Heating Science; Ventilating Vs. Re-circulating Air and Its’ Benefits
So winter is now upon us and you are needing temporary heat, but you are not sure of the best way to heat the area. There are two main ways of heating a building, by using make-up air or re-circulating the air. How do you know which to choose?
Recirculating heating recycles the existing air in the building. As the air is recirculated and heated, it rises, however, the air is centralized in the building and the end result is hot and cold pockets, as the air is not evenly spread. This also results in various temperatures throughout different floors and also a particular space. In addition, this form of heating adds moisture from the heater’s combustion process and as such, moisture and contaminants from the building are retained, which may mean that you may be left with more stale, dirty air, especially on construction sites. If these issues are not of concern, and you’re heating a smaller area, one of the advantages to this type of heating is that you can generate more heat using less fuel, as the heater is re-circulating warm air.
Make-up air heating allows the introduction of controlled amounts of fresh, tempered air from the outside. This drier, fresh air has the ability to absorb moisture and ventilate fumes from the construction process, while providing lower relative humidity levels and dew point temperatures that reduce condensation and minimize mold potential. As all buildings infiltrate or “breathe” when there is a temperature difference between the inside and outside, this controlled mechanical ventilation results in reduced hot and cold spots and more uniform interior and surface temperatures.
For all your heating needs and recommendations on what may work best for your site, reach out to any of our GAL Power locations, 24/7!