a drehbares W\u00e4rmer\u00fcckgewinnungsrad<\/strong> (also called a thermal wheel or energy recovery wheel) is a regenerative air-to-air device that captures heat from exhaust air and transfers it to incoming supply air as the wheel slowly rotates between the two airstreams.<\/p>\n The wheel is packed with a heat-absorbing matrix. As it turns, the exhaust side warms (or cools) the matrix; when that section reaches the supply side, the stored energy is released to the incoming air. Sinnvoll<\/strong> wheels transfer temperature only, while Enthalpie<\/strong> wheels also move moisture, recovering both heat and humidity.<\/p>\n Well-designed wheels recover 70–90%<\/strong> of available energy, among the highest of any air-to-air recovery method. Enthalpy wheels additionally cut humidification and cooling loads.<\/p>\n Rotary wheels lead on recovery efficiency for high-airflow HVAC. Plate recuperators avoid any leakage (better for hygienic duties), while plate exchangers<\/a> suit liquids. See our industrial heat recovery guide<\/a> for a full system view.<\/p>\n Do wheels mix supply and exhaust air?<\/strong> Quality seals keep streams separate; minimal leakage is specified by the manufacturer.<\/p>\n When choose enthalpy over sensible?<\/strong> When you also need humidity recovery, such as in humid climates or cooling-dominated buildings.<\/p>\n How does a rotary heat recovery wheel work?<\/strong> What is the difference between a sensible and an enthalpy wheel?<\/strong> Where are rotary wheels used?<\/strong> What are the drawbacks?<\/strong>How a Rotary Wheel Works<\/h2>\n
Key Components<\/h2>\n
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Typical Effectiveness<\/h2>\n
Where Rotary Wheels Are Used<\/h2>\n
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Sizing Considerations<\/h2>\n
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Maintenance<\/h2>\n
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Wheel vs Plate vs Heat Pipe<\/h2>\n
FAQ<\/h2>\n
Frequently Asked Questions<\/h2>\n
A slowly rotating matrix absorbs heat from the exhaust stream and releases it to the incoming supply air as each section passes between the two airstreams.<\/p>\n
A sensible wheel transfers temperature only; an enthalpy wheel also carries moisture through a desiccant-coated matrix, recovering both heat and humidity.<\/p>\n
Large HVAC systems, make-up air units, hospitals, laboratories, and industrial drying where high air volumes make their effectiveness and compactness valuable.<\/p>\n
The rotation causes a small carry-over of exhaust into supply air, so they are less suitable where strict separation is required, and they need power and maintenance for the drive.<\/p>\n