BS 6332-6:1990 Thermal performance of domestic gas appliances - Specification for thermal performance of combined appliances: fanned-circulation ducted-air heater/circulator
Thermal efficiency requirements and associated methods of test for appliances of rated heat input not exceeding 60 kW combined with a circulator of rated heat input not exceeding 8 kW and burning 1st, 2nd and 3rd family gases.
BS 6332-6:1990 history
0000 BS 6332-6:1990(1999)
1990BS 6332-6:1990 Thermal performance of domestic gas appliances - Specification for thermal performance of combined appliances: fanned-circulation ducted-air heater/circulator