC&R supply chain. The official theme — “Digital intelligence shapes cooling […]
Estimating Heat Recovery Payback: A Practical Calculator Walkthrough
Before spending capital on an air-to-air heat recovery system, any serious buyer asks the same question: how long until it pays for itself? The answer is not a mystery and it does not need specialist software, a spreadsheet and a clear method give a defensible simple-payback number that survives scrutiny from finance and from the […]
Enthalpy Wheel vs Sensible Wheel: When Moisture Transfer Helps or Hurts
A rotary energy wheel is one of the most effective air-to-air recovery devices available, routinely reaching 70 to 85 percent total effectiveness, but not every application wants what the wheel is selling. The deciding factor is the matrix coating: a plain aluminium wheel moves only sensible temperature energy, while a desiccant-coated enthalpy wheel also transfers […]
Run-Around Coil Systems: Design Rules for Separate Airstreams
When the supply and exhaust ducts are in different parts of a building, or when you need absolute stream separation with no rotating parts, the run-around or coupled coil loop is often the only sensible recovery option. It uses two hydronic coils, one in the exhaust and one in the supply, joined by a pumped […]
Frost and Defrost Strategies for Rotary Energy Wheels in Cold Climates
A rotary energy wheel is exceptionally effective at recovery, but in cold climates that same effectiveness becomes its weak point: the wheel constantly rotates the cold supply side through the warm, moisture-laden exhaust, and below freezing the exhaust condensate freezes onto the matrix and can block the duct. Understanding why wheels frost and how to […]
Swimming Pool Dehumidification and Heat Recovery: Cracking the Condensation Problem
A natatorium is one of the toughest HVAC environments in any building: warm water evaporates continuously, loading the air with vapour that condenses on every cold surface and rots the structure if ignored. Ventilation must remove moisture, not just heat, and the make-up air it pulls in is expensive to condition. The right air-to-air recovery […]
Classroom ERV: Cutting HVAC Energy in Schools Without Sacrificing IAQ
Cramped classrooms with 30 students can blow past 1,000 ppm CO2 within an hour of occupancy if ventilation is weak, and ASHRAE 62.1 sets a minimum outdoor-air rate that, met with simple make-up air, dumps expensive conditioned energy straight out the window in winter. An energy recovery ventilator (ERV) or heat recovery ventilator (HRV) breaks […]
Heat Recovery for Hospital Operating Theatres and Isolation Wards
Hospitals ventilate harder than almost any other building type, and operating theatres and isolation wards sit at the extreme end: 20+ air changes per hour of conditioned air, strict directional pressure relationships, and zero tolerance for contaminated air reaching patients or staff. That intensity makes recovery valuable but also constrains it. This article covers where […]
Pharmaceutical Cleanroom Make-Up Air Heat Recovery: GEP and ASHRAE 90.1 Compliance
Pharmaceutical cleanrooms condition enormous volumes of 100% outdoor air to hold tight temperature, humidity and particulate limits, and that make-up air is the single largest controllable energy drain in a GMP facility. A properly specified air-to-air heat recovery core can hand back 60–75% of the sensible energy in the exhaust before it is thrown away, […]