Folding portable charcoal, propane and gas fired barbecues, stoves, and grills; Gas burners; Gas furnaces for commercial buildings; Gas furnaces for residential homes; Gas patio heaters; Gas stoves; Gas water heaters; Heaters for warming up portable toilets in cold weather; Heating boilers; Heating inserts for pet beds; Heating installations; Heating systems for residential and commercial buildings comprised of biomass burners, boilers, valves, pipes, manifolds, solar panels, control panels, ...