Figure 3: Minimum openings.
Dimension
i40 SIT
i40 Maxitrol
A
17 7/8”
16 1/4”
B
24 5/8”
24 5/8”
C without handles
35”
35”
C with handles
36 1/2”
36 1/2”
Existing Fireplace Preparation
The Tofino Gas inserts are certified to be installed into pre-existing approved fireplace. The minimum existing
opening fireplace requirements are listed in Figure 3 below.
Before installing the Tofino inserts, have the chimney and fireplace swept including ash dumps and clean
outs. Clean and remove any creosote and soot residue that may cause odors and stains after the insert
has been installed. The fireplace chimney should be in good working order and made of non-combustible
material. Make sure chimney clean-outs fit properly.
When preparing an existing fireplace to install a gas insert, any modifications that will compromise the
integrity of the existing fireplace are not allowed. To make way for the inserts’ venting, the fireplace flue
dampener may be blocked open or removed. Refractory, glass doors, screen rails, screen mesh and log
grates can be removed from the fireplace before installing the insert. Also, smoke shelves, shields and
baffles may be removed if attached by mechanical fasteners. Cutting any sheet metal parts of the fireplace,
in which the gas fireplace insert is to be installed, is prohibited.
If the factory-built fireplace has no gas access hole(s) provided, an access hole of 1.5” dia. (37.5mm) or
less may be drilled through the lower sides or bottom of the firebox in a proper workmanship like manner.
This access hole must be plugged with non-combustible insulation after the gas supply line has been
installed.
Note: SIT controlled installations require that an electrical outlet be installed either into an existing
fireplace cavity before the Tofino is installed, or alternatively, the power cord can access a pre-existing
power outlet elsewhere in the room by way of knock-out openings located on either side of the
backing plate. See “Figure 34” on page 19.
9
100000300 051119-48
i40 TOFINO
