Commercial energy / Buyer guidance
Plan commercial gas peaks without assuming an electric demand model
Build a cold-day gas load inventory, identify firm and interruptible duties, and test peak versus annual-use scenarios.
Annual consumption does not establish peak-day capacity
A gas account that uses fewer therms over a year can still need the same cold-day delivery capability. Space heating, domestic hot water and process loads can overlap. The procurement question is both how much energy will be purchased over the term and what service the facility needs when loads coincide.
Do not assume the electric demand calculator describes this account's gas billing. Obtain the gas tariff, contracted service quantity and supplier responsibilities. Some customers have bundled service; others have transportation or interruption obligations that require separate review. Atmos Pipeline–Texas's service description is one primary example of transport and storage services, not proof of eligibility for a particular meter.
Build a load inventory with the operating team
Record each major burner or thermal process, its input rating, operating schedule and coincidence with other loads. Distinguish nameplate input from useful delivered heat and actual duty cycle. Include startup and recovery periods, not just steady operation. Ask who can safely change timing and which loads cannot be interrupted.
Compare that inventory with meter history for relevant cold periods. A monthly invoice may hide a shorter constraint. Weather, occupancy, production changes and missing meter data should be recorded rather than treated as efficiency results. The utility or qualified engineer must confirm capacity and service requirements before equipment or contracted service is changed.
Worked example: a staggered annual schedule can leave the same cold-day peak
Illustrative operating model: two boilers each have 2 MMBtu/hour input and both may run for 10 hours during the design-day planning scenario. A process heater uses 1 MMBtu/hour for 8 hours. The assumed daily input requirement is 2 × 2 × 10 + 1 × 8 = 48 MMBtu.
If a process schedule reduces that heater's annual operating hours, annual gas use could fall while the 48 MMBtu cold-day scenario remains unchanged. Moving its eight hours outside a heating recovery period could alter an hourly coincidence assumption, but it does not automatically change a daily tariff determinant. These are different tests. No capacity reduction or saving is asserted from this hypothetical inventory.
Prepare for an interruption obligation
If service can be curtailed, identify the authoritative notice channel, responsible person, backup contact and safe response procedure. Record the equipment and environmental approvals needed for alternative fuel or shutdown. A supply agreement cannot make untested backup equipment available or authorize an unsafe fuel conversion.
Keep the financial models separate: commodity consumption, reservation charges, potential imbalance settlement and business continuity. Combining all four into a single estimated price per therm can obscure the obligation that actually needs management. Use the gas demand/reservation guide to reconcile billed determinants before assigning a dollar benefit to peak changes.
Sources and limits
Atmos Pipeline–Texas documents specific transportation and storage services. DOE steam-system guidance supports evaluating thermal systems as an operating system. The inventory arithmetic is independently constructed and is not an engineering design, capacity approval or achieved result.