4800
160
133.3333
Half of 12000 is the same thing as 12000 divided by 2. 12000/2=6000. So 6000 is half of 12000.
208.3333
3.3333
181.8182
92.3077
2500
3000
4000
1090.9091
It will take 300000 btus at 12000 a ton and a ton of air will be 400 sq feet so. 10000 sq ft divided by 400 is 25 tons of air then multiply 25 times 12000 btus and you get 300000