Boilers for heating installations; Circulators in the nature of water heaters; Electric boilers; Electric heaters for commercial use; Electric space heaters; Electrical boilers; Filters, heaters and pumps sold in combination for use in commercial use; Filters, heaters and pumps sold in combination for use in swimming pool; Filters, heaters and pumps sold in combination for use in household; Filters, heaters and pumps sold in combination for use in hot tubs; Filters, heaters and pumps sold in combination for use in swimming pools; Furnace boilers; Gas fired water heaters; Gas water heater for bathtub consisting of circulation pump with thermostat to fill, re-heat water and keep water warm; Gas water heaters; Gas water heaters; Heating boilers; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, control panel switches, and electrical wire, all sold as a unit; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, solar panels, control panel, switches and electrical wire, all sold as a unit; Heating systems for residential and commercial buildings comprised of biomass burners, boilers, valves, pipes, manifolds, solar panels, control panels, switches and electrical wire, all sold as a unit; Hot water heaters; Hybrid water heater; Ignition systems comprised of a gas supply tube with a nozzle and an electrical igniter to create a flame at the nozzle for industrial applications, namely, for igniting waste gases being discharged from industrial stacks and for igniting gas-fired boilers; Industrial boilers; Tankless water heaters; Water heaters; Water heaters for household use; Water heaters for commercial use