In cold-climate ventilation, an exhaust-to-supply air-to-air plate exchanger can frost on the exhaust side when the supply outlet drops below the dew point of the humid exhaust. Frost narrows the channels, raises pressure drop and eventually blocks the core. Knowing when it forms — and which protection strategy to use — keeps the unit efficient […]
Commercial Kitchen Heat Recovery from Exhaust
Commercial Kitchen Heat Recovery: Capturing Energy from Exhaust with Air-to-Air Heat Exchangers Walk into any busy restaurant kitchen at dinner service and you will feel it: a wall of hot, greasy exhaust air being thrown out through the hood, while at the same time the make-up air unit is burning energy to condition cold outside […]
Heat Recovery in HVAC: Cutting Energy with Air-to-Air
Why Ventilation Wastes Energy Buildings need fresh air, but exhausting conditioned indoor air and bringing in untreated outdoor air can waste a large share of heating and cooling energy. In cold weather the incoming air must be heated; in hot weather it must be cooled. Air-to-air heat recovery closes that gap. How Air-to-Air Recovery Works […]
Rotary Heat Recovery Wheels: How They Work and Where to Use Them
Rotary heat recovery wheels: how the rotating matrix recovers 70-90 percent of exhaust energy, where to use them, sizing, maintenance and comparison with plate and heat-pipe recovery.
Heat Exchanger Selection: Plate, Shell-and-Tube, Rotary
换热器是热回收与工艺换热的核心设备。本文对比板式、管壳式、转轮式、气气及微通道换热器的原理、优缺点与适用工况，并给出选型步骤与维护要点，助您精准匹配工况、提升换热效率。
What Is a Good Flow Velocity for an Air-to-Air Heat Exchanger?
The flow velocity selection for an air-to-air heat exchanger depends on the operating conditions, exchanger type, design objectives, and fluid properties. The following are recommendations and typical ranges: Typical flow velocity range Gas velocity: 10–30 m/s. Low velocity (~10 m/s): for pressure-drop-sensitive or energy-saving scenarios. High velocity (~20–30 m/s): for enhanced heat transfer; watch pressure […]