Hearths, Walls, Fire Surrounds, Shelves & Clearances - Potterton Housewarmer 45 Installation & Service Instructions Manual

General - Page 5
3.2. Hearths, Walls, Fire Surrounds,
Shelves & Clearances.
Hearths
The fire MUST be installed onto a non-combustible
hearth. The hearth must be to the dimensions shown in
Fig. 2.
Walls
If the wall against which the fire is to be mounted has a
combustible cladding or surround, the following
conditions must be met:-
1. The cladding must fit snugly to the wall face, any air
cavities must be sealed to prevent air leakage into
the flue which would spoil the flue pull.
2. The cladding material must be cut away at the
edges of the fireplace opening. Under no
circumstances can it be present inside the fireplace
recess or in any other position which will allow direct
contact with the hot flue products.
Fire Surround
The surround's fireplace opening and flat area must
comply with the dimensions shown in Fig. 2. It must be
sealed to the wall (and infill panel if fitted) correctly and
have no combustible material protruding within the
fireplace opening or exposed to the combustion
products.
Shelves
A combustible or non-combustible shelf can be fitted
above the fire provided it complies with the following
guidelines:
1. Any shelf up to 150mm in depth must be a minimum
of 85mm above the top of the fire.
2. Generally for every 10mm increase in shelf depth
the shelf height above the top of the fire must
increase by 10mm.
3. Any shelf 240mm in depth must be a minimum of
175mm above the top of the fire.
See Figure 3 for examples.
Clearances
In all installations there must be a minimum clearance of
115mm on both the left and right hand sides of the fire.
This will allow for air supply and access for operation of
controls and servicing.