Air Make-Up Systems
How the System Works
Air makeup units (also known as air-replacement systems) replace contaminated air exhausted from industrial and commercial buildings or paint spray booths, with fresh, heated outdoor air, maintaining a constant leaving-air temperature regardless of the incoming, outdoor-air temperature. Air replacement systems replenish equal amounts of fresh air for every cubic foot of air exhausted.
• Eliminate problems with drafts, stale or contaminated air
• Create balanced building pressure and maintain proper comfort levels
• Introduce make-up air to improve indoor air quality
• 100% fresh air
• 80/20 or variable recirculating airflow
• Cooling and humidity control available
• Curing/bake systems
A direct-fired burner with a turndown ratio of 30:1 that is 100% efficient - all the heat goes directly into the airstream. The high turndown capability allows the flame to adjust to wide, outdoor-air temperature swings throughout heating season. For example, a unit with a maximum temperature rise of 90° in the winter can adjust down to as little as a 3° temperature rise for milder spring and fall weather.
During Spray Booth Operations
A paint spray booth’s exhaust system is removing significant quantities of shop or plant air. A typical 10’ x 8’ x 6’ spray booth may exhaust more than 8,000 cubic feet of air per minute. If replacement air is pulled directly from outside, this volume may be sufficient to cool the interior of the building and may adversely affect the quality of coatings. An air replacement system may be required, using an air replacement unit which supplies conditioned and filtered air to the booth, minimizing temperature variations and removing particulates that compromise finish quality.
In the case of pressurized spray booths, air replacement is introduced directly into the spray booth, eliminating the need for air to be drawn from the facility. This allows for greater control over the temperature and filtration quality in both the facility and the spray booth environment, therefore improving working conditions and lowering overall operating costs.
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