What size is the window kit? Jessica October 05, 2021 11:48 Updated All the air conditioners we sell have the same size window kit which is 157 inches x 15 inches. Related articles Why is the window kit heat exhaust hose so short? Can I buy a longer heat exhaust hose? How often do I need to drain the water tank? How do I clean my honeycomb filter? How can I claim on my warranty?