Installing Make Up Air Vent

There s a general consensus among those in the know that makeup air is needed any time a kitchen exhaust fan rated over 300 cfm is installed however that s not exactly true.

Installing make up air vent. According to section m1503 4 of the international residential code you should install a make up air system with motorized controls if your exhaust fan is rated at 400 cfm or higher. Make up air vent is the same thing as a fresh air intake vent. In the past if you were planning to avoid installing make up air you were limited to low cfm low design type of hoods. Intake vent for makeup air what height from the ground be aware of blockages randy king who s in need of makeup air in madison wi wrote.

I ve got both a fireplace and a free standing wood heater spaced 15 feet apart from one another in my open kitchen and living area. I m installing skuttle s model 216 6 6 damper control and exterior intake vent. The intake vent needs to exit through. What is make up air and how to install a unit.

There just isn t enough air leaks in the house to provide the make up air so in order for the exhaust fan to do its job we need to provide a duct for make up air. Providing makeup air cec and bsc resources as a general warning on providing makeup air in general you want to let the warm plume of air rising off the cooking surface rise into the hood to be exhausted. The house is so tight 0 39ach 50 that when the range exhaust fan is operating without the make up duct open there is less than 30 cfm being exhausted. Many kitchen fans move air at a rate of over 1000 cfm.

However if your kitchen exhaust vent is whining and sputtering it might be time to install a make up air unit. Kitchen ventilation is vital to the functionality of your unit as a whole and without making up air for the exhaust to use you could be left with some serious damages. Today yale s private hood series comes with act technology offering you a make up air compatible hood selection at 390 cfm. I saw your video on make up air.