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Quick, Certified  and Economical Manual J and D Service

We are licensed and certified to provide Manual J & D services nationwide.  We have provided these design services since 2009 and have completed literally tens of thousands of load calculations and HVAC designs all over the US.   

Wheather its a small 1,000 sq ft home, an addition or brand new 10,000 sq ft home with eight systems we are here to service you. 

We provide you professional, quality services that you can count on and take to the local building department for your permits. 

Our Manual J & D service incudes load calculation and a full duct layout including floor plans, duct sizes, register locations, summary reports and much more. 

Our Fees start at $350 and go up from there. Our normal turnaround is four business days and we offer NEXT-Day services also. 

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

Email us your floor plans:

​What Is Manaul 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 floor 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 an 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…..

Optional: Complete inventory list needed to purchase materials for the job. This is particularly useful for homeowners and DIYers

Next Steps

Call or TEXT us:  973-544-6800


What We Need In Order to be able to prepare Your Manual J & D?

HVAC Design   Manual D

Duct Layout & Sizing

Professionally Prepared For You

Yes serve ALL of the USA including

Texas, Colorado, Virginia and NY/NJ/MD

Call or text us now:  973-544-6800   email us:

  • ​​Manual D
  • Manual D Calculation
  • Manual J & D Calculations

* 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 windows in each room  

* Sq Ft of each door

* Your preferred duct layout (if you have one)

* R-value of insulation in the wals and attic 

* Location of equipment and ductwork  - Basement, Conditioned space, Attic Garage etc.  

* If more then one system, we need to know the coverage area and location of each system

* Your preferred brand of equipment 

* Preferred SEER rating of AC

* Preferred efficiency of heating system 

* Type of heating system: Furnace, heat pump or straight electric coils

Email all these to  

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.  Expidited next day service is available. 

Ready to get started?  Call/Text Us:   973-544-6800


​​Heat-Load USA

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