Apparatus for domestic heating, cooling, ventilating, air conditioning, and installations thereof; driers, air re-heaters and sterilisers, gas burners, central heating radiators, chimney flues, drying apparatus, cooking apparatus and installations, ovens and stoves, fittings therefor, refrigerators and refrigerating equipment, evaporative air coolers, fans, blowers, filters, fittings, duct work and controllers all being parts of said installation and all being goods within class 11