How many sqft will this unit cool or heat?

A basic rule is that 9,000 BTU will cover about 350 to 400 sq ft, but that is dependent on things such as climate, ceiling height, etc. So for a more specific coverage size that will fit your needs, visit our sizing guide: https://hvacdirect.com/sizing-air-conditioner-and-heater.html. Feel free to give us a call if you have any further questions.