* HVAC Design  * Manual D

*Duct Design

Professionally Prepared For You

Valid in All States in The US

Fully compliant with ACCA standards

Call US Now:  973-544-6800   or email us: info@HeatLoadUSA.com

Manual D is the layout and sizing of your all NEW duct-work. This is typically required when you are installing new ductwork, as in an addition, new construction etc.

Manual D Calculation :  We lay out each individual room in the house and size the ducts to meet the required CFM of each room.   

Manual J & D Calculations: You can certainly tell us where you want the ducts and registers OR we lay them out for you.

Why Choose Heat Load USA?

Unlike others, we are actual HVAC contractors.  We do this for a living. We install heating and cooling systems.  We install new ducts, and we do both residential and commercial work.  So rest assured, we understand you, your needs and we know where you are coming from.  This means we speak your language and we will take care of you. 

100% Approval Rate.  All of our Manual J, D & S work is guaranteed to pass local township ACCA-heat load related requirements, all over the US. Weather you are in Maine, Virginia Florida or California.  You must provide us the drawings and comply with other regulatory requirements.  We serve all of the USA. We can help you. 

Rapid Service. Our Standard turnaround 4-business days.  Next Day Service is also available

We are here to serve you, so feel free to call us any time:  973-544-6800        


  What Do We Need In Order To Prepare Your Manual D?

  • Floor Plan for each floor (including basement if applicable)
  • Sq ft of Windows on each side, on each floor
  • Sq Ft of doors on each side, on each floor
  • How you want your ducts laid out - Ideally your rough sketch of the ducts
  • Address of property 
  • Any known insulation levels in the home
  • 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
  • Email all these to 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 48 hours. ​

                         Questions?  Call Us:   973-544-6800
                       Email:  Info@HeatLoadUSA.com

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

Heat-Load USA

Design HVAC - Design Air Conditioning - Design of Air conditioning systems

- load calculation - Manual N - Commercial load calculation = HVAC ENGINEERS - HVAC CONSULTANTS

- ACCA Manual N Commercial load calculation - Manual D - Manual D calculation - Manual J & D Calculations