   Not sure which Portable Air Conditioner is right for you? Use our Cooling Wizard to help you find the perfect portable air conditioner based on your space requirements.

Room Size Calculator
Use this table to calculate the cooling capacity you need in a portable air conditioner for your server room or computer room.

 Area to Be Cooled(sq.ft.) Capacity(Btu/Hr) 100 to 150150 to 250250 to 300300 to 350350 to 400400 to 450450 to 550500 to 700700 to 1000 5,0006,0007,0008,0009,00010,00012,00014,00018,000

Please note:
• If the room is heavily shaded, reduce capacity by 10%.
• If the room is very sunny, increase capacity by 10%.
• If more than two people regularly occupy the room, add 600 Btu/Hr for each additional person.
• If the unit is for a kitchen, increase capacity by 4,000 Btu/Hr.
• For each server add 1200-1500 BTU's.
• For each UPS add 800-1000 BTU's.
• A room that is 10' x 10' x 8' is 800 cubic feet. 800 cubic feet multiplied by a factor of 5 cubic feet for computers, servers, etc., equals 4,000 BTU's.
Chilled Water System Equations:
BTU/H = Heat, Btu's per Hour, British Thermal Units per Hour
GPM = Water Flow Rate (Gallons Per Minute)
ΔT = Temperature Difference in °F
TONS = AC/Chiller Load
GPMevap = Evaporator Water Flow Rate (Gallons Per Minute)
GPMcond = Condenser Water Flow Rate (Gallons Per Minute)

To Calculate Chiller or Cooling Tower Tonnage:
Chiller TONS = (GPMevap × ΔT) / 24 = (Gallons Per Minute multiplied by Temperature Difference in °F) divided by 24

Cooling Tower TONS = (GPMcond × ΔT) / 30 = (Gallons Per Minute multiplied by Temperature Difference in °F) divided by 30

Additional formulas:
BTU/H = 500 × GPM × ΔT
1 TON = 12,000 BTU/H

Volume of a cylinder = p r2 × h = [pi times (radius squared) times height]

Volume of a box = L × W × H = [Length times Width times Height]

Volume of a sphere = d3 × 0.5236 = [(Diameter cubed) times 0.5236]

CFM = Cubic Feet per Minute = [Volume x Air changes] / 60 Minutes = [Volume times Air Changes] divided by 60 minutes

HELPFUL CONVERSION LINKS:

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