Installing Make Up Air Vent

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.

Installing make up air vent.

The fireplace has a fresh air vent in the hearth. 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. 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. However if your kitchen exhaust vent is whining and sputtering it might be time to install a make up air unit.

Make up air vent is the same thing as a fresh air intake vent. I m installing skuttle s model 216 6 6 damper control and exterior intake vent. Many kitchen fans move air at a rate of over 1000 cfm. What is make up air and how to install a unit.

Introducing lots of makeup air too close to this plume will disrupt it and often result in worse capture efficiency. 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. Today yale s private hood series comes with act technology offering you a make up air compatible hood selection at 390 cfm. 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.

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. 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. In the past if you were planning to avoid installing make up air you were limited to low cfm low design type of hoods. I saw your video on make up air.