If you’ve never heard of a make-up air damper, you’re likely more familiar with range-hoods found in kitchens. Like with the purpose of range-hoods, make-up air dampers are used to circulate and clean air. The difference between the two is that make-up air dampers help pull in outside air and push inside air out, so that the air in the room can be renewed. Range-hoods only suck air out of the room. In the old days, windows were used for ventilating stuffy rooms, like bathrooms and kitchens, which can draw in lots of heat from stoves and ovens. Today, homes are more insulated and energy efficient, which means less air can get inside the home from outside. This can make the air stale and lower quality.
Why Use a Make-Up Air Damper
You’d be surprised to find out how many toxins and contaminations are floating in the air inside of your home. An indoor air quality test could be in stow if you have yet to have one after having your home insulated. The impurities in the air can’t get out because of the insulation and unless you open the windows in each room of your home every day, they are going to be sticking around for a very long time. Breathing in impurities is bad for your health, so with a make-up air damper, you can improve the air quality in your home.
How Make-Up Air Dampers Work
A make-up damper is attached to your range-hood. When you turn on the range-hood, it signals the damper, which then opens and allows fresh air inside. By turning off the range-hood, you close the damper flap. This stops negative air pressure from being created by your exhaust fans. The EPA labeled the most contaminated rooms in the home is the kitchen, due to cooking. The range-hood comes in handy for pushing out the contaminants created by cooking. These contaminants are in the form of vapor and will remain in the air for up to three days before disbursing throughout your home. Range-hoods were made to capture these vapors and make-up air dampers can be used to help eliminate them and bring in fresh air.
In some states, it is required that you have a range-hood that has a rating of 400 CFM or more (measurement of how much air is sucked out per minute). If you don’t, then you will have to install a make-up air damper. Without the damper, the air will attempt to replace the old air with fresh air, but without an open window this won’t be possible, causing backdrafting (when exhaust is drawn in from furnaces and water heaters).
Interested in having a damper installed for your range-hood? Give CA Green Remodeling a call today!