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NOTE: Chase Installation: (See Figure 3.) A chase is an enclosure built specifically to house a chimney. The
interior of a chase is open from the ZC20 to the roof, eliminating the need to cut through ceilings and the roof.
Normally, a chase is built outside and against the exterior wall of a home. A hole is cut through the wall, and the
ZC20 is located in the bottom of the chase, with the front of the unit flush with the interior wall. Chases are
commonly veneered on the outside with brick, stone or wood to give the appearance of a conventional fireplace
flue. Occasionally, they are built inside and boxed in, similar to a stairwell. When making a chase installation, it is
important to read the chimney manufacturer’s instructions prior to building, as there are specific requirements for
bracing a free-standing flue and must be planned for. There are also occasions where offsets are used within a
chase to accommodate unusual building designs, or to locate the ZC20 further into a room.
FRAMING CONSTRUCTION AND INSTALLATION
Except as noted, the ZC20 can be installed almost anywhere you desire. There are, however, a few clearance and
framing restrictions that must be followed. See Figure 3 and 4 to make sure that these clearance restrictions are
met. It is much wiser to place your ZC20 correctly at the start of the installation than to be forced to relocate it after
much of the work is done.
You must ensure that the floor is of adequate strength to accept the load of this unit. If inadequate, the floor will
require additional support, such as bracing. NOTE: A wooden base constructed of plywood or 2”x4” boards is
required in order to get proper clearance above the extended hearth (millboard, rock, stone, etc.).
Good planning is essential for a satisfactory installation, therefore, at this point you should have decided where the
ZC20 is to be located and the route the chimney will follow to the roof—straight up, or chase. If you cannot decide
the best route, contact your Dealer for assistance with the planning.
Above (Figure 4) are framing location examples with depth dimensions for some typical configurations. These are
finished measurements so install accordingly.
Position ZC20 for installation as follows:
1. Thoroughly clean the area where the unit will be placed. Remove any carpeting/padding from the area where
the ZC20 will be installed.
2. Lay out the location on the floor for ZC cabinet. (See Figure 4)
3. Layout for hearth extension preparation and removal of carpet and padding.
4. A sheet metal safety shield is placed 1 1/2” under the cabinet. It must extend out under the floor protector.
5. Now, you are ready to install the chimney system for the ZC20. If you are building an outside chase, follow
approved Chimney Manufacturer’s instructions. If you are penetrating a ceiling, install the chimney as
follows:
a. Drop a plumb line, locate, and mark point on ceiling directly over center of ZC20 chimney adapter
b. After locating the center of the hole, install the firestop spacer per chimney manufacturer’s instructions.
FIGURE 4
25”
25”
25”
INTERIOR LOCATION
ADJACENT ROOM
OF EXTERIOR CHASE
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