
FLUEING
40
MULTIPLE WATER HEATER FLUE INSTALLATION
Where multiple water heaters are installed, each water heater must be individually flued to the outside. A
common flue system
MUST NOT
be used.
For a multiple unit installation, the water heater is certified for installation with zero clearance between
adjacent water heaters.
If the water heaters are mounted on a wall, although they are certified for installation with zero clearance
between them, it may be necessary to leave a suitable space of a minimum 175 mm between each water
heater if a Condensate Trap and condensate drain line is to be installed. The Condensate Trap and
condensate drain line would located between each water heater with the common drain manifold positioned
below the water heaters. Refer to
“Multiple Water Heater Condensate Trap and Condensate Drain Line
Installation”
on page 41.
Refer to
“Flue Terminal Location”
on page 28 for flue terminal clearances from other objects in accordance
with AS 5601 or AS/NZS 5601.1.
Follow the relevant instructions pertaining to the type of flue installation, with the following additional
requirements in relation to flue terminal clearances to be taken into account. The distances are based on
using the coaxial flue system components.
Vertical Flue Terminations
1.
The minimum
side by side
centre to centre distance
between flue terminals is to be no less than 360 mm.
2.
The minimum
back to back
centre to centre distance
between flue terminals is to be no less than 570 mm.
Horizontal Flue Terminations
1.
The minimum
horizontal
centre to centre distance between
flue terminals is to be no less than 360 mm.
2.
The minimum
vertical
centre to centre distance between
flue terminals is to be no less than 570 mm.
570
ABOVE
AND
BELOW
360
360
horizontal flue terminations
vertical flue terminations