installation and maintenance services; heating system installation, repair and maintenance services; heating equipment installation, repair and maintenance services; installation of air-conditioning systems; air conditioning apparatus installation; installation of air conditioners; installation and repair of air-conditioning systems; installation of heating, ventilation and air-conditioning systems; installation of air-conditioning control systems; installation and repair of heating, ventilating and air-conditioning systems; installation, maintenance and repair of air-conditioning systems; air-conditioning apparatus installation; cleaning of air conditioning apparatus; installation of apparatus for air-conditioning; washing of air conditioning apparatus; air-conditioning system installation and repair; installation of heating, ventilation and air-conditioning [HVAC] systems; installation and repair of air-conditioning apparatus; repair or maintenance of air-conditioning apparatus; installation, maintenance and repair of air-conditioning apparatus; installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments; air conditioning installation renovation; air-conditioning apparatus washing services; cleaning of air conditioners; repair or maintenance of air-conditioning apparatus for industrial purposes; repair of air-conditioning apparatus; installation, maintenance and repair of heating, ventilation and air-conditioning [HVAC] systems; air conditioner cleaning services; maintenance and repair of air conditioning apparatus; installation of heating and cooling apparatus; repair and maintenance of air-conditioning apparatus; installation of HVAC systems; installation, maintenance and repair of HVAC [heating, ventilation and air conditioning] systems; repair and maintenance of air conditioners