Standard: UL - 1777 CRD

UL STANDARD FOR SAFETY CHIMNEY LINERS - SUBJECT: REQUIREMENTS FOR METALLIC CHIMNEY LINERS FOR FACTORY-BUILT CHIMNEYS OR GAS VENTS

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Scope:

These requirements cover metallic and nonmetallic chimney liners intended for field-installation into new or existing masonry chimneys and metallic chimney liners intended for field-installation into factory-built chimneys or gas vents.

These liners are intended to be used in conjunction with and for the natural draft venting of Category I gas-fired, Type L vented oil-fired, and solid-fuel-fired residential-type appliances in which the maximum continuous flue-gas outlet temperatures do not exceed 1000°F (538°C).

Chimney liners for field installation into masonry chimneys are intended to be installed in existing masonry chimneys with or without a liner of fire-clay tile, or to be used as a substitute for masonry fire-clay tile flue liners in new chimneys.

FACTORY-BUILT CHIMNEY – A factory built, vertical (or approximately vertical) metallic shaft enclosing at least one flue for conducting flue gases to the outdoor atmosphere.

WALL PENETRATION ASSEMBLY - A device used to provide a means for routing a chimney connector through a combustible wall to a masonry or factory-built chimney.

Gas Vent – A flue gas passage for the venting of Category I gas-fired appliances.

Organization: UL
Document Number: 1777 crd
Publish Date: 2013-04-15
Page Count: 4
Change Type: STCH
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Inactive
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