Rinnai 12 Ducted Gas Heater IM
Table 1. Ventilation F Factors
Gas appliance location Source of Ventilation Factor F
Gas appliance in a room or enclosure
Directly to outside* 300
Via an adjacent room 600
Gas appliance in a plant room
Directly to outside* 150
Via an adjacent room 300
Gas appliance in a residential garage Directly to outside* 300
* Directly to outside means through an external wall to outside, into a cavity vented to outside,
into an underfloor space vented to outside, or into a roof space vented to outside.
Installation of a gas appliance in a room or enclosure for properties approved for construction AFTER
March 31
st
2014
a. Determine if the rating per cubic metre of the space is greater than 0.4 MJ/hr per m³.
Example:
Unit rating (Ur) = 120MJ/hr
Room volume (Rv) = 1m x 1m x 2.4m = 2.4m
3
Ur/Rv = 120/2.4 = 50 MJ/hr per m
3
As the result is greater than 0.4 MJ/hr per cubic metre of the space, additional ventilation is required.
Refer to AS/NZS 5601 for natural ventilation requirements.
For New Zealand ventilation requirements and all other applications, e.g. Mechanical Ventilation,
refer AS/NZS 5601.
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