Chimney Requirements; Masonry Chimneys; Prefabricated Chimneys - Jøtul Greenville F 45 V2 Installation And Operating Instructions Manual

2.0 Chimney Requirements

There are two types of approved chimneys:
1. A code-approved masonry chimney with a ceramic tile
or listed steel flue liner.
2. A prefabricated chimney complying with the
requirements for Type HT (2100°F) chimneys per UL 103
or ULC S629.
Use of an existing chimney requires that the entire system
pass a UL 1482 Level II inspection by a qualified solid fuel
technician or building official.
The chimney size should not be less than the cross-
sectional area of the flue collar, and not more than three
times greater than the cross-sectional area of the flue
collar. If the chimney flue is outdoors, its cross-sectional
area may not exceed two times greater than the stove flue
collar. See also Sect. 3.2.
When selecting a chimney type and the location
for the chimney in the house, keep this in mind: It is the
chimney that makes the stove work - not the stove that
makes the chimney work. This is because a chimney actu-
ally creates a suction, called "draft" which pulls air through
the stove.
Several factors affect draft: chimney height, cross-sec-
tional area (size), and temperature of the chimney, as well
as the proximity of surrounding trees or buildings.
A short exterior masonry chimney will give the poorest
performance because it will be difficult to warm the flue
and sustain the temperatures necessary to maintain draft
strength. In extremely cold climates, it may be necessary to
reline the chimney or extend the height to help establish
draft.
A tall, interior masonry chimney is easier to keep warm
and will perform well under a variety of weather and envi-
ronmental conditions.
The following guidelines give the necessary chimney
requirements based on the national code (ANSI-NFPA 211
for the US. And CSA CAN-B365 for Canada). However, many
local codes differ from the national code to take into ac-
count climate, altitude, or other factors. Your local building
inspector is the final approving authority. Consult them
prior to installation.
Do not connect the stove to any air distribution duct or
system.

2.1 Masonry Chimneys

Follow these guidelines when installing the Jøtul F 45 V2
into a masonry chimney:
• The masonry chimney must have a fireclay liner or
equivalent, with a minimum thickness of 5/8"
(14 mm) and must be installed with refractory mortar.
There must be at least 1/2"air space between the flue
liner and chimney wall.
• The fireclay flue liner must have a nominal size of
8" X 8", and should not be larger than 8"X 12". A round
fireclay liner must have a minimum inside diameter of
6" and maximum inside diameter of 8".
A larger chimney should be relined with an appropriate
code approved liner.
• Brick or modular block must be a minimum of
4" nominal thickness. Stone construction must be at
least 12" thick.
• A newly-built chimney must conform to local codes,
or, in their absence, must comply with national
regulations.
• An existing chimney must be inspected by a
professional, licensed chimney sweep, fire official, or
code officer to ensure that the chimney is in proper
working order. Any repairs must be completed before
installing the stove.
• No other appliance may be vented into the same flue.
• An airtight clean-out door should be located at the
base of the chimney.

2.2 Prefabricated Chimneys

A prefabricated metal chimney must be tested and
listed for use with solid fuel burning appliances. High
Temperature (HT) Chimney Standard UL 103 for the U.S.
and High Temperature Standard ULC S-629 for Canada.
The manufacturer's installation instructions must be
followed precisely. Always maintain the proper clearance
to combustibles as established by the pipe manufacturer.
This clearance is usually a minimum of 2", although it may
vary by manufacturer or for certain chimney components.
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