manual d calculation

manual j and d

duct layout

hvac duct design

hvac design engineer

ductwork design

hvac design

manual d

hvac ductwork design

hvac designer

ductwork layout

hvac ductwork design

residential hvac design

manual d hvac

hvac design

hvac load calculation service

hvac system design

hvac duct design

manual j service

manual d hvac

manual d duct design

manual d residential duct systems

design hvac

hvac engineer

duct layout design

manual j and d calculations

hvac duct layout

hvac design services

hvac design service

hvac system design

duct system design

manual d duct sizing

residential hvac design services


Savoy engineering

j and d design

residential duct sizing

ac duct design

manual d duct design for residential

manual j and d

residential hvac design services

residential duct design

residential hvac system design

basic ductwork design

hvac duct system design

ducting system design

residential hvac duct design

residential duct sizing

manual d load calculation

ductwork layout

mechanical engineering hvac design

manual j s and d

j&d designs

residential ductwork design

manual j d s

hvac design fees

j and d designs

ac duct design

ductwork layout residential

manual j s d

air conditioning system design

designing hvac systems

clean room hvac design

heating duct design

manual j s and d

residential hvac design companies

hvac design calculations

residential hvac duct design

manual j and manual d

hvac duct design services

basement hvac design

ac duct design

residential hvac duct sizing

manual d duct design

duct layout design

hvac residential design

ventilation system design

residential hvac ductwork

ductwork design and installation

hvac design consultants

hvac system design

hvac design company

manual d duct

j&d designs douglas ga

residential hvac design services

furnace ductwork design

duct design services

hvac ductwork design

air conditioning design

duct design service

ac ductwork design

residential hvac design

freelance hvac design

j calculation


hvac duct design

residential mechanical design

ac duct layout

a c duct design

heating and cooling ductwork design

j&d designs

acca manual d duct design

gym hvac design guide

residential hvac ductwork design

hvac design manual

hvac design engineer training

furnace ducting design

hvac systems duct design

residential hvac ductwork design

air duct system design

residential mechanical design

hvac system layout

residential hvac drawings

hvac design engineering companies

furnace ductwork layout

residential hvac ductwork design

duct designer

Professional HVAC Design & Duct Layout Services

Looking for a fully-licensed, insured and certified firm to tackle your load calculations for you? Need someone who listens and understands your need? Get thorough and quality results with HeatLoad USA. We offer professional and reliable design services for a wide variety of residential and commercial needs, working with the dedication and craftsmanship that has earned us a reputation for excellence.

Includes Manual J, Manual S and Manual D

​Manual J, D & S includes all the service and reports you need when you are laying new ducts and installing new systems. Our reports include a full Manual J report (load calculation), Manual D - full duct layout and design and Manual S (system selection) picks out the correct part numbers most closely tailored your specific project.

All these reports are complaint with ACCA Manual J 8th Edition, ACCA Manual S specifications and ACCA Manual D reports. 

No Call-backs.  Our duct designs are carefully thought out, so that they provide a "transparent" end-user experience.  That is the system will not be noisy, there will not be hot & cold rooms, and our system design provide the maximum de-humidification to provide the maximum comfort experience for your customers (or yourself in the case of the homeowner). 

Why Heat Load USA? 

We have combined over 80 years of HVAC design, install and troubleshooting.  Everything we do conforms to national ACCA 8th edition and your local codes.  The software we use is Wrightsoft - the best in the industry -  which means the reports you get are also the most accurate, robust and most professional.  Nothing less.

We are certified by ACCA in Quality HVAC design so you can rest assured that all of our Manual J, D & S are done to comply with national ACCA Manual J, D & S standards. 

Our reports include all of the following sections:  

  • Full duct design and duct layout
  • Full duct sizing showing each trunk, branch, materials and size  (you can customize and tell us in advance)
  • Complete loads and CFM for each room and vent
  • ACCA Short and Long J-Manuals and J-Forms
  • Equipment selection (you tell us the brand and efficiency and we will include the furnace/heatpump coil and condenser on the report
  • Equipment Manual -S report and ACCA Residential Examiner Review Form
  • Detailed friction rate and static pressure (loss) chart
  • Complete duct materials and duct lenghts
  • Detailed building analysis and much more

Call/Text Us Now: 973-544-6800



​​​​​ What Do We Need In Order To Prepare Your Manual J, D & S?

  • 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

  • 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 HVAC system

  • Equipment - Furnace, Condenser and Coil Model numbers
  • 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. ​

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




 What is Manual J, Manual D and Manual S?

 Manual Jis the heat load calculation for the whole house

 Manual D is the layout and sizing of your all NEW duct-work. This is  typically only required when you are installing new ductwork, as in an addition, new construction etc. We layout each individual room in the house and required CFM. You tell us where you want the ducts and registers OR we lay them out for you.

 Manual S is the selection of equipment based on the heat load of the house.  ONCE we have figured out the total heat load (Manual J) on the house, we will provide you the full AHRI (furnace model, condenser and coil numbers based on which line you you are using or tell us what you want to use and we will do our best to make that match).

 What if I Only Need Manual J & S?   No problem. We can do that too! Unless you are installing new ductwork, you only need a Manual J and occasionally, Manual S. 

Do You Provide Next Day Service? In most

 Does Your Work Conform to ACCA Requirements? Absolutely! All the work we do confirms to ACCA, and we stand behind our heat load and duct sizing reports. We guarantee that it will pass your local building inspections. You provide us the necessary drawings of the home, and equipment you want to us.  Also,  some townships may require additional licensing/certifications that are outside our scope of work. 

Questions?  Call/Text us:   973-544-6800


Manual D, ​HVAC Design, Duct Layout

Prepared For You.

Manual J, D and S

Heat-Load USA

ACCA Manual J load calculation - Manual S - Manual J HVAC - Manual J Calculation Service - Heat Load Calculation - Residential Load Calculation - Manual J Services - What is a Manual J - manual j hvac residential load calculation

- 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