2.2 Efficiency.
The efficiency of this appliance has been measured as specified in BS EN 613 and
the result is as below :
Model
Efficiency % (Gross)
944 / 944 RC
69
944 when converted to LPG (Manual only)
71
The gross calorific value of the fuel has been used for this efficiency calculation. The
test data from which it has been calculated has been certified by BSI.
The efficiency value may be used in the UK Government's Standard Assessment
Procedure (SAP) for energy rating of dwellings.
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.
3. GENERAL INSTALLATION REQUIREMENTS
3.1 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 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.
BS 5440 Part 1
BS 5440 Part 2
BS 4543 Part 2
BS 5871 Part 1
BS 6891
BS 8303
In England and Wales, the current edition of the Building Regulations issued by the
Department of the Environment and the Welsh Office.
In Scotland, the current edition of the Building Standards (Scotland) Regulations
Page 8
©
GDC Group Ltd. 2015
INSTALLER GUIDE
Gas
Conversion factor from
net
to
gross
efficiency
Natural Gas
0.901
LPG
0.921
