Not only has the energy efficiency increased, but we have also used the new R290 refrigerant making the air conditioners much more environmentally friendly. The MeacoCool comes with a 1.8m long duct - for the most efficient cooling the duct needs to be positioned outside of a window to expell any excess heat, with all other external doors and windows kept closed. POWERFUL COOLING: This 7000 BTU air conditioner provides strong and effective air cooling, Suitable for rooms up to 20 Sqm. Utilising Industry leading R290 refrigerant which is more Eco-friendly and energy Efficient than traditional air conditioning gasses.DIGITAL DISPLAY & REMOTE CONTROL: Led digital display with a 24 hour on/off timer and energy saving sleep mode. The convenient remote control means you can operate anywhere in your room, the 53 db silent operation on low speed ensures maximum performance with minimal disturbance 3-in1 MULTI FUNCTIONAL: Portable air conditioning unit with cooling fan and dehumidifier function, Dedicated Sleep Mode lowering the fan speed and noise level allowing you to get a good cool night's sleep.