What are signs my HVAC system is oversized?

Signs include frequent short cycling, uneven room temperatures, higher-than-average energy bills, cycles under 10 minutes, noisy airflow, or a contractor sizing equipment based on square footage alone.

Why is short cycling a problem?

Short cycling wears out HVAC components, wastes energy, causes uneven comfort, and reduces equipment lifespan.

How does Manual J prevent oversizing?

Manual J uses real building data like insulation, windows, air leakage, and climate zone to calculate the true heating or cooling load, ensuring the system is correctly sized.

How much energy can right-sizing save?

In this case study, a correctly sized furnace reduced energy use by about 18%, saving $280 annually and $4,000+ over 15 years.

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Manual J Load Calculation Prevents HVAC Oversizing

bpatrick247
Sep 23
0 min read

(800) 671-1895 Ext. 702

brad@rescheckreview.com

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Manual J Load Calculation Prevents HVAC Oversizing

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