Which Climate Zone Mandates Heat Recovery? ASHRAE 90.1 §6.5.6.1 Explained If you spec HVAC in the U.S., you have almost certainly been asked: “In which climate zones is energy recovery (heat recovery) required by code?” The short answer is that ASHRAE 90.1 does not mandate recovery in every zone — it triggers it above airflow […]
Data Center Waste Heat Recovery: The Complete Engineering Guide (2026)
Data Center Waste Heat Recovery: The Complete Engineering Guide (2026) Data centers are on track to consume ~1,000 TWh of electricity per year by 2030 (IEA), up from roughly 103 GW of installed capacity today heading toward 200 GW. Almost none of that energy disappears: 90–95% of the electricity a data center draws is converted […]
Liquid Cooling & Immersion Server Waste Heat Reuse
Liquid Cooling & Immersion Server Waste Heat Reuse: Turning 45°C Hot Water into District Heat As rack densities climb with AI training and inference, air cooling is hitting its limit. The industry is shifting to direct-to-chip liquid cooling and immersion — and that shift is a gift for liquid cooling waste heat reuse, because it […]
BESS Thermal Management: Heat Recovery and Cell-Temperature Control
BESS Thermal Management: Heat Recovery and Cell-Temperature Control for Battery Storage Battery Energy Storage Systems (BESS) are being deployed as fast as data centers — often right next to them. But a battery is a thermal device: its life, safety and round-trip efficiency are set by temperature. BESS thermal management is therefore both a reliability […]
Data Center Support-Space Heat Recovery
Wenn Ingenieure über die Wärmerückgewinnung in Rechenzentren sprechen, springt das Gespräch fast immer sofort zum White Space – den Serverhallen mit ihrer enormen, konzentrierten IT-Last. Dort sind die Kilowatt am größten, und dort beginnen die meisten Rückgewinnungsprojekte. Doch ein modernes Rechenzentrum ist ein kleiner Campus, und die Büros, Netzbetriebszentralen (NOC), Labore, Werkstätten, Laderampen und Pausenräume rund um die Server werden ebenfalls ständig belüftet und geben stündlich konditionierte Luft nach draußen ab.…
HRV vs. ERV: Der Unterschied, der den Komfort Ihres Gebäudes bestimmt
Betreten Sie ein beliebiges Lüftungs-Planungstreffen, und Sie hören die Buchstaben HRV und ERV fast austauschbar verwenden. Das sollten sie nicht. Ein Wärmerückgewinnungs-Lüfter (HRV) und ein Energierückgewinnungs-Lüfter (ERV) lösen dasselbe Problem – frische Außenluft einbringen und dabei so wenig Konditionierungsenergie wie möglich verschwenden –, gehen aber mit Feuchte sehr unterschiedlich um, und dieser Unterschied entscheidet über Komfort, Feuchteregelung und sogar die Erstkosten in einem bestimmten Klima.…
Retrofitting Heat Recovery Ventilation into Older Buildings
Older commercial and institutional buildings were rarely designed with energy recovery in mind. They were built when fuel was cheap and ventilation was treated as a simple exhaust-and-make-up-air problem. Today, with tighter efficiency expectations and higher energy prices, those same buildings leak heat through every cubic metre of ventilated air. Retrofitting heat recovery ventilation (HRV) […]
Desiccant + Enthalpy Wheel Combinations for Humid Climates
In hot, humid climates the hardest part of air conditioning is not the heat, it is the moisture. Conventional cooling coils can lower the air temperature, but removing latent load cheaply requires either over-cooling and then reheating, or a separate dehumidification step. A desiccant wheel paired with an enthalpy recovery wheel answers both problems at […]
Where China’s Heat-Recovery Demand Comes From in 2026
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: HVAC Expo Takeaways on 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 […]