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Propane Tank Sizing Calculator

Size propane tanks based on total BTU demand, delivery interval, vaporization rate, and climate zone

Free propane storage planning calculator for HVAC contractors, propane dealers, and homeowners who need a preliminary reference review prompt for a residential or light commercial propane system. Enter appliance BTU nameplate prompts, delivery row, placement row, climate row, and propane price. The calculator returns local storage and vaporization prompts, usable-gallon rows, source warnings, and supplier/AHJ review reminders. It does not select a final tank, regulator, vaporizer, piping layout, setback, fill policy, delivery agreement, or installation approach.

Pro Tip: Vaporization capacity can be the limiting prompt even when storage gallons look adequate. Treat the local vaporization rows as supplier-review flags, not as a final tank decision. Verify the exact tank manufacturer chart, fill-level policy, regulator package, generator duty cycle, delivery constraints, adopted NFPA 58 edition, and AHJ requirements before purchase or installation.

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Propane Tank Sizing Calculator
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How It Works

  1. Enter Appliance BTU Prompts

    List propane appliance input ratings from nameplates or manufacturer data. The calculator totals local connected-load prompts and applies a simple diversity row for planning only.

  2. Set Delivery and Climate Rows

    Choose a delivery row, placement row, and climate row or manual HDD prompt. The output is a storage and vaporization review prompt, not a supplier delivery guarantee or minimum storage determination.

  3. Review Local Diversity and Vaporization Rows

    The local diversity and vaporization rows are source-gap prompts. Supplier charts, tank product data, regulator package, fuel-gas piping, fill policy, and AHJ requirements control the final decision.

  4. Export Source Boundaries

    Use the report and PDF to carry assumptions, NFPA/PERC source pointers, and unresolved supplier/AHJ review gaps into the project file.

Built For

  • HVAC contractors preparing a first-pass propane storage review before supplier coordination
  • Propane dealers documenting nameplate-load and vaporization prompts before final review
  • Homeowners comparing tank-row assumptions before discussing a lease or customer-owned tank
  • Builders collecting storage, setback, delivery, and source-warning prompts for rural projects
  • Generator installers flagging propane storage and vaporization assumptions before supplier review

Assumptions

  • Local usable capacity uses an 80% fill prompt; verify actual fill policy and product requirements.
  • Local reserve uses a 20% delivery buffer prompt; verify supplier minimum delivery and winter service constraints.
  • Vaporization rows are public PERC/source-gap prompts plus local interpolation and must be verified against current tank and supplier charts.
  • Diversity rows are local planning prompts and are not NFPA 54 table reproduction.

Limitations

  • Does not determine NFPA 58 separation, fire-code, permit, inspection, supplier, or AHJ compliance.
  • Does not model exact hourly load, generator fuel curve, duty cycle, or future appliance profile.
  • Does not account for actual delivery logistics, road access, hose length, truck scheduling, minimum quantities, or contracts.
  • Does not approve excavation, underground tank burial, cathodic protection, leak testing, purging, relighting, or commissioning.

References

  • NFPA 58 - Liquefied Petroleum Gas Code source pointer
  • NFPA 54 - National Fuel Gas Code source pointer
  • Propane Education and Research Council (PERC) - Technical Pocket Guide source pointer
  • EIA and NIST unit/energy source pointers

Frequently Asked Questions

Vaporization rate is the propane vapor output prompt for a tank at a given temperature and fill level. Supplier and manufacturer charts control the final review. If demand exceeds actual vaporization capacity, low pressure and appliance lockout can occur.
The calculator compares local 120, 250, 325, 500, and 1,000 gallon rows as planning prompts. Actual available tanks, ratings, ownership terms, installation method, and refill policy depend on supplier, product, code, site, and AHJ requirements.
The local diversity row reduces connected load for a first-pass simultaneous-demand prompt. It is not an NFPA 54 table reproduction or a substitute for appliance nameplates, fuel-gas pipe sizing, regulator review, generator duty-cycle review, or supplier engineering.
Lease versus customer-owned tank decisions depend on supplier contracts, inspection responsibility, fill access, insurance, service availability, local pricing, and property plans. The calculator does not make a financial recommendation.
Aboveground and underground rows affect local vaporization and placement prompts, but underground tank burial, corrosion protection, excavation, utility locates, drainage, traffic protection, and AHJ requirements need product and supplier review.
Disclaimer: This screen provides preliminary local propane storage prompts and source warnings only. It does not select a final tank, regulator, vaporizer, piping layout, setback, delivery plan, excavation method, permit path, or installation approach. Verify all outputs with the propane supplier, current product data, adopted code, fire marshal/AHJ, and qualified fuel-gas review.

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