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The water heater must be installed with service access in mind. There are also special requirements in
AS/NZS 5601.1 for water heaters installed in a garage, an enclosed space and other locations.
Remember all local authorities have regulations about putting water heaters into roof spaces.
Heater Side
Minimum Clearance from
Combustible Surfaces
(mm)
Minimum Service
Clearance
(mm)
Right Side
25
500
Left Side
25
500
Rear
300
600
Front
Open
900
Top
0
350
Floor*
0
0
*DO NOT install on carpeting.
Table 5: Clearances
– All Installations
Fig. 2: Minimum Clearances
– Indoor and Outdoor Installations
PLANNING THE INSTALLATION
The MVB requires adequate clearance on all four sides to facilitate maintenance. Gas, water,
electrical, air intake and flue discharge connections are all located at the back of the water heater and
careful planning should be undertaken to ensure a successful installation. The following order is
recommended:
•
Plan the layout
•
Install water inlet including pump and manifolds
•
Install water outlet including manifolds
•
Install gas lines including any regulators and manifolds
•
Install air intake (room sealed models)
•
Install flue
•
Make electrical connections
