Rep Our Products

Are you interested in representing CaptiveAire and selling our products?
Please fill out the following form, and we will contact you soon.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

 
Cooling Formulas
 
CONVERSION
1 Ton = 12000 Btu/hr

 
COOLING LOAD REQUIREMENT
Total Cooling Load (Btu/hr) = 4.5 x CFM x (H1 – H2)
 
Where:
CFM = Airflow in Cubic Feet Per Minute
H1 = Entering Air Enthalpy (Btu/lbm dry air)
H2 = Leaving Air Enthalpy (Btu/lbm dry air)
 
Or
 
Total Cooling Load (Btu/hr) = Sensible Cooling Load (Btu/hr) + Latent Cooling Load (Btu/hr)
 
Where:
Sensible Cooling Load (Btu/hr) = CFM x Density Factor x (T1 – T2)
Latent Cooling Load (Btu/hr) = CFM x 0.69143 x (G1 – G2)
 
Where:
CFM = Airflow in Cubic Feet Per Minute
Density Factor =   1.08 +  (70-Blower Temp) * .024

10
T1 = Entering Air Drybulb Temperature (°F)
T2 = Leaving Air Drybulb Temperature (°F)
G1 = Grains of Moisture of Entering Air = 7000 x humidity ratio (lbm moisture/lbm of dry air)
G2 = Grains of Moisture of Leaving Air = 7000 x humidity ratio (lbm moisture/lbm of dry air)

 
EFFICIENCY CALCULATION
SEER = BTU / W-hr

 
COST OF COOLING:
Cost of cooling = BTU/hr x hrs of operation x electricity cost ($/kw-hr) / (SEER x 1000)