Air-to-Air Heat Exchanger

How it Works

KeeptheHeat™ Air-to-Air Heat ExchangerWith the KeeptheHeat™ Air-to-Air Heat Exchanger ventilating air without losing heat is the best solution. Design is the key. The combination of tubes within tubes, correctly calculated heat-transfer area, and turbulent air flow within the unit provides the highly efficient heat transfer. The outside air is heated to within 2°C. to 5°C. of the inside air and is often even warmer than the air at floor level in your shop. As fumes or exhausts rise, the heat exchanger creates a draft at the ceiling level and draws the fumes outside. (Please check your local and Federal requirements regarding air emissions.) As the heat exchanger draws your contaminated building air out, it uses this heat to warm the incoming air. As you know, when the black smoke or contaminated air created in your building starts to cool off and starts coming down, it is much harder to remove. Our system removes this contaminated air before it starts to cool and conserves energy in the process.

The KeeptheHeat™ system consists of a "Y" shaped fan assembly. It works by forcing clean air at 2,000 CFM from the outside into a system of corrugated tubing. This tubing runs through a 20 ft. long exhaust plenum, exits the duct work, and is routed along the ceiling and then down the walls or pillars to floor level. As the incoming fresh air is flowing into the building through the corrugated tubes, an exhaust fan pulls the internal stagnant or contaminated air into the open end of the ventilation duct (this is the same section that the corrugated tubing exits the exhaust plenum), and draws this "bad" air across the corrugated tubing which is then exhausted outside the building. This "bad" air, taken from the ceiling level at 2,000 CFM, warms the corrugated tubing, which then in turn warms the incoming fresh air flowing inside of the tubing. This is how the KeeptheHeat™ system functions as a heat exchanger. It uses the heat that is already present inside of your facility to heat the fresh air coming in from outside. Another way to look at it is heat recycling.

By routing the tempered fresh air down the walls to about 1 meter of floor the lower portion of the building will be clean fresh air forcing the contaminates up to the ceiling. This is an example of displacement ventilation. The result is fresh air delivered to the employee work area where it is most needed. Do to the systems flexibility, you can identify problem areas within the facility and target them to receive the incoming fresh air.

The Distinctive Y-Shape Design - Fresh air is brought into the building at the top of "Y" using a 1 hp turbine fan. The undesirable vapors are pulled through the bottom of the "Y" with a second 1 hp fan. All components are designed for long life and low maintenance. The only parts of the unit that move are the fans. These units can be used year round to keep your work area cooler in the summer by only using the exhausting fan. The motors are variable speed and can be wired for 110 or 220 volt single phase or 208-230/460 three phase.