Our reports are ACCA Manual J 8th Edition Certified, using Wrightsoft

A room-by-room calc is a method for determining the heating and cooling needs of each room in a home. This calculation is more accurate than a block load calculation, which determines the heating and cooling needs for the entire home.

This is required if you plan to zone the home with dampers or equipment, and if you need to complete Manual D duct design calculations.

At minimum, we will need the below information emailed to: [email protected]

  • Detailed Floor Plan/Sketch for each floor (including basement if any portion is finished)
  • Address of property
  • Known insulation R-value of walls
  • Known insulation R-value of Ceilings/Floors
  • Characteristics of Windows
  • Location of equipment and ductwork - Basement, Conditioned space, Attic Garage, etc.
  • Internal gains to apply to each room (location of people, adjustments for abnormal equipment or lighting, etc.)

We provide Manual J calculation services nationwide. Our pricing includes one revision, and our turnaround is typically less than 5 working days.

Please see the confirmation email with a Site Survey Form and additional information.

HVAC Pro Blog LLC serves Residential contractors, builders, architects, and engineers only. Sorry, we do not offer Commercial Load calculations, and we prefer not to work with homeowners directly - instead, support your design professionals!