Apparatus and installations for heating, water circulation, water supply and sanitary purposes; plumbing fixtures, fittings and components; heating components; underfloor heating components; valves, thermostatic mixing valves; radiator valves; shower valves; taps; mixer taps; shower installations and apparatus; chilled water installations and apparatus; central heating installations and apparatus; pressurisation units for maintaining the pressure within water systems; solar collectors; solar heating panels; solar powered heating apparatus and installations; under floor heating apparatus and instruments; filtration apparatus for cooling systems, water systems and for heating systems including central heating systems; magnetic filters for use in cooling systems, water systems and for heating systems including central heating systems; apparatus for separating air and also detritus including metal, ferrous material, rust, swarf and dirt from cooling systems, water systems and for heating systems including central heating systems; apparatus for separating detritus including metal, ferrous material, rust, swarf and dirt from cooling systems, water systems and for heating systems including central heating systems; sealed system filling kit; sealed system heating apparatus; apparatus for separating detritus including metal, ferrous material, rust, swarf and dirt from central heating systems and cooling systems; water conditioners; water softeners; heat pumps; air-source heat pump water heaters; air-to-water source heat pumps; ground source heat pumps; cascaded heat pumps; heat pumps for energy processing; heat accumulators; heat pumps for use as part of central heating systems; heat pumps for use as part of central heating systems in houses in multiple occupation; heat pumps for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat pumps for use as part of domestic heating systems; heat pumps for use as part of heating systems which includes radiators; heat pumps for use as part of heating systems which includes underfloor heating; heat pumps for use as part of central heating systems with another heat source; heat pumps for use as part of heating system with another heat source in houses in multiple occupation; heat pumps for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat pumps for use as part of domestic heating systems with another heat source; cascaded heat pumps for use as part of central heating systems with another heat source; cascaded heat pumps for use as part of central heating systems with another heat source in houses in multiple occupation; cascaded heat pumps for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; cascaded heat pumps for use as part of domestic heating systems with another heat source; cascaded heat pumps for use as part of a heating system with another heat source; cascaded heat pumps for use as part of central heating systems; cascaded heat pumps for use as part of central heating systems in houses in multiple occupation; cascaded heat pumps for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; cascaded heat pumps for use as part of domestic heating systems; air-source heat pump water heaters for use as part of central heating systems; air-source heat pump water heaters for use as part of central heating systems in houses in multiple occupation; air-source heat pump water heaters for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; air-source heat pump water heaters for use as part of domestic heating systems; air-source heat pump water heaters for use as part of central heating systems with another heat source; air-source heat pump water heaters for use as part of central heating systems with another heat source in houses in multiple occupation; air-source heat pump water heaters for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; air-source heat pump water heaters for use as part of domestic heating systems with another heat source; air-source heat pump water heaters for use as part of a heating system with another heat source; air-to-water source heat pumps for use as part of central heating systems; air-to-water source heat pumps for use as part of central heating systems in houses in multiple occupation; air-to-water source heat pumps for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; air-to-water source heat pumps for use as part of domestic heating systems; air-to-water source heat pumps for use as part of a heating system with another heat source; air-to-water source heat pumps for use as part of central heating systems with another heat source; air-to-water source heat pumps for use as part of central heating systems with another heat source in houses in multiple occupation; air-to-water source heat pumps for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; air-to-water source heat pumps for use as part of domestic heating systems with another heat source; ground source heat pumps for use as part of central heating systems; ground source heat pumps for use as part of central heating systems in houses in multiple occupation; ground source heat pumps for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; ground source heat pumps for use as part of domestic heating systems; ground source heat pumps for use as part of a heating system with another heat source; ground source heat pumps for use as part of central heating systems with another heat source; ground source heat pumps for use as part of central heating systems with another heat source in houses in multiple occupation; ground source heat pumps for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; ground source heat pumps for use as part of domestic heating systems with another heat source; heat pumps for energy processing for use as part of central heating systems; heat pumps for energy processing for use as part of central heating systems in houses in multiple occupation; heat pumps for energy processing for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat pumps for energy processing for use as part of domestic heating systems; heat pumps for energy processing for use as part of a heating system with another heat source; heat pumps for energy processing for use as part of central heating systems with another heat source; heat pumps for energy processing for use as part of central heating systems with another heat source in houses in multiple occupation; heat pumps for energy processing for use as part of heat networks with another heat source where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat pumps for energy processing for use as part of domestic heating systems with another heat source; heat accumulators for use as part of central heating systems; heat accumulators for use as part of central heating systems in houses in multiple occupation; heat accumulators for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat accumulators for use as part of domestic heating systems; heat accumulators for use as part of a heating system with another heat source; heat accumulators for use as part of central heating systems with another heat source; heat accumulators for use as part of central heating systems with another heat source in houses in multiple occupation; heat accumulators for use as part of heat networks where heating, cooling or hot water is generated at a central source and supplied by the operator to multiple third party customers through a pipe network serving either multiple buildings or multiple occupants in a single building; heat accumulators for use as part of domestic heating systems with another heat source; parts and fittings for all the aforesaid goods.