20 ft
probably more than one second
It takes 1 BTU to raise 1 lb of water per degree Fahrenheit.
24,000 btu's
5000 BTU is a tiny amount of cooling - are you sure you don't mean 50,000 BTU? A 5000 BTU might give you a drop of 5 degrees C in a 6' x 8' office with no south facing windows, as long as the ceiling isn't too high. For a normal 10' square room, 12,000 BTU is a more reasonable starting point, then add more for sources of heat gain in the room.
30,000 btu
1500 square feet
Usually, depending on a few other factors, you need 20 to 22 btu per square foot. Higher ceilings and more windows require more.12000 btu should cover about 550 to 600 square feet of space.
20 ft
30000 btus for every 400 square ft
30000 btus for every 400 square ft
That is a 2 1/2 ton unit. One ton of A/C = 12000 btu. The 30 in the model number refers to 30000 btu.
To calculate the BTU (British Thermal Units) needed to heat a space, you need to consider the area of the space, the desired temperature increase, the insulation levels, and any additional heat sources. You can use a BTU calculator or consult with a heating specialist to determine the appropriate BTU rating for your space.
A US gallon of water is about 8.4 lb, so 30,000 galls is 252,000 lb. One BTU is the heat to raise one pound of water by one degF, so BTU's in your example are 252,000 x 15 = 3,780,000 BTU.
That is a 2 1/2 ton unit. One ton of a/c equals 12000 btu of cooling capacity. The 30 in the model number represents 30000 btu.
20 btu per square foot
11800 BTU/hr is 3.46kW