Flue Height Recommendations
No offsets in the chimney
14 ft
30° or 45° offsets in the chimney
15 ft
90° offsets in the chimney
16 ft.
90° offsets with 2-3 feet of horizontal run
20 ft.
90° offsets into exterior chimney
22 ft.
The standards referenced in this section are easy to find online and the products that meet these standards
will be readily available from your dealer. Refer to this glossary of terms for a better understanding of these
standards:
Standard
Description
UL 103
Covers the safety requirements for factory-built chimneys that vent
wood stoves. Chimney manufacturers can either comply with a 1700°
or a 2100° flue-gas temperature test.
UL 103HT
Chimney manufacturers that choose to comply with the 2100° flue-gas
temperature test will receive the designation of a 103HT chimney
system. HT stands for High Temperature and virtually all modern
wood stoves will require this type of chimney.
UL 1777
Covers the safety requirements for chimney liners that are installed
into masonry fireplaces. Your chimney liner will meet the safety
requirements of UL 1777 only if the installation instructions for the liner
are followed.
UL 127
Covers the safety requirements for factory-built fireplaces. Fireplace
manufacturers can comply with either a 1700° or a 2100° flue-gas
temperature test.
NFPA 211
A publication put out by the National Fire Protection Association that
details the proper installation of wood stoves, chimneys, fireplaces,
and venting systems.
IRC - Chapter 10
The International Residential Code covers the safety requirements for
residential homes. Chapter 10 specifically covers chimneys and
fireplaces
