Calculators › HVAC and building envelope Total coil capacity calculator
Total coil capacity
Total coil cooling capacity is calculated as (q_sensible + q_latent) / 12000. Use the stated system boundary and matching input units. Total coil cooling capacity is calculated as (q_sensible + q_latent) / 12000. Use the stated system boundary and matching input units.
Units IP (US) SI (metric)
Tons = q sensible + q latent 12 , 000 \text{Tons} = \frac{q_{\text{sensible}} + q_{\text{latent}}}{12{,}000} Tons = 12 , 000 q sensible + q latent q total = q sensible + q latent q_{\text{total}} = q_{\text{sensible}} + q_{\text{latent}} q total = q sensible + q latent
Calculator
Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.
Worked example
Given
q sensible q_{\text{sensible}} q sensible 360,000 Btu/h q latent q_{\text{latent}} q latent 120,000 Btu/h Tons = 360 , 000 + 120 , 000 12 , 000 = 40 \text{Tons} = \frac{360{,}000 + 120{,}000}{12{,}000} = 40 Tons = 12 , 000 360 , 000 + 120 , 000 = 40
Given
q sensible q_{\text{sensible}} q sensible 54 kW q latent q_{\text{latent}} q latent 18 kW q total = 54 + 18 = 72 q_{\text{total}} = 54 + 18 = 72 q total = 54 + 18 = 72
Symbols and units
Symbol Meaning Unit
Tons \text{Tons} Tons total coil cooling capacity ton q sensible q_{\text{sensible}} q sensible sensible cooling load Btu/h q latent q_{\text{latent}} q latent latent cooling load Btu/h
Symbol Meaning Unit
q total q_{\text{total}} q total total coil cooling capacity kW q sensible q_{\text{sensible}} q sensible sensible cooling load kW q latent q_{\text{latent}} q latent latent cooling load kW
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