8
This Appliance does not normally require purpose provided ventilation. However, a second appliance
operating within the same room or space must be taken into consideration when assessing ventilation.
When commissioning the appliance spillage is detected, then amongst other problems there may be
insufficient natural ventilation for correct operation of the flue. If spillage is detected with windows
closed, but the appliance does not spill with the windows open, this demonstrates a lack of natural
ventilation.
If spillage is still detected with the windows open, the flue is at fault. Installation of an air brick is the
best solution to lack of ventilation.
Any ventilation fitted must comply with BS 5871 part 2 and BS 5440 part 2.
Air Vents fitted under or within the immediate vicinity of the appliance must not be used as adverse
effects to the operation of the Flame Safety Device (FSD) may occur. Spillage detected during
commissioning is almost always a result of poor flue performance that cannot be corrected by any
amount of ventilation.
For Republic of Ireland ventilation may be required, see IS 813, ICP3, IS 327, and any other rules in force.
The fireplace opening should be inspected and repairs made where necessary.
A chair brick or fireback may be left in place, providing that the dimensional requirements for debris
collection space and spigot clearances are met. See diagram below.
This appliance requires a natural draught flue system which may be one of the following;
225mm x 225mm (9in x 9in) brick or stone
125mm (5in) minimum diameter lined brick or stone.
125mm (5in) minimum diameter twin wall flue must conform to BS 715.
Any existing draught device situated under the fireplace must be sealed off. The opening area must be
non-combustible. The appliance requires a hearth with non-combustible surface of at least 300mm in
depth and 12mm thick.
The top surface must be at least 50mm above the surrounding flooring level, or be surrounded by a
raised edge or fender 50mm high. To enable the product of combustion to be cleared properly up the
flue, the outlet at the back of the appliance must have a 50mm minimum clearance between it and the
back wall of the opening or any other obstruction, the area immediately above the outlet must form a
smooth path into the flue.
The fireplace or builders open must be reduced to suite the appliance both side to side and the full
depth of the appliance, a decorative back panel i.e. marble, granite etc. must not be used as a closure
plate for the appliance please see below.
Section 4: VENTILATION
Section 5: SITE REQUIREMENTS
