37 Installation, repair, cleaning, maintenance, servicing and reconditioning of apparatus for monitoring, apparatus for measuring, apparatus for checking, instruments for monitoring, instruments for measuring, instruments for checking, apparatus for condition monitoring, instruments for condition monitoring, detection apparatus, detection instruments, remote monitoring apparatus, air monitoring apparatus, air measuring apparatus, air analysis apparatus, and air pollution measuring devices; installation, repair, cleaning, maintenance, servicing and reconditioning of remote monitoring and control apparatus, detection apparatus and instruments, apparatus and instruments for controlling and monitoring indoor air quality, apparatus and instruments for improving indoor air quality, heat detectors, sensors, heat sensors, remote controls and electronic control devices for heating management; installation, repair, cleaning, maintenance, servicing and reconditioning of power supplies, electronic control devices for cooling management, electronic control devices for air movement, electronic control devices for ventilation systems and electronic control devices for air distribution and air filtration systems; installation, repair, cleaning, maintenance, servicing and reconditioning of equipment and apparatus for heating, drying, ventilation, air conditioning and filtration; installation, repair, cleaning, maintenance, servicing and reconditioning of HVAC units; installation, repair, cleaning, maintenance, servicing and reconditioning of ventilation installations and apparatus; installation, repair, cleaning, maintenance, servicing and reconditioning of ventilation systems, ventilation units and ventilation equipment; installation, repair, cleaning, maintenance, servicing and reconditioning of equipment and apparatus for controlling indoor air quality; installation, repair, cleaning, maintenance, servicing and reconditioning of equipment and apparatus for improving indoor air quality; installation, repair, cleaning, maintenance, servicing and reconditioning of equipment and apparatus for whole house ventilation; installation, repair, cleaning, maintenance, servicing and reconditioning of fans, electric fans, room fans, ceiling fans, extraction fans and ventilating fans; installation, repair, cleaning, maintenance, servicing and reconditioning of heat pumps; installation, repair, cleaning, maintenance, servicing and reconditioning of air movement equipment and apparatus; installation, repair, cleaning, maintenance, servicing and reconditioning of equipment and apparatus for air distribution and air filtration; installation, repair, cleaning, maintenance, servicing and reconditioning of air conditioning units; installation, repair, cleaning, maintenance, servicing and reconditioning of decentralised ventilation equipment and apparatus, decentralised mechanical extract ventilation equipment and apparatus, decentralised mechanical extract ventilation systems and decentralised mechanical extract ventilation units; installation, repair, cleaning, maintenance, servicing and reconditioning of continuous running electric fans and continuous running extraction fans; installation, repair, cleaning, maintenance, servicing and reconditioning of heat recovery equipment and apparatus and single room heat recovery equipment and apparatus; installation, repair, cleaning, maintenance, servicing and reconditioning of alternate flow fans and ceramic core fans; installation, repair, cleaning, maintenance, servicing and reconditioning of centralised ventilation equipment and apparatus, centralised ventilation systems, centralised ventilation units, mechanical extract ventilation equipment and apparatus, mechanical extract ventilation systems, mechanical extract ventilation units, continuous running ventilation equipment and apparatus, continuous running ventilation systems and continuous running ventilation units; installation, repair, cleaning, maintenance, servicing and reconditioning of positive input ventilation equipment and apparatus, positive input ventilation systems, positive input ventilation units, continuous running ventilation equipment and apparatus, continuous running ventilation systems and continuous running ventilation units; installation, repair, cleaning, maintenance, servicing and reconditioning of intermittent extract fan equipment and apparatus, intermittent extract fan systems, intermittent extract fan units, intermittent extract fans for residential ventilation, intermittent extract fan systems for residential ventilation and intermittent extract fan units for residential ventilation; installation, repair, cleaning, maintenance, servicing and reconditioning of inline mixed flow fans, inline mixed flow fan equipment and apparatus, inline mixed flow fan systems, inline mixed flow fan units and intermittent extract fan equipment and apparatus; information, advisory and consultancy services in relation to all of the aforementioned services.