Quick, Certified, Manual D Service

Call us today to discuss your needs:  973-544-6800

  • Your Satisfaction is our #1 priority
  • Next Day Service is available 
  • We service all of the USA
  • Simply send us your floor plans & proposed equipment
  • Over 30-years HVAC experience
  • Certified by ACCA for Manual J and D 
  • Pricing starts at $490.  Call us for a quote for your project

Ready? Send us your floor plan to Info@HeatLoadUSA.com

Call/text us for more information:  973-544-6800


What do we need in order to be able to prepare your Manual J & D?

  • Address of property 
  • Floor Plan for each floor (including basement if applicable) This can be an architectural drawing in PDF or DWG or hand-drawn
  • Measurements of each window & door in each room  
  • Location of equipment and ductwork  - Basement, Conditioned space, Attic Garage, etc.  
  • Your preferred make and model of equipment 
Email all these to info@HeatLoadUSA.com


Call/Text us now to get started:   973-544-6800

Email us your floor plans:  info@HeatLoadUSA.com

We will respond right away, and review what you sent us. If we are good, we will send you an invoice via PayPal. Pay that invoice and we will deliver your report within four business days.  Expedited next-day service is available. 


What Is Manual D? 

​​​Manual D is essentially a sizing exercise for ductwork.  Ductwork must be sized appropriately in order for the whole house to be able to be heated and cooled uniformly.  Poor or no duct design results in rooms and floors that are too hot and too cold. 

The size of the home,  zip code, elevation, summer high & winter low temperatures, exposure to southern and western sun, room function, amount of windows, square feet of a room, which floor it is on, and summer humidity levels  -  all play a function in determining the size and amount of ducts needed for a room.

There is a difference in HVAC design.  For a more thorough HVAC design, we go that extra step.  We design our system so that they run quietly, efficiently, and reliably for years to come.  

A good and properly thought out Manual D is a key component to achieving homeowner comfort, safety, and efficiency.  Our Manual D designs provide you the following:

  • Load calculations for each room
  • CFM (volume of air) needed for each room
  • Size of furnace, heat pump, AC required to satisfy the home
  • Equipment Part numbers for Furnace, Condenser, Coils and/or heat pump
  • Location of central heating/cooling equipment
  • Full duct layout showing each individual trunk, branch, register, vent and all ducts for each zone
  • Short and Long J1 Forms
  •  Summary load forms
  • List of trunks and branches showing length and materials needed
  • Plus more…..

Next Steps

Call or TEXT us:  973-544-6800

Manual J & D Reports

HVAC Ductwork Design

Yes serve ALL of the USA

Call or text us now:  973-544-6800   

email us:  info@HeatLoadUSA.com

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​​Manual J Load Calculation Services   Load Calculation Service  aka heat load services