sorry
24,000 btu's
600 BTU/ ft is what i have been told.
18,000-21,000 BTU's
36000 Btu
Answer: 14,000 ft² = 0.321395 acres
Assuming you were asking how wide....62.23 ft. An acre is 43560 sq ft * 20 = 871200 sq ft / 14000 ft on one side = 62.22857143 ft on the sides if it's a rectangle.
Yes, a 14,000 BTU furnace will heat your 500 square foot room just fine. Make sure you test it out to make sure you don't turn it up too high at first.
2500sq ft in northern climate
About 18000 BTUH. Rule of thumb is 400 sq ft / ton, 1 ton = 12000 BTUH.
14000BTU
700 to 1000