What size do I need for my wood working shop at 672 Sq ft?

Hello, an 18,000 BTU unit should suffice for a space of that size. There are some other determining factors such as insulation quality, direct sunlight, geographical location, etc... but as a general estimate an 18k unit can properly manage a space around 750 square feet. Click Here to be directed to our DIY units of that size. If you have any further questions please feel free to give us a call! Thank you.