Requirements 5
Chimney/ Flue requirements
Chimney installations and Ventilation should conform to requirements of the Building Regulations and approved
Document J and all subsequent standards referred to. IF IN DOUBT CONSULT PERGE OR HETAS FOR ADVICE.
Twin wall insulated flue should be specified for use with multifuel / wood burning appliances.
Existing clay/brick chimneys should be lined with a flexible liner suitable for use with multifuel / wood burning
appliances.
If in any doubt as to the suitability of the flue or chimney, consult a flue manufacturer or Perge.
If the appliance is NOT used in conjunction with an accumulator tank, then it is advisable to fit a " flue damper /
stabiliser " to ensure correct operation in all conditions. Refer to the manufacturer for more advice.
A minimum effective flue height of 3 metres is recommended for use. Take into account any bends or elbows when
calculating this requirement.
A soot door should be provided to aid in cleaning and servicing of the boiler installation.
A minimum height of 600mm above the boiler to any bend is required, taking into account that each bend will require
an additional flue height to be provided. Any bend should be no greater that 45 degrees.
IMPORTANT: A FLUE DRAUGHT OF BETWEEN 13 and 18 PASCAL IS REQUIRED WHEN RUNNING AT RATED OUTPUT.
ADDITIONAL FLUE PULL SHALL REQUIRE A DRAUGHT STABILISER TO BE FITTED TO PREVENT OVER-FIRING
General requirements
Electrical System
All the electrical connections and installation to the system or controls should conform to all relevant directives and
guidelines within EEC and part P building regulations within the UK.
Water
The heating system must be filled with water in accordance with BS 7593 (most recent revision). Code of Practice for
treatment of water in domestic hot-water and central heating systems guidelines "Avoiding Damage In Hot Water Systems"
Ventilation
Ventilation to the appliance should be provided in accordance with Document J of the Building regulations
Pressurised Systems
Any pressurised system MUST have a sufficiently sized expansion vessel fitted (10% of volume) and suitable PRV. In
addition the integral Anti-Boiling quench coil must be connected to a suitable mechanical safety valve (95degC)