These systems provide heated air to a space by using a heat exchanger to separate the combustion process from the air stream. The combustion of natural gas heats the heat exchanger, and the air circulated by the handler passes over this heated surface, increasing its temperature. A common application is in large commercial or industrial settings where significant heating capacity is required, and maintaining air quality is paramount.
Utilizing this type of heating method offers advantages in terms of air quality and safety. By preventing direct contact between combustion byproducts and the supply air, indoor air quality is improved. Historically, direct-fired units were common, but concerns regarding air contamination led to the development and increased adoption of these separate combustion heating solutions. The separation ensures a cleaner, healthier, and more controlled environment.
