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Glossary

Manual J load calculation

Definition

ACCA standard for sizing HVAC equipment to a home's calculated heat loss and gain — required for proper heat pump and furnace sizing.

Why this term matters for homeowners

In the Puget Sound, HVAC terms often connect to efficiency ratings, comfort outcomes, and rebate eligibility.

  • Use this term to ask better follow-up questions during estimates.
  • Look for this language in Learn and Evaluate guides to connect definition to decisions.
  • Confirm how this applies to your specific home age, layout, and utility setup.

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