11 Gas burners, burner heads, ignitors, gaskets, seals, venturis, filters, fans, air handlers, and hot air blowers for use with residential, commercial, and industrial gas-fired heating applications, namely for HVAC and space heater systems, ovens, boilers, clothes and industrial dryers, incinerators, water heaters, pool heaters, heat treating operations, spraying operations, and forging operations; Gas heating installation modules for residential, commercial, and industrial gas-fired heating applications, namely installation modules for HVAC and space heater systems, ovens, boilers, clothes and industrial dryers, incinerators, water heaters, pool heaters, heat treating operations, spraying operations, and forging operations;