Sensible Heat Formula

BTU/HR = 1.08 * CFM * ΔT

Total Heat Formula

BTU/HR = 4.5 * CFM * ΔH

Latent Heat Formula

BTU/HR = 0.69 * CFM * Δgr

GPM Formula

GPM = BTU/HR(Airside) / (water ΔT x 500)

Air Change Rate Formula

ACH = (CFM * 60) / Volume

Coefficient of Performance (COP)

COP = BTU Output / BTU Input = EER / 3.413

Energy Efficiency Ration (EER)

EER = BTU Output / Watts Input

Cooling Loads (General)

300-400 SQFT per Ton

30-40 BTU / SQFT

CFM / SQFT

Perimeter Spaces - 1.0-3.0 cfm/sqft

Interior Spaces - 0.5-1.5 cfm/sqft

Lighting Loads

T12s - 1.2 Watt / SQFT

T8s - 0.8 Watt / SQFT

LEDs - 0.4 Watt / SQFT

1 Ton = 12,000 BTU/HR

Tons =

BTU/HR

Tons to BTU/HR BTU/HR to Tons Calculate

1 kW = 3412 BTU/HR

kW =

BTU/HR

Kilowatts (kW) to BTU/HR BTU/HR to kW Calculate

kW/Ton = 12 / EER

kw/Ton =

EER

kW/Ton to EER EER to kW Calculate