600 BTU/ ft is what i have been told.
About 18000 BTUH. Rule of thumb is 400 sq ft / ton, 1 ton = 12000 BTUH.
650 square feet
600 square feet.
The number of BTUs needed to cool a room depends on factors such as insulation, ceiling height, and climate. On average, a 300 sq ft room would require around 6,000-7,000 BTUs to keep it under 90 degrees Fahrenheit in moderate climates. It's best to consult a HVAC professional to determine the exact BTU capacity needed for your specific room.
At least 8000 btu
24,000 btu's
30 ft * 20 ft = 600 ft2
18,000-21,000 BTU's
36000 Btu
One Small room "144 Sq ft"
600 ft = 182.9 metres