What square footage does at 15,000 BTU PTAC unit cover?

Hello, thank you for reaching out with your question. A 15,000 BTU PTAC is able to cover ~600-1,000 sq ft room/zone. This square footage could change depending on the height of the ceilings, windows in the room, insulation, and other factors that could shorten or extend the footage coverage; for specifics, please feel free to give our customer sales line a call.