Manual J prepared for you.
ACCA-approved residential heat load calculations. Overnight service available. Made in the USA.
What is Manual J?
Manual J is the industry standard for calculating the heating and cooling loads of a residential property. This is the ONLY way, per ALL codes across the USA on how to correctly size the heating and cooling for your home.
It's available as a simple block load calculation and also as a room-by-room analysis that determines exactly how much capacity each space needs based on construction, insulation, window types, orientation, infiltration and climate. Not on rules-of-thumb, "eyeballing" or square-ft rules which are outdated. ONLY Manual J will tell you correctly the loads for a home without oversizing by 50-100%.
​A correct Manual J is the foundation of right-sized equipment, lower utility bills and happier homeowners. It's also required by most building departments before a permit is issued.
What we need to prepare your Manual J
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Floor plans for every level (including basement, if applicable)
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Address of the property
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Measurement of each room and outside walls
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Measurement of all windows and doors
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Known insulation R-values of walls
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Location of equipment and ductwork — basement, conditioned space, attic, garage, etc. If we have to assume, we'll assume worst case
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Email all these to Info@HeatLoadUSA.com
Why HeatLoad USA?
Since 2008, we've prepared thousands of Manual J reports for HVAC contractors and builders 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.