GAS SUPPLY
planning stage, in order to establish the availability of an adequate
A gas meter can only be connected by the local gas supplier or
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the rate
It is the responsibility of the Gas Installer to size the gas
the principle of the 1:1 gas valve ensures the boiler range is
When operating pressures are found to be below the minimum
Allowing for the acceptable pressure loss of 1mb across the
installation pipework, it can be assumed that a minimum permitted
0
0.5
1
1.5
2
2.5
3
010 20 30 40 50
Pressure drop (mbar )
Heat Input to Boiler (kW)
Gas Cock Pressure Drop
IMPORTANT.
FLUE INSTALLATION
1.
2. It is important that the position of the terminal allows the free
* Only one reduction down to 25mm is allowable per installation
otherwise BS5440-1 2008 dimensions must be followed.
Flue Terminal Positions
Min. Spacing*
1. Directly below, above or alongside an opening
2.
BS5440-1 2008 75mm (3”)
3.
BS5440-1 2008 200mm (8”)
4.
BS5440-1 2008 200mm (8”)
5.
BS5440-1 2008 150mm (6”)
6.
BS5440-1 2008 300mm (12”)
7.
8.
9.
10. From an opening in a car port
11.
12.
Vertical Terminals
13.
14.
15.
16.
Table 4 - Balanced Flue Terminal Position
3. Minimum acceptable spacing from the terminal to obstructions
4.
5.
6.
Detailed recommendations on the protection of combustible
IMPORTANT
of combustion discharging from the terminal cannot re-enter the
building or buildings through any openings into the building such
as ventilators, windows, doors, or other sources of natural air
should be immediately investigated and corrected following the
guidance provided in the current Gas Industry Unsafe Situation