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Comfort Specialist
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Experience:  Master HVAC & Gas, Air Balance, LG Master Commissioner, University of North Carolina Certificate holder for Industrial Ventilation Design.
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Hello, What distance of separation is recommended from a masonry

Resolved Question:

Hello, What distance of separation is recommended from a masonry chimney thimble and the chimney access clean out door is recommended? Thank you, Greg
Submitted: 1 year ago.
Category: HVAC
Expert:  Comfort Specialist replied 1 year ago.

Wvfan79 :

Hello Greg! I'm Norman but you can call me Norm.

Wvfan79 :

When referencing both the International Mechanical Code and International Building Code neither one specify a speration distance from the thimble to the clean-out. The do specify the minimum distance below the lowest chimney inlet opening. Here is the direct reference.

Wvfan79 :

From the Mechanical Code book...

Wvfan79 :

801.13 Cleanouts. Masonry chimney flues shall be provided
with a cleanout opening having a minimum height of6 inches
(152 mm). The upper edge ofthe opening shall be located not
less than 6 inches (152 mm) below the lowest chimney inlet
opening. The cleanout sh

Wvfan79 :

From the IBC....

Wvfan79 :

801.13 Cleanouts. Masonry chimney flues shall be provided
with a cleanout opening having a minimum height of6 inches
(152 mm). The upper edge ofthe opening shall be located not
less than 6 inches (152 mm) below the lowest chimney inlet
opening. The cleanout sh

Wvfan79 :

Ooops didn't paste the right one.

Wvfan79 :

From the IBC...

Wvfan79 :

2113.18 Masonry chimney cleanout openings. Cleanout
openings shall be provided within 6 inches (152 mm) ofthe
base of each flue within every masonry chimney. The upper
edge of the cleanout shall be located at least 6 inches (152
mm) below the lowest chimney inlet opening. The height of
the opening shall be at least 6 inches (152 mm). The cleanout
shall be provided with a noncombustible cover.

Wvfan79 :

These are the only clearance references in the code about the placement of clean-outs in a masonry chimney.

Comfort Specialist, Designer, Estimator & Technician
Category: HVAC
Satisfied Customers: 1319
Experience: Master HVAC & Gas, Air Balance, LG Master Commissioner, University of North Carolina Certificate holder for Industrial Ventilation Design.
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Master HVAC & Gas, Air Balance, LG Master Commissioner, University of North Carolina Certificate holder for Industrial Ventilation Design.