Is makeup air required by code?

In the US, the construction industry has long recognized the need for adequate makeup air for exhaust systems. Beginning in 2009 and in every version since, the International Residential Code (IRC) has required that makeup air be provided for kitchen hood exhaust systems with capacity of 400 cfm or greater.

Why do commercial kitchens need make up air units?

Simply stated, a make up air unit pulls air in to your space from outdoors and conditions it to the indoor temperature, to replace air that’s pulled out by your kitchen exhaust equipment. Without it, you get back drafting, poor temperature control, negative air pressure and air quality problems.

How do you calculate how much make up air is needed?

Calculate the required volume. Divide room volume (Step 1) by total/1000 (Step 2). If less than 50, additional air is needed. If greater than or equal to 50, no additional air is needed.

Is a vent fan required in a kitchen?

Kitchens do not need exhaust fans since there is no code that requires you to install them. However, kitchen exhaust fans play a role in maintaining indoor air quality and, to some degree, protect the health of the occupants of the house. They get rid of the moist air and odors that arise when cooking.

Do I really need makeup air?

Your range hood pulls 1200+ CFM Even with a powerful hood, you may not require makeup air if it is installed in a large kitchen or well-ventilated space. However, if you live in a small space or the ventilation is not adequate, make up air is likely a good option for you.

How does a makeup air system work?

Make-up air is designed to “make up” the air in your interior space that has been removed due to process exhaust fans. This type of HVAC solution pulls in fresh, tempered air from outside your building to replace existing air that cannot be recirculated.

Does make up air need to be heated?

Heated makeup air systems temper the outside air, preheating it before in enters your HVAC system. This improves both the comfort and the safety of those inside. For areas where is gets very hot, a makeup air unit with cooling is also available.

How do you calculate makeup?

Calculating Markup

  1. Start with the formula: markup = gross profit / cost.
  2. Fill in what we know: 30% = gross profit / $0.79.
  3. Simplify the equation: . 30 x $0.79 = gross profit.
  4. Solve for gross profit: $0.24 = gross profit.
  5. Add to the original cost: $0.24 + $0.79 = $1.03.

Do you need a hood vent for a gas stove?

Do I need a range hood for a gas stove? Simply put — yes! If you own a gas stove, it’s vital to have proper ventilation for it in the form of a range hood. Depending on your cooking style, cooking on your stove top can sends lot of impurities into the air.

Do you need a hood with a gas stove?

Do I need a range hood for a gas stove? Yes. Gas stoves produce intense heat and smoke, so you need a kitchen fan that can vent heavy cooking exhaust outside your home.

Do kitchen fans bring in outside air?

Venting hoods, or ducted hoods, either connect to an outside source of air or filter the air. When in use, venting hoods pull cooking fumes, smoke, and pollution molecules, such as carbon monoxide from smoke, either directly outside or through a filtration system.

When is makeup air required for kitchen exhaust?

2018 IRC, G2407.5—Makeup air provisions: “Where exhaust fans, clothes dryers and kitchen ventilation systems interfere with the operation of appliances, makeup air shall be provided.” But these excerpts still don’t provide any insight into when makeup air is required and how to provide it.

Do you need a make up air unit in your kitchen?

If you use your kitchen a lot at home, it’s vital to take a look at make-up air system options to keep good air flowing as smoothly as possible. However, if your kitchen exhaust vent is whining and sputtering, it might be time to install a make-up air unit.

When do I need to use make up air?

Make-up air is additional air that “makes up” for or replaces air that is being removed in your home, room, kitchen, or other space by an exhaust fan or range hood. You may require make up air if: Your range hood pulls 1200+ CFM. You live in a small kitchen. Your kitchen is poorly ventilated.

What are the upcodes for makeup air required?

Related Code Sections 505.2 Exhaust Systems, Makeup Air Required M1503.4 Exhaust Systems, Makeup Air Required 403.2.2 Ventilation, Transfer Air C403.2.6.1 [CE] Commercial Energy Efficiency, Demand controlled ventilation 508.2 Exhaust Systems, Compensating Hoods