Manual J + S prepared for you.
ACCA-approved residential heat load calculations. Overnight service available. Made in the USA.
What is Manual J & S?
Manual J and Manual S are the two-part foundation of any properly designed HVAC system. Manual J calculates exactly how much heating and cooling your home requires. Manual S is the equipment - selecting the right equipment ensure that the proposed equipment can actually deliver that performance at your local climate conditions. Not too little and not too much. Rightsizing is what is best here.
Together they ensure your system is sized right, selected right, and ready to pass inspection. Most building departments, ENERGY STAR programs, and HVAC contractors require both before installation can begin.
What do we need to prepare your Manual J & S
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Floor plans with room dimensions and ceiling heights for every level
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Window & door schedule — size, orientation (N/S/E/W), U-factor, and SHGC
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Full project address (for local climate and design temperature data)
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Duct location: conditioned space, attic, crawlspace, or unconditioned basement
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Known wall, ceiling, and floor insulation R-values or construction assembly details
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Foundation type: slab, crawlspace, or basement with insulation specs
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Equipment brand and efficiency (AFUE/SEER)
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# of HVAC systems being installed and areas/rooms each system will be serving
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Email all these to Info@HeatLoadUSA.com
Why HeatLoad USA?
Since 2008, we've prepared thousands of Manual J & S reports for HVAC contractors, builders, architects, engineers and homeowners across all 50 states. Our reports are accurate, code-compliant and accepted by building departments nationwide.
Certified by ACCA we are one of the few firms qualified to prepare both residential (Manual J) and commercial (Manual N) load calculations.