Market Scale and Headroom China's fresh-air (ventilation with energy recovery, ERV/HRV) market reached roughly RMB 40-60 billion in 2024, depending on whether installation and accessories are included. Penetration sits around 12%, far below the 40%+ seen in Europe and North America - leaving substantial long-term headroom as health-awareness and building codes tighten. Manufacturing Hubs Guangdong […]
Desiccant Wheel vs Energy Recovery Wheel: When to Use Which
Energy recovery wheel Transfers both sensible and (if enthalpic) latent heat between supply and exhaust air. Goal: cut HVAC heating/cooling load. Made of aluminum or polymer matrix, sometimes with a moisture-absorbing coating. Desiccant wheel Impregnated or coated with a desiccant (silica gel, molecular sieve, or zeolite). Its job is dehumidification - it pulls moisture from […]
Energy Recovery Wheel Troubleshooting: Common Faults and Fixes
Low effectiveness Cause: wheel not rotating (motor or belt failure), or condensate/fouling blocking the matrix.Fix: verify rotation and speed; wash the wheel with low-pressure water and a mild detergent; confirm belt tension. Frost or ice buildup (cold climates) Cause: exhaust-side temperature dropping below freezing.Fix: enable purge sector, reduce speed, or add preheat. See frost protection […]
Airport HVAC & Energy Recovery: Cutting Terminal Energy Use
Why terminals are energy hotspots Airports are among the most energy-intensive buildings in the commercial sector. Vast terminals run 24/7 with high fresh-air requirements, large glass facades, and constantly moving passenger loads. Heating and cooling the ventilation air alone can account for 40-60% of a terminal's HVAC energy. Air-to-air heat recovery is the single highest-return […]
IECC Energy Recovery Provisions
The International Energy Conservation Code (IECC) is updated on a three-year cycle (2018, 2021, 2024) and is adopted — with or without amendments — by most U.S. states. Its commercial energy-recovery rule lives in Section C403.7, and it is the baseline that many state codes reference. This article summarizes the C403.7 trigger and how the […]
IECC 2024: Energy Recovery Ventilation Provisions Explained
IECC 2024 and the Energy Recovery Link The 2024 International Energy Conservation Code (IECC) addresses commercial ventilation largely by reference to ASHRAE 62.1-2022. Because 62.1 already requires energy recovery on many large outdoor-air systems, IECC 2024 indirectly tightens ERV expectations, in Climate Zones 4 to 8 an energy recovery ventilator is commonly required where a […]
LEED Energy Recovery Credit
Energy recovery contributes to the Energy & Atmosphere (EA) credits that dominate LEED scoring. Whether you register under LEED v4.1 (still open in 2026) or the newer LEED v5 (2025–2030 cycle), ventilation recovery reduces the modeled energy use that the credit is scored on. LEED v4.1 BD+C EA Credit: Optimize Energy Performance is worth up […]
ASHRAE 62.1 Ventilation and Energy Recovery
ASHRAE 62.1-2022 sets the minimum ventilation rates for acceptable indoor air quality, and its requirements directly drive how much outdoor air — and therefore how much recoverable energy — a system must handle. Energy recovery is the bridge between good ventilation and reasonable energy bills. The Ventilation Rate Procedure Section 6.2 uses the Ventilation Rate […]
Sensible vs Total Energy Recovery: How to Pick the Right Exchanger
A practical guide to choosing between sensible-only and total-energy recovery for commercial AHUs, with capital cost ranges and break-even analysis.
Plate vs Heat Pipe vs Rotary Heat Exchanger: Which One to Specify
A practical selection framework comparing plate, heat pipe, and rotary enthalpy exchangers across efficiency, cross-contamination, pressure drop, and lifecycle cost for industrial ventilation projects.