Problem: Conventional combustion and make-up air louvers do not perform consistently. Simply having a large opening to the outdoors does not guarantee correct volumes of combustion air. Depending on wind speeds and direction, mechanical rooms may get significantly more or less air than is actually needed. As with chimneys, combustion air openings must be sized based on the combined firing rate of all heaters within the mechanical room. In reality, all heaters rarely if ever operate at the same time. Uncontrolled combustion air can cause problems ranging from frozen pipes to flue gas spillage and flame roll-outs.

Solution: Tjernlund’s modulating combustion & make-up air systems always ensure proper air supply, regardless of the number of heaters operating and regardless of outdoor conditions.