Fireplaces, Chimneys & Solid Fuel Appliances Flashcards

Unvented decorative gas logs are installed in a wood-burning fireplace. What should the inspector check for at the damper?

Answer: A clamp or stop that keeps the damper permanently open

The damper must be fixed open so combustion products, including carbon monoxide, cannot spill into the home.

What is the minimum firebox depth for a masonry fireplace under the IRC?

Answer: 20 inches

The IRC requires a firebox at least 20 inches deep, or 18 inches for Rumford fireplaces that meet specific conditions.

What is a key feature of a properly built chimney crown?

Answer: It overhangs the chimney face with a drip edge to shed water away from the masonry

A cast crown with an overhang and drip edge keeps water off the brick below, unlike a flush mortar wash, which tends to crack.

Under NFPA 211, what level of chimney inspection is recommended when a property is sold?

Answer: Level 2

NFPA 211 calls for a Level 2 inspection, including a video scan of the flue, when a property changes hands.

What is the standard clearance from an unlisted radiant wood stove to unprotected combustible walls?

Answer: 36 inches

NFPA 211 sets 36 inches for unlisted radiant stoves unless approved clearance-reduction systems are used.

Where may a single-wall stovepipe connector NOT pass?

Answer: Through a ceiling, floor, or attic space

Single-wall connectors must stay in the room with the appliance and must never pass through ceilings, floors, attics, or concealed spaces.

A factory-built (zero-clearance) fireplace has a metal chimney. Which condition should the inspector report as improper?

Answer: Chimney parts from a different manufacturer than the fireplace's listing

Factory-built fireplaces are tested and listed as a complete system, so mixing in another maker's components voids the listing.