How many Btu per square foot for chill room?

Answer 1

square feet have no meaning

1 btu will raise 1 pound of water 1 degree F

an 80 gallon water heater has 640 pounds of water

644 btu will raise the water temperature 1 degree

typical water heater input is 36,000btu / hour

water temperature desired 120 water starts at 70 degrees to raise the water 50degrees requires 51000Btu or about 1.5 hours (recovery time)

this does not account for heat loss or heat transfer from the flame to the water

the volume of air in the room is a factor

(square feet at 8' ceiling takes 1/2 as much as 16')

the weight of the air the weight of the stuff in the room

people in the room add heat

a lot harder to cool an auditorium than an empty warehouse

so what are you cooling and what is its thermal mass?

is there a phase change?

( to cool water from 33 degrees to 32 takes 90 times the heat removal)

is there a time constraint ?

( can we get it cool within 3 hours or must it take 5 minutes)

most important

how many degrees must we drop the temperature?

Answer 2

How many btu for a 12 by 12 room

Answer 3

165

Answer 4

650