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
エンジニアがデータセンターの熱回収について語るとき、会話はほぼ必ずホワイトスペース－巨大で集中したIT負荷を抱えるサーバールーム－に飛びます。そこがキロワットが最も大きく、ほとんどの回収プロジェクトが始まる場所です。しかし近代的なデータセンターは小さなキャンパスであり、サーバー周囲のオフィス、ネットワークオペレーションセンター（NOC）、研究室、作業場、積載場、休憩室も常に換気され、毎時調整済みの空気を屋外に排出しています。…
HRVとERV：建物の快適性を決める違い
換気仕様の打ち合わせに入ると、HRVとERVという文字がほぼ同じように使われているのを耳にします。そうであってはなりません。熱回収換気装置（HRV）と全熱交換器（ERV）は同じ課題を解決します－新鮮な外気を取り入れながら、できるだけ多くの調整エネルギーを無駄にしないこと－しかし湿気の扱いが大きく異なり、その違いが快適性、湿度制御、さらには特定の気候での初期費用を決定します。…
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 […]