InterNACHI Fireplaces, Chimneys & Solid Fuel Appliances 3

Question 1

What is a 'zero-clearance' or factory-built fireplace?

Accepted Answer

A listed, prefabricated metal fireplace that can be installed adjacent to combustible materials per manufacturer specs

Answer

A masonry fireplace with no gap between the firebox and the floor

Answer

A gas fireplace insert with sealed combustion requiring no air gap

Answer

A direct-vent appliance requiring no chimney flue at all

Question 2

Which of the following is a common cause of chimney backdrafting?

Accepted Answer

Negative pressure inside the home created by exhaust fans

Answer

An oversized flue relative to the fireplace opening

Answer

Creosote buildup on the damper plate

Answer

An improperly sized chimney cap restricting the flue outlet

Question 3

What is the hearth extension requirement for a fireplace with an opening greater than 6 square feet?

Accepted Answer

Extends at least 20 inches in front of and 12 inches beyond each side of the opening

Answer

Extends at least 16 inches in front of and 8 inches beyond each side of the opening

Answer

Extends at least 12 inches in front and 8 inches on each side

Answer

Extends at least 24 inches in all directions from the firebox opening

Question 4

When inspecting a gas fireplace, which observation should an inspector report as a deficiency?

Accepted Answer

Yellow flames with black soot deposits on the firebox interior

Answer

Ceramic fiber logs positioned per the manufacturer's diagram

Answer

A glass front panel that becomes warm during operation

Answer

A millivolt pilot light that remains on continuously

Question 5

What does InterNACHI's Standards of Practice require inspectors to do when they cannot visually inspect the interior of a flue?

Accepted Answer

Describe the limitation and recommend further evaluation by a qualified specialist

Answer

Perform a smoke test using a smoke pellet to verify draft

Answer

Decline to report on the fireplace or flue condition at all

Answer

Use a flashlight and mirror to verify partial liner condition only

Question 6

What is the purpose of a chase cover on a factory-built or prefabricated chimney?

Accepted Answer

To cap and weatherproof the framed chimney chase surrounding the metal flue pipe

Answer

To increase the flue draft by narrowing the exhaust outlet

Answer

To provide a spark arrestor at the chimney top

Answer

To support the weight of the chimney cap above the flue termination

Question 7

Which component of a wood-burning stove installation does an inspector evaluate for safe clearance to combustibles?

Accepted Answer

The stovepipe, stove body, and floor protector clearances per manufacturer and code

Answer

The ash drawer handle and its distance from the firebox door

Answer

The color of the high-temperature paint on the stove exterior

Answer

The brand marking and BTU rating on the stove nameplate