9 Apparatus and instruments for monitoring fluid in central heating and cooling systems; magnetic filters, namely, water testing instrumentation in the nature of magnetic filters for monitoring and detecting impurities in central heating and cooling systems; smart magnetic filters, namely, water testing instrumentation in the nature of smart filters for monitoring and detecting impurities in central heating and cooling systems; magnetic power flushing filters, namely, water testing instrumentation in the nature of magnetic power flushing filters for monitoring and detecting impurities in central heating and cooling systems; magnetic smart power flushing filters, namely, water testing instrumentation in the nature of smart magnetic power flushing filters for monitoring and detecting impurities in central heating and cooling systems; water testing apparatus and instruments for monitoring and detecting contamination; apparatus and instruments for testing and monitoring central heating water for impurities; apparatus and instruments for testing and monitoring water in central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing the efficiency and performance and energy consumption of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; apparatus and instruments for monitoring and testing heating, ventilating, air conditioning, and water supply apparatus, systems, devices and installations; apparatus and instruments for monitoring and testing the efficiency and performance of heating, ventilating, air conditioning, and water supply apparatus, systems, devices and installations; remote monitoring apparatus, systems, devices and installations, namely, filters for monitoring and detecting impurities in central heating and cooling systems; remote monitoring apparatus, systems, devices and installations, namely, filters for monitoring and detecting impurities in central heating and cooling systems for use with heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; thermostats; thermal sensors for use in thermostats; downloadable computer software for monitoring impurities and the efficiency and performance of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; downloadable computer software for the control and monitoring of heating, ventilating, air conditioning, and water supply apparatus, systems, devices and installations; downloadable computer software for monitoring, testing and recording the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable interactive computer software accessible electronically, via computers or mobile telephones, for monitoring impurities in central heating and cooling systems and for monitoring the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable computer software applications for monitoring impurities in central heating and cooling systems and for monitoring the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable computer software applications for monitoring impurities in central heating and cooling systems and for monitoring the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable computer software applications for data monitoring; downloadable computer software applications for monitoring impurities and the efficiency and performance of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; downloadable computer software applications for the control and monitoring of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; downloadable computer software applications for monitoring, testing and recording the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable computer software applications for monitoring data from central heating filters; downloadable mobile phone applications for monitoring impurities in central heating and cooling systems and for monitoring the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable mobile phone applications for monitoring impurities in central heating and cooling systems and for monitoring the efficiency and performance of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable mobile phone applications for data monitoring; downloadable mobile phone applications for monitoring impurities and the efficiency and performance of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; downloadable mobile phone applications for the control and monitoring of heating, ventilating, air conditioning or water supply apparatus, systems, devices and installations; downloadable mobile phone applications for monitoring, testing and recording the efficiency and performance and energy consumption of central heating systems, cooling systems, boilers, heaters, radiators, pumps and pipes; downloadable mobile phone applications for monitoring data from central heating filters; electrical meters