3
Please note: While Saf-T Wrap is not required for every application, it is highly recommended. The performance
of the heating system is greatly enhanced when adding Saf-T Wrap. An insulated system helps to improve draft,
minimize condensation and flue surfaces warm up quickly. This added feature is important for exterior chimneys.
A new masonry chimney must comply with the National Building Code and NFPA 211.
The safe operation of a venting system depends on the proper installation and use of all materials and components supplied
and proper use and operation of the connected heating equipment. Liner and component arrangements depend on the size
and configuration of the chimney structure and the type, number and location of the appliances that are to be vented into the
chimney.
Do not connect more than one solid fuel burning appliance to a single chimney flue and do not connect gas or liquid fired
appliances to chimney flues serving a solid fuel burning appliance.
The minimum allowable liner height is 8 feet with a maximum of 80 feet.
Do not fill the air space between the liner and chimney with loose fill insulation
or cement. Saf-T Wrap is the approved insulation wrap to use with Saf-T
Liner. Saf-T Wrap is an 8 lb. density insulation. The Saf-T Wrap is used to
reduce the clearance to combustible construction outside of the masonry
chimney. The clearance between the masonry chimney and combustible
materials is dependent on the installation configuration as shown in Table 2
and Figure 2.
Saf-T Wrap is available for tee sections and in 24” lengths.
Saf-T Wrap must cover the Saf-T Liner from the appliance tee or the top of the
smoke chamber area to within 8” but not closer than 3” of the top of the
masonry chimney. See note next page.
FIG.1
3 ft. min
2 ft. min
The size of the liner selected should be the same size of the
appliance flue outlet opening or as specified in the appliance
manufacturer’s instructions. Correct sizing is critical for venting of
low temperature flue products in geographical areas experiencing
sustained low ambient temperatures. Improper sizing may lead to
excessive condensation of moisture, creosote buildup and poor
draft. A certified technician may alter the size of the liner to suit
the appliance within codes perimeters. Consult the appliance
manufacturer for guidance.
0”
0”
2”
1”
1”
0”
Saf-T Liner
Type of
Installation
Clearance
‘A’
Saf-T Liner
in interior of
Masonry Chimney
Clearance Between Masonry
Chimney Exterior and
Combustibles (as per NFPA 211)
Saf-T Liner with
Saf-T Wrap
Interior Installation
‘B’
Exterior Installation
‘B’
TABLE 2- AIR SPACE CLEARANCES TO LINER (see Fig. 2)
FIG.2
B Exterior
B Interior
A
10 ft
SAFETY
Caution must be used when working on a roof. The pitch of the roof and type of shingles must be considered before you set
up for your installation. Insure the safety of all workers at all times. Proper and safe scaffolding should be used for a safe
installation. Check with local safety codes if safety equipment is required.
Always inspect work site. Check overhead for power lines, antennas, brick chimney or other obstacles. Secure ladders to the
building or to the chimney if safe to do so before installing the liner.
