What is Manual J, S, and D ?
Think of the Manual J S & D as the architectural plans for your HVAC system(s). Designed properly and installed as designed, will result in years of greater comfort, greater energy efficiency, fewer mechanical breakdowns, and lower utility bills. You will be spoilt!
Manual J S & D incorporates a load calculation, correct equipment selection and finally, lays out the ductwork, sizes the ductwork correctly along with registers. This ensures that the right amount of heating and cooling gets to the right room.
Small room, fewer ducts and smaller ducts. Large room with lots of windows? No problem, all have been accounted for.
The complete HVAC design package combining Manual J (load calculation), Manual S (equipment selection), and Manual D (duct design) is code nationwide. This is the most common requirement for new construction permits and ENERGY STAR / HERS certification. Ordering together saves time and ensures all three reports are internally consistent.
What we need to prepare your Manual J,S, and D
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Floor Plan for each floor (including basement if applicable)
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Sq ft of Windows on each side, on each floor
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Sq Ft of doors on each side, on each floor
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Address of property
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Any known insulation levels in the home
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Location of equipment and ductwork - Basement, Conditioned space, attic, garage, etc. If more than one system, we need to know the coverage area and location of each HVAC system
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Equipment - Furnace, Condenser, and Coil model numbers
Why HeatLoad USA?
Since 2008, we've prepared thousands of Manual J,S, and D 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.