11 Air conditioning units; central heating radiators; valves as part of radiators; baseboard radiators being components of hydronic heating and cooling systems for residential and commercial use; water filters; household tap water filters; Filtering units for producing potable water for domestic use; water purification units; water purification and filtration apparatus; filters for water filtering apparatus; plumbing supplies, namely, fill valves, flush valves, gaskets, ball cocks, non-metal toilet fittings, namely, toilet seats, toilet tank balls and toilet tanks; caddy for holding pipe nipples; air filters for HVAC units; water supply devices in the nature of heat pumps