TL;DR
A gas load calculation is the totaling of every connected appliance's BTU input on a fuel-gas system to confirm the meter, regulator, and each pipe segment can deliver full demand at adequate pressure, worked through the sizing tables of the fuel gas code by the longest-run method or branch-length method. It is mandatory whenever load is added — a tankless water heater's 180,000 BTU or a pool heater routinely exposes piping sized decades ago for a furnace and range.
What it means
A gas load calculation is the totaling of every connected appliance's BTU input on a fuel-gas system to confirm the meter, regulator, and each pipe segment can deliver full demand at adequate pressure, worked through the sizing tables of the fuel gas code by the longest-run method or branch-length method. It is mandatory whenever load is added — a tankless water heater's 180,000 BTU or a pool heater routinely exposes piping sized decades ago for a furnace and range. The result dictates whether new appliances need a meter upgrade or a dedicated line.
Where it sits in the glossary
Gas load calculation is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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