8
SECTION 4: VENTILATION
This Appliance is rated below 6.3Kw and does not normally require purpose provided ventilation.
However, if 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.
Section 5: SITE REQUIREMENTS
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.
Fig 1
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 conforming to BS 715.
Eco 4HE may be used in a Pre-cast block flue complying with BS 1289.
To a fireplace that has a precast concrete or clay flue block system conforming to BS1289 or
BS EN 1858.
The flue blocks must have a minimum depth not less than 63mm and a cross-sectional area
not less than the current revision of the standard requiring 16,500mm2.
