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Today's Hours 8am - 11pm esthow do I determine the size unit I need
As a good rule of thumb, the 18K BTU unit designed for up to 750 sq ft while the 24K BTU unit is designed for up to 1000 sq ft. There are other factors that can affect this, ceiling height, climate etc. For more information pertaining to knowing the right size of unit for your home/business please refer to out website, https://hvacdirect.com/sizing-air-conditioner-and-heater.html If you have any further questions or need further assistance, please feel free to reach out to one of our experienced customer service representative and they would be happy to assist you. Thank you and have a wonderful day.