Zero Clearance - Timber Construction
Installation Instructions
1 Base and hearth
a) The hearth and the base beneath the Jetmaster must be made of non-combustible
materials. The thickness of the base is as follows:
b) Position unit on finished hearth level. Ensure air intakes at bottom front of unit are not
obstructed.
2 Flues
a) Rivet stainless steel flue at each joint. Fit inner casings to
spigot and join with three 25 mm self-tapping screws thereby maintaining air gap. Fit
outer casings to outer spigot. If flue is to be left exposed terminate outer casing
1000mm above ceiling line. Ensure that flues are ventilated top and bottom.
b) Use minimum 3.6 metres flue. See chart “Minimum Flue Heights for Open Fireplaces”
to determine exact flue requirements.
c) Maintain a minimum clearance between outer flue and combustible materials of 50mm.
d) Provide flashing where flue penetrates roof and fit cowl.
3 Framing
a) Construct timber frame, laying studs at face of fireplace on edge.
b) Select framing sizes from Figure 2. These measurements allow for 25mm clearance
from combustible frame and a raised hearth of 100mm.
c) Keep clearance from top of unit 50mm.
d) Note that depth requirements vary with the use of a cast iron fascia.
e) Overall frame width will be determined by size of selected mantelpiece.
4 Plaster
a) Unit must be installed and flue run
PRIOR
to plastering.
b) The Zero Clearance casing has a location channel for plaster to slot into. This may be
the final chosen finish.
c) With a cast iron fascia, cut the plaster around the fascia. Keep the face of the plaster
and the fascia flush to fit the mantel.
Model
Hearth thickness
Jetmaster 400-700D
26mm
Jetmaster 850 - 1050
100mm
2
