What size is the window kit? Jessica 29 June 2021 00:51 All the air conditioners we sell have the same size window kit which is 400cm x 39cm. Related articles Why is the window kit heat exhaust hose so short? Can I buy a longer one? How often do I need to drain the watertank? How can I claim on my warranty? What's the difference between an Air Cooler and an Air Conditioner?