What Size AC for a 20x15 ft Living Room?
A 20×15 ft living room (300 sq ft) with normal sun exposure requires approximately 8,000 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.
Estimate the right air conditioner BTU output for a spacious 20×15 foot living room or open plan area.
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.