Rinnai 23 Ducted Gas Heater IM
7. OUTLET GUIDE
The outlet table provides recommendations based on using the Brivis "SuperSizeGuide" / Brivisize™ or a system
designed using accepted design principles. These figures also relate to typical size registers and diffusers used
on domestic heating systems i.e. 300mm x 100mm floor registers and 150mm round ceiling diffusers, with 150mm
ductwork connection. For all systems, a minimum number of outlets must remain fully open (this includes both the
outlet grille and the damper in the duct) if the heater is to operate properly without overheating. Similarly, ceiling
outlet systems have a maximum number of outlets that can remain fully open, to ensure that the velocity through
each outlet is sufficient. These maximum ceiling outlet figures relate to fully open outlets. However, the system will
operate efficiently with more outlets open, if it has been properly balanced.
The outlet table has been divided into two columns as follows:
Table 5. Outlet table
Model
Airflow Rate
(l/s)
A
Maximum
Outlets
B
Minimum
Outlets
A. The maximum number of outlets that
should remain fully open for a ceiling
outlet system.
B. The minimum number of outlets that
should remain fully open for floor/ceiling
systems.
BX3C Models
BX315C (300mm)** 498 8 4
BX320C (300mm)** 581 11 5
BX320C (350mm)** 622 11 5
BX326C (350mm)** 819 16 8
BX326C (400mm)** 921 16 8
2PWN Models
2PW15N 452 10 5
2PW20N 527 13 7
2PW20N XA 561 13 7
2PW26N 858 17 8
2PW26N XA 944 17 8
*Model and (Base Box Pop) size
Airow gures are based on a total static pressure of 125Pa for the 26 kW model, and 50Pa for
the 15kW and 20kW models.
The maximum and minimum number of outlets detailed in Table 5 are as per AGA specication.
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