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7.0 Site Requirements
19
7.8 Flue Dimensions
The standard horizontal flue kit allows for flue lengths
between 100mm and 685mm from elbow to terminal
(Fig. 14).
The maximum permissible equivalent flue length is:
Instant 80 HE 4 metres
Instant 105 HE 3 metres
NOTE: Each additional 45° of flue bend will
account for an equivalent flue length of 0.5m.
eg. 45° = 0.5m, 90° = 2 x 45° = 1m etc.
7.9 Flue Trim
1. The rubber flue trim supplied may be fitted to either
the outside wall or on the inner wall of installation.
7.10 Terminal Guard (Fig. 15)
1. When codes of practice dictate the use of terminal
guards, they can be obtained from most Plumbers’ and
Builders’ Merchants.
2. There must be a clearance of at least 50mm between
any part of the terminal and the guard.
3. When ordering a terminal guard, quote the appliance
name and model number.
3. The flue terminal guard should be positioned
centrally over the terminal and fixed as illustrated.
Fig. 14
Fig. 15
100mm
685mm