Install Instructions

Z-FLEX
®
This list details only some of the intended uses of the gas liner. If your appliance is not on this list and you are not sure if it is
appropriate to use with a gas liner, contact your appliance manufacturer prior to installation.
Gas or propane:
Furnaces Water heater
Fireplaces Boilers
Clothes dryers Burners
Ranges
Minimum and Maximum Clearances –
Table 1.8
Liner diameter Minimum chimney dimensions
3” 3⅝” x 3⅝”
4” 4⅝” x 4⅝”
5” 5⅝” x 5⅝”
6” 6⅝” x 6⅝”
7” 7⅝” x 7⅝”
8” 8⅝” x 8⅝”
9” 9⅝” x 9⅝” Max. chimney height: 65 ft.
10” 10⅝” x 10⅝” Min. chimney height: 10 ft.
12” 12⅝” x 12⅝” Min. brick thickness: 3½
in.
Installation Procedure
1. All models are designed and listed to be installed in a masonry or prefab metal chimney.
2. Read all instructions carefully prior to installing and using appliance.
3. Clean the chimney thoroughly, removing all soot, debris and tar glaze creosote. Repair or replace any cracked, loose
or missing bricks, mortar and other materials that could inhibit correct installation of the chimney liner
– 3 –
Description of Appliance Minimum clearance: in (mm)
Gas appliance without draft hood 18 (457)
Electric gas and oil incinerators 18 (457)
Unlisted gas appliance with draft hood 9 (229)
Boilers/furnaces equipped with listed
gas burners and draft hoods
9 (229)
Listed gas appliance with draft hood 6 (152)
Restaurant-type ranges 18 (457)
Unlisted gas unit heaters 18 (457)
Listed gas unit heaters with draft
hoods
6 (152)
Other low heat industrial appliances 18 (457)
Minimum Appliance Clearances – Table 1.10
Clearances from connectors to unprotected combustible material must be in
accordance with the table below.
Appliance List