CKD Regulatory Compliance 2

Question 1

Under the IRC, a kitchen exhaust hood capable of exhausting more than how many cfm requires makeup air?

Accepted Answer

400 cfm

Answer

IRC M1503.6 requires makeup air for kitchen exhaust systems capable of exhausting more than 400 cfm.

Question 2

Where may a residential range hood exhaust duct legally terminate?

Accepted Answer

Outside the building

Answer

IRC M1503.1 requires domestic cooking exhaust to discharge to the outdoors, never into attics, crawl spaces or concealed spaces.

Question 3

Which duct type is required for a domestic kitchen range hood under the IRC?

Accepted Answer

Smooth-interior single-wall galvanized steel, stainless steel or copper

Answer

IRC M1503.2 requires a single-wall duct of galvanized steel, stainless steel or copper with a smooth inner wall.

Question 4

Range hood ductwork serving a domestic kitchen must be equipped with which component?

Accepted Answer

A backdraft damper

Answer

IRC M1503.3 requires kitchen exhaust ducts to be airtight and fitted with a backdraft damper.

Question 5

How must makeup air for a high-cfm kitchen hood be controlled per the IRC?

Accepted Answer

Automatically to operate simultaneously with the exhaust

Answer

Makeup air dampers or fans must be automatically controlled to operate when the exhaust system runs.

CKD - Certified Kitchen Designer Practice Test