Gas Appliance Connected Load (CFH)
Total connected BTU/hr from an appliance schedule and the cubic-feet-per-hour demand for natural gas or propane that feeds gas-pipe sizing.
Formula and source
total_btuh = sum(appliance input ratings); cfh = total_btuh / heating_value. Default heating values: 1,000 BTU/ft^3 natural gas, 2,516 BTU/ft^3 propane (editable).
IFGC 2021 Section 402 (402.2 connected load) and NFPA 54 (National Fuel Gas Code) by name; first-principles energy-to-volume conversion.
Audience
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