Rinnai 20
Ducted Gas Heater IM
Table 4. 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.
Properties Approved for Construction after 31st March 2014
c.
Determine if the rating per cubic metre of the space is greater than 0.4 MJ/hr.
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.
NOTE
For New Zealand ventilation requirements and all other applications, e.g. Mechanical Ventilation,
refer AS/NZS 5601.
5.4 EXTERNAL INSTALLATIONS
SP4 Universal and BX5 models can be installed outside of the house. For an installation under a house floor, an
SP4 Universal model should be chosen.
All heaters that are installed externally on the ground should be installed on a level concrete base or pad. If the
heater is to be installed in an elevated position or on a roof, the installation shall comply with AS/NZS 5601. It must
be secured to prevent movement and it must have adequate provision for service access.
5.4.1 SP4UN – Installation of Flashing
For installation details refer to the instructions supplied with associated flashing kit.
NOTE
To allow the heater to be moved out from the wall such as for servicing, it is important to provide
additional length in the ducting connected to the pops.
HEATER POSITIONING
