How Do I Determine if 6500 Btus or 12000 Btus Is Better for My Needs?

If your room is 300 square feet, has a high roof, and is often used by two or three people, then 12,000 BTUs of air conditioning may be more appropriate. Conversely, if the room is smaller, well insulated, and infrequently used, 6,500 BTUs of air conditioning may be sufficient.