Manual J Quotes
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Load calculations and duct design

Get the Manual J your permit requires

Many building departments require a Manual J load calculation with HVAC permits. Describe your project in 2 minutes and HVAC designers get back to you.

  • Free, no obligation: you decide whether to follow up.
  • No more than 3 professional(s), matched to the service and your area: no mass solicitation.
  • Your contact details are shared only with your consent, which you can withdraw at any time.

Describe your project

About 2 minutes Free No obligation

Step 1 of 4 What do you need?
Step 2 of 4 Tell us about your project
Project type
Calculations needed
You are
Number of homes (optional)
Step 3 of 4 Where and when?
When would you like to start?
Add details (optional)

Do not enter your contact details here: they are requested in the next step.

Step 4 of 4 How can professionals reach you?

US phone number, mobile or landline.

Your contact details are shared with no more than 3 professional(s), and only with your consent below.

Free for you. You are free to accept or decline the professionals' proposals.

Your situation

What do you need?

Simple and transparent

How it works

  1. You describe your project

    Service, location, timeline and a few details. The request is free for you.

  2. We review the request

    An incomplete or inconsistent request may need more details or may not be shared.

  3. No more than 3 professional(s)

    With your consent, the request is offered to verified professionals serving your area. They pay to access it.

  4. You choose freely

    Professionals contact you directly. You are under no obligation to accept any quote.

Full transparency

This service is free for the person making the request. It is paid for by professionals: they pay to access requests that match their skills and service area. A request is shared with no more than 3 professional(s), and only if you agreed. We do not perform the services shown ourselves and do not recommend one professional over another.

Learn more about how the service works

Why use our service

One request, professionals from your area

  • Save time

    Instead of searching for and calling several companies, you describe your project once.

  • Professionals near you

    Your request is only offered to professionals who serve your area and offer this service.

  • You stay in control

    No more than 3 professional(s), no obligation to accept a quote, and your data can be deleted at any time.

Regulations

Good to know before you ask

The residential code requires heating and cooling equipment to be sized from loads calculated with ACCA Manual J or an equivalent method, and many building departments ask for the report with the permit.

Have plans, window details and insulation levels ready. We do not prepare calculations ourselves and do not show prices.

Near you

Local pros in your city

For every state, county and city: official public figures and one free request sent to pros who serve your area.

See all locations

FAQ

Frequently asked questions

What is a Manual J?

The ACCA standard method to calculate a home's heating and cooling loads, room by room.

Is it required?

The residential code requires equipment sizing from Manual J or an equivalent; enforcement varies by building department.

What information is needed?

Plans, orientation, window types and sizes, insulation levels and air tightness assumptions.

All frequently asked questions

Ready to order your calculations?

Describe your need in 2 minutes. It's free, with no obligation.

Describe my project

Describe my project, it's free