ECOTOUGH

recuperators for water heating, namely, heat exchangers not being parts of machines; heat exchangers not being parts of machines; burners for water heaters, namely, gas burners and oil burners for water heaters; heat coils for water heaters; plumbing fittings, namely, water connection valves for water heaters; water heater housing units, namely, a mount cover to be attached to a recess of a wall for installing a water heater