Intex heater is ideal for getting a little extra use out of your pool at the start and end of the Summer season, the Intex 2.2kw above ground electric swimming pool heater is also ideal for giving your pool water a bit of extra warmth. The Intex 2.2kw Above Ground Electric Pool is suitable for use with Intex easy set or metal frame pools with a diameter of 8ft to 12ft, it easily connects in line with your pool cartridge filter pump. Although the heater will fit most 15ft Intex pools we don't recommend using one.