Manual J

Load Calculation Service

Licensed - Fast - Convenient

WHAT IS A MANUAL J?

Manual J is the ACCA (Air Conditioner Contractors of America) approved method of calculating
room-by-room and whole house cooling loads.

manual-j-calculation

Replacing a 10- to 15-year-old Heating & Air Conditioning System with a properly sized one can save you as much as 30-40% on your Energy bill. The only accurate way to properly size a replacement Air Conditioning & Heating system is to calculate the actual heating or cooling load by completing a Manual J based load analysis.

The HVAC (Heating, Ventilation, and Air-Conditioning) systems not only consume huge amounts of a home’s total energy budget, but also impact the comfort and well-being of the occupants more than any other system in a house. Since these systems play such a large role in a home’s performance, it’s important that they receive enough “design” attention to make sure they’ll work as intended.

If you need a Commercial Heat Load Calculation – Manual N [Click Here...]

What a Manual J calculates

It is used for determining the amount of heat the house loses in winter and gains in summer.


This procedure may be done room-by-room for the whole house, which allows you to determine how much conditioned air, in cubic feet per minute CFM each room needs for both heating and cooling.

It factors in all the surfaces of the building envelope, with their areas and insulation levels. Each wall is given its proper orientation, as well as the windows and doors attached to them.

Additional important data to include is the location and tightness of the duct system, the infiltration rate of the house, the internal loads (appliances and people), and area where the house is located.

The results specify the BTUH of heat lost by each room in the winter and gained in the summer.

The heat gain is split into two parts:

  • Sensible (related to temperature)
  • Latent (related to humidity).



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Avoid Oversizing A/C Systems

It’s a pretty safe bet that the vast majority of air conditioners are oversized


ACCA developed its Manual J protocol for heating and cooling load calculations to help HVAC contractors put in correctly sized equipment, but there are a couple of problems:

  • First: most contractors don’t do the load calculations for every new piece of equipment they install. They use rules of thumb instead.
  • Second: when they do the Manual J, they sometimes don’t do them correctly.
We’ve looked over a lot of Manual J reports because the ENERGY STAR homes program actually requires them.
ENERGY STAR doesn’t require a whole lot. Mainly they want to check that the following info is correct:

  • Location
  • Outdoor & Indoor design temperature
  • Orientation
  • Windows
  • Number of People
  • Ducts


IN SUMMARY

Get a Manual J HVAC Load Calculation done by an HVAC professional




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OUR SERVICE

We provide a complete Manual J HVAC Load Calculation generated by our Experts using ACCA approved Software
Manual J is based on the plans and specifications provided. Usual turnaround time is 1-2 business days.

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What Makes us Different


HVAC EXPERT TEAM

Our Calculation Team includes HVAC Licensed contractors with 30 years+ experience & Wrightsoft HVAC Calculation Certified Training.

APPROVED SOFTWARE

Our experienced team uses Wrightsoft© (An ACCA Partner company since 1986) for all Manual J Calculations.

FAST TURNAROUND

Manual J’s are usually completed between 1-2 business days upon receipt of all information required on the home.

UP 2 REVISIONS

If you need to make any modifications to your project, we give you up to 2 minor revisions to the final Manual J.


How It Works

 YOU ORDER

You submit all plans and specifications on your project via our electronic form, phone or email.

 WE GENERATE

A member of our team of Professionals generates The Manual J with our ACCA approved HVAC calculation Software.

 WE DOUBLE CHECK

A second member of our Manual J team double checks the generated Manual J to ensure accuracy.

 WE DELIVER

A complete Manual J based on the information provided, gets delivered into your email.


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“Manual J Calculated by Licensed Contractors & Manual J Experts.”

MANUAL J CALCULATION PRICES

Manual J Calculation for Existing Residential Homes or New Construction Projects.

New House Installation$99.00

  • Manual J - HVAC Load Calculation for Residential New Installation
  • + $59.00 Additional System
  • Up to 2 Minor Revisions
  • 1-2 Business Days Usual Turnaround Time
  • 800-810-3280 Ext 102
    Call Us Today to Order

Room By Room Calculation$129.00

  • Manual J - HVAC Room By Room Load Calculation for Residential Installation
  • + $89.00 Additional System
  • Up to 2 Minor Revisions
  • 1-2 Business Days Usual Turnaround Time
  • 800-810-3280 Ext 102
    Call Us Today to Order
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DOWNLOAD FULL MANUAL J SAMPLE

 

ABOUT US

At Webreps, we can facilitate any project from concept to implementation.

Our Heat Load Calculation team is dedicated to staying ahead of the curve and continually update versions and resources. With our unique skill-set and perspective we are able to solve any issues that may arise. We are a service driven organization and realize our customers needs are the most important.


Our team

Leave it to the Professionals


Craig

Sr. Building Analyst

Craig has more than 30 years experience in the HVAC industry. He is a State licensed contractor with an A A S Degree in HVAC. His many years of field experience as well as design experience makes him ideal to help you with your design process.

    Josh

    Design Technician

    Josh has an A.S. Degree in Air Conditioning & Refrigeration, 12+ years Experience in the HVAC industry & 3+ Years performing Manual J Calculations

      Andy

      Architect

      Andy has a Bachelor in Architecture with 3+ years experience with Autocad and other Architectural Drawing & 3d Modeling Software.

        Bob

        Architect

        A Licensed Architect and graduate of Kansas State with years of both Residential & Commercial Building Design & Construction.



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          Reviews

          Our Goal Is To Provide Excelent Service

          Fast Service & Great Customer Support

          ★★★★★
          Craig was really knowledgeable & helpful. We received our Manual J in a timely manner and were able to get the job done properly. Will purchase again any time I need another one.”
          - John Miller

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          Contact Info

          manualj@webrepshvac.com

          800-810-3280 Ext. 102

          WebREPS, LLC
          1892 Commerce Ave
          Vero Beach, FL 32960