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FLUE TERMINAL LOCATION
In addition to the requirements of AS/NZS 5601.1, the following should be observed:
NOTE: During winter months check the flue terminal and make sure no blockage occurs from build-up
of snow or ice.
1. Condensate can freeze on the flue terminal. Frozen condensate on the flue terminal can result
in a blocked flue condition.
2. Give special attention to the location of the flue terminal location to avoid possibility of property
damage or personal injury.
3. Gases may form a white vapour plume in winter. The plume could obstruct a window view if the
termination is installed near windows.
4. Prevailing winds, in combination with below-freezing temperatures, can cause freezing of
condensate and water/ice build-up on buildings, plants or roofs.
5. The bottom of the flue terminal and the air intake shall be located at least 300mm above grade,
including normal snow line.
6. Through-the-wall flue terminals shall not terminate over public walkways or over an area where
condensate or vapour could create a nuisance or hazard or could be detrimental to the
operation of regulators, relief valves, or other equipment.
7. Locate and guard flue termination to prevent accidental contact by people or pets.
8. DO NOT terminate flue in window well, stairwell, alcove, courtyard or other recessed area.
9. DO NOT terminate flue above any door, window, or gravity air intake. Condensate can freeze,
causing ice formations.
10. Locate or guard flue terminal to prevent condensate from damaging exterior finishes. Use a
rust-resistant sheet metal backing plate against brick or masonry surfaces.
11. DO NOT extend exposed flue pipe outside of building beyond the minimum distance required
for the flue termination. Condensate could freeze and block flue.
OUTDOOR INSTALLATION
The water heater must be installed with service access in mind.
AIR INTAKE
Ensure the air intake hood is attached to the water heater pointing
downwards. Refer to
OUTDOOR FLUEING
CAUTION: Proper installation of flue is critical for the safe and efficient
operation of the water heater. Refer to Table 17 on page 47
Table 6 for maximum flue lengths and flue sizes. Under no circumstances is the flue diameter size to
be reduced.
WARNING: Due to the high operating efficiency of the MVB, the flue
gasses may condense in the flue. The flue MUST be of stainless steel,
minimum 316L grade. Use of other materials can result in personal injury,
death or property damage.
WARNING: Condensate traps and drains for the flue piping are required for installations of the MVB.
Fig 14
on page 42.
42
Fig 14 – Air Filter Box
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