A Make-up air unit is designed to “make up” the air in your interior space that has been removed due to process exhaust fans or other ventilated exhaust systems. This type of HVAC solution pulls in fresh, tempered air (heated or cooled) from outside your building to replace existing air that cannot be recirculated.
A make-up air solution is recommended for buildings where environmental conditions warrant a greater need for ventilation not only to improve the quality of air within the building, but also protect the health of those inside.
As ventilation and exhaust systems remove air from the building, the make-up air unit works in conjunction to find an equilibrium and provide the right amount of air to return into the building
Typical ventilation fans bring in outside air without heating or tempering. If the outside air is 30°C with 85% relative humidity, the air inside will become 30°C with 85% relative humidity. With that, if the outside air is -25°C, the fan is bringing in air that is -25°C as well.
Thanks to a make-up air unit installed by Middleport Mechanical, the -25°C air can be tempered to 10°C. The heating system won’t have to work any harder and energy won’t be wasted either!