Rated heat output
Approved Document J, Combustion appliances and fuel storage systems, 2010 edition incorporating 2010, 2013 and 2022 amendments, states:
The rated heat output for an oil appliance is the maximum declared energy output rate (kW) as declared on the appliance data plate.
The rated heat output for a solid fuel appliance is the manufacturer’s declared nominal energy output rate (kW) for the appliance. This may be different for different fuels.
See also: Heat input rate.
See also: Rated heat output and rated heat input of combustion appliances.
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