Domestic Kitchen Exhaust Requirements

About this chapter: Chapter 15 is specific to exhaust systems related to clothes dryers, domestic cooking, toilet rooms, bathrooms and whole-house ventilation systems. Included are requirements for exhaust discharge locations, protection of exhaust ducts from damage, exhaust duct construction, duct length limits, and exhaust termination clearances. Kitchen Hood Vent Codes Are Based On The IRC And Your Local Code Range hood vent code requirements are laid out in the IRC or the International Residential Code.

The IRC is a 'model code' that many U.S. states and counties base their code on. For the final say on any code matter, you will need to consult your local state or city building codes or even a quick call to your local building.

2012 IMC SECTION 505 DOMESTIC KITCHEN EXHAUST EQUIPMENT 505.1 Domestic systems. Where domestic range hoods and domestic appliances equipped with downdraft exhaust are located within dwelling units, such hoods and appliances shall discharge to the outdoors through sheet metal ducts constructed of galvanized steel, stainless steel, aluminum or. 505.3 Common Exhaust Systems for Domestic Kitchens Located in Multistory Structures Where a common multistory duct system is designed and installed to convey exhaust from multiple domestic kitchen exhaust systems, the construction of the system shall be in accordance with all of the following.

Residential cooking operations on the other hand have none of these requirements. As of the release of this bulletin, no current UL standard exists to govern residential exhaust hoods from a performance and safety perspective. IMC only requires compliance with Section 505, "Domestic Cooking Exhaust Equipment", which eliminates the need for a Type 1 hood, grease-rated ductwork, or a grease.

Single or combined Type II exhaust systems for food. In fact it simply states; Where domestic cooking exhaust equipment is provided (2018 - 505.2 Domestic cooking exhaust). The only two main things most people might recall is; Table M1505.4.4 that requires the exhaust flow (if there is one) be a minimum of 100 CFM intermittent or 20 CFM continuous, and M1503.6 that says if it is capable of.

Where domestic kitchen cooking appliances are equipped with ducted range hoods or down- draft exhaust systems, the exhaust rate shall equal or exceed the airflow required in Table M1505.5 at one or more speed settings. 505.6 Other than Group R. In other than Group R occupancies, where electric domestic cooking appliances are utilized for domestic purposes, domestic range hoods shall be permitted for such appliances.

Hoods and exhaust systems for such electric domestic cooking appliances shall be in accordance with Sections 505.2 and 505.4. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures.