What Size AC for a 15x10 ft Office?
A 15×10 ft office room (150 sq ft) with normal sun exposure requires approximately 5,000–6,000 BTU/hr.
How to use this tool
- Enter the room length and width in feet.
- Select the sun exposure level for your room.
- The calculator recommends the minimum BTU/hr rating for your AC unit.
Find the recommended BTU rating for cooling a standard 15×10 foot office or study room.
Frequently asked questions
- How many BTU do I need for a room?
- A general rule is 20 BTU per square foot for average rooms. Add 10% for sunny rooms and subtract 10% for heavily shaded rooms.
- What does BTU stand for?
- BTU stands for British Thermal Unit. It measures the amount of energy needed to raise one pound of water by one degree Fahrenheit. Air conditioners are rated in BTU/hr.