The conversion of
net
efficiency to
gross
was achieved by multiplying the net
efficiency by the following conversion factor from Table E3 of SAP 2005, rounding
down to the nearest whole number.
5. GENERAL INSTALLATION REQUIREMENTS
5.1 Regulations, Standards and Law.
The installation must be in accordance with these instructions.
For the user’s protection, in the United Kingdom it is the law that all gas appliances
are installed by competent persons in accordance with the current edition of the Gas
Safety (Installation and Use) Regulations. Failure to install the appliance correctly
could lead to prosecution. GAS SAFE REGISTER and CORGI require their members
to work to recognised standards.
In the United Kingdom the installation must also be in accordance with:
All the relevant parts of local regulations.
All relevant codes of practice.
The relevant parts of the current editions of the following British Standards:-
BS 715 -
Specification for metal flue boxes for gas-fired appliances not
exceeding 20kW.
BS EN 1806 -
Chimneys – Clay/ceramic flue blocks.
BS 5440 Part 1 -
Flueing and ventilation for gas appliances of rated input not
exceeding 70 kW net (1st, 2nd and 3rd family gases).
Specification for installation of gas appliances to chimneys and
for maintenance of chimneys.
BS 5440 Part 2 -
Installation and maintenance of flues and ventilation for gas
appliances of rated input not exceeding 70 kW net (1st, 2nd
and 3rd family gases).
BS 6891 -
Installation of low pressure gas pipework of up to 35mm (R1
¼) in domestic premises (2nd family gas) - specification.
BS 1251 -
Fireplace components.
BS EN 1856 Part 1 - Chimneys – Requirements for metal chimneys.
BS 5871 Part 1 -
Specification for the installation and maintenance of gas fires,
convector heaters, fire/back boilers and decorative fuel effect
gas appliances. Gas fires, convector heaters, fire/back boilers
and heating stoves (2nd and 3rd family gases).
BS EN 1858 -
Chimneys – Components – Concrete flue blocks.
BS EN 15287 Part 1 - Chimneys. Design, installation and commissioning of
chimneys. Chimneys for non-room sealed heating appliances.
In England and Wales, the current edition of the Building Regulations issued by
the Department of the Environment and the Welsh Office.
Page 9
INSTALLER GUIDE
©
Baxi Heating U.K. Limited 2010.
Gas
Conversion factor from
net
to
gross
efficiency
Natural Gas
0.901
