1.1 Size of Unit
For satisfactory heating the size of the Jetmaster fireplace unit should be
related to the size of the room. If rooms interlead without provision for
closing by means of doors or heavy curtains, the entire cu bi c ca pa ci ty
must be taken into account.
The heating capacities of all units are shown in the catalogue. However,
please note that these capacities are conservative and the heating capacity
may be increased by up to 25% with a well packed fire.
1.2 Chimney Flues:
(a) Recommended flue sizes are:
Model Square Round
or Rectangular
500, 600, 700S, 700D 200 x 200mm 225mm
700 Double-sided 300 x 300mm 350mm
850 200 x 300mm 250mm
1050 200 x 400mm 300mm
1200/1500 350 x 500mm 450mm
The cross-sectional area of the flue must be within 20% of the above-
mentioned sizes throughout its length and preferably straight.
(b) It is recommended that moulded flue liners (square or rectangular)
with matching 45E (side or back) bends if required, be used as they
provide a perfect flue of the correct size throughout. When liners are
used, surrounding brickwork can be reduced to 110mm. Savings on
brickwork and plastering offset the cost of the liners.
(c) Steel square or rectangular flues can be manufactured on request
where an exposed flue is desired or where a masonry chimney has
not been provided for.
(d) If flue liners are not used, a straight flue is preferable, but if there are
any bends ensure that there is no reduction in area at these points
and that there is no mortar blockage. The inside brickwork of the
chimney must be plastered to a semi-smooth finish.
(e) If the flue extends outside a wall the moulded flue must be
supported to ground level on a concrete foundation in brickwork.
1.3 Insulation
(a) When installing, all the built-in surfaces of the Jetmaster firebox
and smoke gather must be insulated with the fibreglass supplied with
the unit. This should be held in position with adhesive tape.
1.
Installation of Universal model into a new Home
1
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