What stands out . Twin system operate two indoor units with one outdoor unitSmart WiFi controlled ceiling mounted multi cassette air conditionerSuitable for large office spaces up to 47sqmCooling Heating and DehumidifyingA++/A+ Energy efficiency rating to help you save money The TCL group have become one of the largest electrical appliance groups globally. TCL\'s innovative technologies are used every day by customers across the globe. In 2017 they became the third-biggest brand in North America. TCL is a majority shareholder in Alcatel Mobile Phones and Thomson GroupsOur TCL air conditioners are manufactured in the TCL De\'Longhi home appliance factory which is a joint venture between the Italian De\'Longhi Group and the TCL Group. The TCL De\'Longhi air conditioning factory is an advanced research and development facility with strict production and quality controlYour purchase comes with two indoor units and one outdoor unit. The two indoor units which are known as a twin system connect to the single outdoor unit. The new TCL Smart WiFi control cassette type inverter air conditioner has high energy efficiency A++ for cooling mode and A+ for heating mode. The TCL Cassette Air Conditioning Units is one of the most advanced on the market. Essential info . Net dimensions per indoor (W x L x D) 57.4 x 57.4 x 25 cNet dimensions outdoor (W x L x D) 90 x 31 x 66 cmWeight (kg) per Indoor 20Weight (kg) Outdoor 50Piping Size (mm) Liquid Ø mm (inch) 6.35 (1/4)Piping Size (mm) Gas Ø mm (inch) 9.52 (3/8)Maximum Piping Length (M) 15Maximum Piping Height (M) 10Applicable Area 47 sqm . Performance . Cooling Capacity 24000 BtuCooling Capacity 6.15 kWHeating Capacity 24000 BtuHeating Capacity 6.6 kWEnergy Rating A++/A+Air Flow Volume m3/h 600SEER (Average) 6.10SCOP A++/A+ . Features . Smart WiFi controlSelf-diagnostic functionWiFi Cooling Heating and; DehumidifyingEnergy Saving Inverter TechnologyHeat Pump for efficient heatingUltra Quiet OperationRemote control for each indoor unit24 Hour TimerSleep ModeHealth modeAuto restart function5 years warranty . Donwload user manual HERE Tech stuff Our units are designed to reduce the installation time. The indoor and outdoor units are pre-gassed and sealed. The condenser should be fixed on the ground or wall mounted on the outside of the wall using the optional wall-mounting bracket. The unit must be installed by a F-Gas qualified AC engineer. Please ensure the qualified fitter reads the user manual in full before installing. These units contain a gas which is governed by F-Gas regulations. The gas must be handled by a qualified F-Gas personnel. 2 Year warranty is subject to commissioning by qualified F-Gas engineers. 5 Years extended parts warranty is subject to annual service.* Note In order to reduce the Global Warming Potential the outdoor unit footprint and provide extra energy savings; our outdoor units have a rating lower than the sum of indoor units BTU. Please note this will not affect the cooling or heating in individual rooms as those units are variable cooling inverters and they balance the cooling or heating power among the indoor units to achieve the target temperature in the shortest time. Please make sure you size the rooms as per our guidance or call for tech support..