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Air-to-Air Heat Exchangers & Heat Recovery · Since 2005

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Heat Recovery for Semiconductor and Electronics Cleanrooms

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Applications

Heat rejection under strict cleanliness

Semiconductor and electronics cleanrooms maintain ultra-clean, tightly controlled air, and the process equipment generates significant heat. Cooling that air while preserving cleanliness is energy-intensive; air-to-air recovery can reject heat to an external loop without ever mixing the clean and ambient airstreams.

Suitable exchanger types and how they work

Sealed plate exchangers and heat-pipe cores are favored because they move heat with no fans on the device and zero leakage between loops. Indirect evaporative cooling adds a water side for very low supply temperatures while keeping the clean loop isolated.

Design considerations for cleanrooms

Leakage between the clean and external loops must be essentially zero — specify IP-rated, sealed cores. Use materials compatible with cleanroom air quality, monitor pressure drop on the fan side, and size for peak equipment heat density. Access for certified cleaning protects the controlled environment.

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Heat Exchanger for Commercial Laundry and Tunnel Drying

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Applications

Energy in laundry exhaust

Commercial laundries, tunnel washers, and industrial dryers exhaust large volumes of hot, moisture-laden air. That latent and sensible heat is a major utility cost; recovering it for make-up air or water preheat directly lowers gas and electricity use.

Suitable exchanger types and how they work

A sensible plate exchanger recovers heat from the dryer exhaust to preheat incoming air (or, via an air-to-water loop, the wash water). Where exhaust and make-up paths are separate, a run-around coil links them without mixing. A heat pipe core suits compact, vertical installations.

Design considerations for laundry

The exhaust is humid and can carry lint and detergent residue. Use washable, corrosion-resistant plates, fit lint filtration upstream, and provide condensate drainage. Keep pressure drop low for the dryer fans, and ensure the recovered heat has a clear use (air or water preheat) so savings are realized.

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Heat Recovery for Greenhouses and Agriculture

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Applications

Wasted heat in protected agriculture

Greenhouses and indoor agriculture facilities vent warm, humid air to control temperature and CO2, especially in cold weather. That vented air carries substantial energy; recovering it preheats the incoming fresh air, reducing heating cost and avoiding cold drafts that stress plants.

Suitable exchanger types and how they work

Plate air-to-air exchangers recover heat between exhaust and supply with no mixing, protecting crop air quality. An enthalpy core can also move moisture, useful in dry-climate greenhouses. Our greenhouse heat-recovery guide covers crop-specific points.

Design considerations for agriculture

Greenhouse air is humid and can carry pesticides or salt from irrigation; choose washable, corrosion-resistant plates and provide condensate drainage. Size to the ventilation rate, add a summer bypass, and keep pressure drop within the existing fan capacity so the recovery does not fight the climate system.

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Heat Recovery for Mushroom Growing Rooms

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Applications

Climate control for cultivation

Mushroom growing rooms run at controlled temperature and high humidity, with frequent fresh-air exchanges that would otherwise dump conditioned air. Recovering heat and moisture from the exhaust reduces both the heating and the humidification load while keeping the crop environment stable.

Suitable exchanger types and how they work

Plate exchangers with the two streams fully separated prevent cross-contamination of the growing air. An enthalpy (ERV) core additionally transfers moisture, directly cutting humidification demand. A counterflow plate gives the best recovery for the cold-air exchanges of winter.

Design considerations for growing rooms

The air is humid and can carry spores and CO2, so specify washable, corrosion-resistant plates with condensate drains and easy access for sanitation. Manage defrost in cold seasons, keep pressure drop low for the room fans, and size the unit to the ventilation rate the crop schedule requires.

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Heat Exchanger for Industrial Process Exhaust

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Applications

Hot, corrosive process streams

Many industrial processes — petrochemical, chemical, and general manufacturing — exhaust hot gas that is often acidic, salty, or particle-laden. That heat is too valuable to waste; recovering it for combustion air, make-up air, or another process stream lowers fuel consumption and emissions.

Suitable exchanger types and how they work

High-temperature stainless or alloy plate exchangers recover sensible heat from the process exhaust to preheat incoming air. Where streams are separated by distance, a run-around coil links them with a pumped loop and guarantees isolation. A heat pipe core suits vertical, no-moving-part duties.

Design considerations for process duty

Corrosion is the dominant risk: choose alloys rated for the actual gas composition and dew point, provide condensate management, and allow for thermal expansion. Plan cleaning access for fouling, verify pressure drop against existing fans, and ensure no cross-leakage contaminates a clean process stream.

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Heat Recovery for Paint and Coating Booth Exhaust

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Applications

Warm exhaust from finishing booths

Spray-paint, powder-coat, and electrocoat booths exhaust large volumes of warm air carrying solvent or powder. Venting it wastes both heat and, in winter, forces the make-up air system to reheat from cold. Recovery preheats incoming air and reduces the heater load.

Suitable exchanger types and how they work

Stainless plate air-to-air exchangers preheat the make-up air using the booth exhaust, with the streams fully separated so no overspray or solvent crosses to the supply. A counterflow plate maximizes effectiveness; a run-around coil is used when booth and make-up units are distant.

Design considerations for paint booths

Exhaust can carry solvent vapor and particulate, so use cleanable stainless plates, provide condensate and drainage, and keep surface temperatures within safe limits for the solvents present. Design for frequent cleaning, confirm pressure drop against the booth exhaust fan, and never allow cross-leakage that could concentrate solvent on the supply side.

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Heat Exchanger for Heat Pump Drying

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Applications

Closed-loop, low-temperature drying

Heat-pump drying uses a refrigerant cycle to heat and dehumidify air in a closed loop, which is far more efficient than venting hot air to atmosphere. Air-to-air exchangers inside the loop recover heat between the dehumidified supply and the humid return, raising the effective COP of the dryer.

Suitable exchanger types and how they work

A sensible plate exchanger between the dry supply and wet return air recovers the condenser’s heat before the air passes the evaporator again. Where two airstreams are separated by the cabinet, a heat pipe core moves energy with no moving parts. Counterflow plates give the highest recovery.

Design considerations for heat-pump loops

The airstream is humid and often slightly corrosive from process off-gassing, so specify corrosion-resistant, washable plates and condensate management. Keep pressure drop low to protect the refrigerant fans, and ensure the recovered heat is actually reused in the loop rather than dumped. Match the exchanger to the dryer’s operating temperature band.

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Air-to-Air Heat Recovery for Fresh-Air (HRV/ERV) Systems

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Applications

Ventilation without the energy penalty

Modern commercial buildings bring in large volumes of outdoor air for indoor air quality, but heating or cooling that air is a major load. Air-to-air heat recovery vents stale air while transferring its energy to the incoming fresh air, satisfying ventilation codes without a large heating or cooling penalty.

Suitable exchanger types and how they work

Plate heat-recovery ventilators recover sensible heat only; energy-recovery ventilators (ERVs) add a desiccant or membrane layer to also transfer moisture. Rotary enthalpy wheels recover both and suit humid climates. Our deep selection guide compares them in detail.

Design considerations for buildings

Size the recovery device to the outdoor-air fraction, not total airflow, to maximize payback. Provide a summer bypass, manage condensate and defrost in cold climates, and respect ASHRAE 62.1 ventilation rates. Choose the core material for the building’s air quality and maintenance expectations.

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Heat Recovery for Herbal and Pharmaceutical Drying

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Applications

Gentle, controlled drying

Traditional Chinese medicine herbs, flowers (honeysuckle, chrysanthemum), and other botanical or pharmaceutical materials are dried at controlled, often low temperatures to protect active compounds. The exhaust is warm and humid, and recovering its heat stabilizes the inlet air while cutting energy use.

Suitable exchanger types and how they work

Clean stainless plate exchangers preheat the incoming drying air using the exhaust, with the streams fully separated to avoid cross-contamination of product air. Where humidity control matters, an enthalpy wheel recovers moisture. A sensible vs latent review helps decide if latent recovery is worthwhile.

Design considerations for pharma duty

Material must be cleanable and non-reactive — stainless with smooth, accessible surfaces. Provide condensate drainage, control face velocity to protect delicate material, and allow validated cleaning. Keep pressure drop low so the existing drying fans are not overloaded, and document the recovery performance for process records.

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Heat Exchanger for Food Processing Lines

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Applications

Heat recovery in food production

Food lines — sausage curing, noodle and vermicelli drying, casing (intestine) processing, and snack baking — run warm air that is then exhausted. Recovering that heat for incoming make-up air reduces steam or electric heating cost while keeping the process stable.

Suitable exchanger types and how they work

Hygienic plate air-to-air exchangers are preferred because the two airstreams never mix, so no product odor or particulate reaches the supply air. A counterflow plate maximizes recovery; an enthalpy wheel can also manage humidity in humid products. See our plate selection guide for sizing.

Design considerations for food duty

Hygiene dominates: choose washable, food-grade aluminum or stainless plates, provide clean-in-place access and condensate drains, and avoid crevices. Size face velocity for low pressure drop and plan a summer bypass. Because food air can carry grease or flour dust, schedule cleaning per our maintenance SOP.

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