AS NZS 5263.1.3:2021 – Gas appliances Part 1.3: Gas space heating appliances.
5.12.101 Thermal efficiency based on gross heating value
The thermal efficiency of an appliance based on gross heating value shall conform as follows:
(a) Radiant heaters, when tested in accordance with Test Method ZC10l. shall have radiant efficiency not less than 30 %.
(b) Convection and radiant convection heaters, when tested in accordance with Test Method ZC.102. shall have total efficiency as follows:
(i) For natural convection — not less than 60 %.
(ii) For forced convection — not less than 70%.
(c) Room sealed heaters, when tested In accordance with Test Method ZC.102, shall have total efficiency not less than 70 % with flue systems providing the maximum and minimum resistance to flow,
5.12.102 Hued forced convection and flued forced radiant convection heaters
Flued forced convection and hued forced radiant convection heaters shall conform to Clause 5,12.101 Item (b)(ii) when tested at all fan speeds and shall conform to Gause 5.12.101 Item (b)(i) with the fan off.
5.1 2.103 Reduction in thermal efficiency with maximum flue length
When subjected to a flue pull equivalent to a length of flue terminating 4.5 m above floor level, the thermal efficiency of a forced convection heater shall not be less than 60 % and for a natural convection heater shall not be less than 50 %.
5.12.104 Rear registers
When a heater fitted with a rear register for heating a room at the rear of that In which the heater Is located is tested in accordance with Test Method ZC.104 the following shall apply:
(a) The output shall be within ± 10 % of the manufacturer’s specified output when the register is open.
(b) When In the fully closed position, the register shall not allow leakage tn excess of 5 % of the heat output of the heater.
5.12.105 Thermal efficiency In wind conditions
When tested in accordance with Test Method ZC.103, the CO2 content of the flue gases of power Ilued or room sealed heaters shall not fall by more than 10% of its original value when winds of 15 km/h are directed onto the flue terminal irrespective of direction.
5.13 VitIation and emissions
This Clause of AS/NZS 5263.0 applies, except as modified below.
5.13.5 Nitrogen dioxide emission rate (Australia only)
When tested In accordance with Test Method ZC.32, the nitrogen dioxide emission rate (ER) of an Indoor tlueless heater at normal test gas pressure and on maximum gas rate, shall not exceed —
(a) for an emission class 1 appliance, 2.5 ng/J; or
(b) for an emission class 2 applIance, 5.0 ng/P.
5.10 1 Room temperature controls
5.101. 1 Appliance temperature controls
When tested in accordance with Test Method ZC,105. thermostats [or the control of appliances shall —
(a) have a maximum differential of 3°C; and
(b) in successive tests, operate within 1 °C of the set temperature.
5101.2 Location of temperature controls
Heaters shall be designed so that —
(a) significant direct recircuiatlon of the heated air onto the thermostat sensor is avoided;
(b) the thermostat is located so that the body temperature of the heater has no significant effect on Its operation; and
(c) the gas rate does not decrease by more than 10 % when the heater is operated in accordance with Test Method ZC.106.
5,102 Energy labelling (Australia only)
The energy label, as illustrated in Figures AAJOS(A) and AA.105(B) shall display the following:
(a) Stars and part stars.
(b) Red band angle, (RBA).
(c Annual energy consumption (AEC).
(d) The maximum heat output rate (Q).
The values of RBA, AEC and Q shall be determined In accordance with Test Method ZC.107.
NOTE Where an appliance is being tested for multi-gas applications, performance results for the gas type having the same nominal gas consumption as other gas types (of the same design of appliance) are deemed to apply to other gas types for the tests in Test Method ZC.107.
5.103 Emission labelling (Australia only)
The emsion label, as illustrated in hgres AA.106(A) and AA.106(B), shall display the red band shading and reveal stars and part stars.
The text on the label shall show the average NO2 emission rate of the heater in nanograms per joule (ng/J). The stars and red band shading shall be determined according to the NO2 emission rate of the heater (ER) in accordance with Clause 5.13.5, and as shown in Table 5.103.