11 Apparatus for heating, water supply and sanitary purposes, namely, heating systems comprised primarily of tubes, pipes, and manifolds through which warm or high temperature water circulates, cooling systems comprised primarily of tubes, pipes, and manifolds through which cold or low temperature water circulates, heating boilers, water heaters, radiators, heat pumps, scale reducers, namely, electrolytic and magnetic water conditioning units and water flushers for the removal of sludge scale and debris from central heating systems; air and water filters for use in central heating systems; air and water filters for use in heat, water and sanitary pumps; filters for use in water purification; heating apparatus, namely, heating systems comprised primarily of tubes, pipes, and manifolds through which warm or high temperature water circulates, cooling systems comprised primarily of tubes, pipes, and manifolds through which cold or low temperature water circulates, heating boilers, water heaters, radiators, heat pumps, scale reducers, namely, electrolytic and magnetic water conditioning units and water flushers for the removal of sludge scale and debris from central heating system; apparatus for water supply, sanitary apparatus and installations, namely, heating systems comprised primarily of tubes, pipes, and manifolds through which warm or high temperature water circulates, cooling systems comprised primarily of tubes, pipes, and manifolds through which cold or low temperature water circulates, heating boilers, water heaters, radiators, heat pumps, scale reducers, namely, electrolytic and magnetic water conditioning units and water flushers for the removal of sludge scale and debris from central heating system; air and water filters for use in central heating apparatus; air and water filters for use in heat pumps; filters for use in water supply installations; air and water filters for use in sanitary apparatus and installations; heating appliances, water supply apparatus and sanitary apparatus, namely, heating systems comprised primarily of tubes, pipes, and manifolds through which warm or high temperature water circulates, cooling systems comprised primarily of tubes, pipes, and manifolds through which cold or low temperature water circulates, heating boilers, water heaters, radiators, heat pumps, scale reducers, namely, electrolytic and magnetic water conditioning units and water flushers for the removal of sludge scale and debris from central heating system; filters, namely, water filters, air filters and magnetic air and water filters for use with heat pumps and renewable energy technology installations; filters, namely, water filters, air filters and magnetic air and water filters for use in water cleansing; filters, namely, water filters, air filters and magnetic air and water filters for use in central heating systems