Room Sizing Guide Once you have the size of the area that you are wanting to install an air conditioner to, follow the below guide to determine your KW range. 2.6kw range suitable for rooms approx. 10-25 sqm Small Bedrooms Small Study Small lounge room Suitable systems- Daikin - FTXM25QVMA Fujitsu - ASTG09K Mitsubishi - MSZGE25 3.5kw range suitable for rooms approx. 25-35 sqm Bedrooms Study Lounge room Small rooms with high ceilings Suitable systems- Daikin - FTXM35QVMA Fujitsu - ASTG12K Mitsubishi - MSZGE35, MSZGE42 5-6kw range suitable for rooms approx. 35-60 sqm Large bedrooms Medium size lounge rooms Large kitchens Offices Suitable systems- Daikin - FTXM50QVMA, FTXM60QVMA Fujitsu - ASTG18K, ASTG22K Mitsubishi - MSZGE50, MSZGE60 7-8kw range suitable for rooms approx. 60-80 sqm Large bedrooms Large open plan areas Small shop spaces Suitable systems- Daikin - FTXM71QVMA Fujitsu - ASTG24K, ASTG30K Mitsubishi - MSZGE71