73336092
Nov 9, 1981
May 31, 1983
Regulators, Switches and Controllers for Use with Domestic Heaters and Domestic Hot Water Heaters
Electrical and Scientific ApparatusDomestic Gas, Oil and Solid Heaters, Domestic Hot Water Heaters, Heat Pumps for Use with Domestic Hot Water Heaters, Gas and Oil Burners for Use with Domestic Heaters and Domestic Hot Water Heaters, Boilers, Expansion Vessels and Water Tanks for Use with Domestic Hot Water Heaters
Environmental Control Apparatus