Amply

Introduction to Manual J load calculations and why they are important

Overview of Manual J

Set the door construction assumptions so door heat losses and gains are accurate

Doors - verify and edit

Set the construction, stud size and material, cavity and board insulation, and exterior finish — and classify each wall as exterior, garage partition, or below grade — so wall heat…

Walls - verify and edit

Manual J is designed to be used only for residential buildings that have three or fewer above-grade stories

Can I use Manual J for commercial buildings?

A detailed and accurate Manual J will almost always result in lower load calcs than a rule of thumb method

Why does my Manual J calculation look lower than I expected?

How design conditions are set automatically and how they can be adjusted per local code requirements

Design conditions - automatic settings and making edits

Special considerations and options for handling fully below-grade or partially below-grade walls as well as "walk-out" basements

Below grade walls - verify and edit

Set the type, frame, assembly, glass, overhang, shading, and foreground reflectance so window heat gain and loss are calculated correctly.

Windows - verify and edit

How to set infiltration load calculations with the tightness or blower door method

Air infiltration - verify and edit

How to model losses and gains for ductwork in unconditioned space

Ducts - verify and edit

Set the construction, attic venting, roof material, and insulation so ceiling heat gain and loss are calculated correctly.

Ceilings - verify and edit

Set the construction type, tightness, wall insulation, floor insulation and finish so floor heat transfer is calculated correctly.

Floors - verify and edit

Learn more about occupant, appliance and plant loads found in the Building Profile

Internal loads - verify and edit

Use a flash light, lighter or laser to quickly verify glass type

How to determine if you have "low-e" or "clear" windows

Learn how we set starting assumptions using the year built and location of a home

Smart starting assumptions for insulation, windows and air leakage

Learn how to view the room orientation and edit window direction

Room orientation and window direction

Eric Fitz

Matt Lowes

Verify and edit key home construction details for accurate designs

Manual J (Load Calculations)

Find answers and get help from Intercom Support and Community Experts

Conversations you've started through the messenger will appear here.

No conversations created by you

Try using different keywords or checking for typos.

No conversations found

Title

This site employs cookies and other technologies that we and our third party vendors use to monitor and record personal information about you and your interactions with the site (including content viewed, cursor movements, screen recordings, and chat contents) for the purposes described in our Cookie Policy. By continuing to visit our site, you agree to our {websiteTermsLink}, {privacyPolicyLink} and {cookiePolicyLink}.

This site uses cookies and similar technologies ("cookies") as strictly necessary for site operation. We and our partners also would like to set additional cookies to enable site performance analytics, functionality, advertising and social media features. See our {cookiePolicyLink} for details. You can change your cookie preferences in our Cookie Settings.

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See our {cookiePolicyLink} for more details.

Advertising cookies are set by our advertising partners to collect information about your use of the site, our communications, and other online services over time and with different browsers and devices. They use this information to show you ads online that they think will interest you and measure the ads' performance. Social media cookies are set by social media platforms to enable you to share content on those platforms, and are capable of tracking information about your activity across other online services for use as described in their privacy policies.

These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.

These cookies are necessary for the website to function and cannot be switched off in our systems.

These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site.

You have the right to opt out of the sale of your personal information. See our {cookiePolicyLink} for more details about how we use your data.

Your Privacy Choices

We use cookies to enhance your experience. You can customize your cookie preferences below. See our {cookiePolicyLink} for more details.

Cookie Settings

Empty Help Center

Uh oh. That page doesn’t exist.

Home

Search results

Disappointed

Neutral

Smiley

Thinking...

Searching through sources...

Analyzing...

Tickets submitted through the messenger or by a support agent in your conversation will appear here.

No tickets created by you

No tickets found

Track the progress of all tickets and conversations related to your company.

Customer Portal.

Track the progress of all tickets related to your company.

Tickets portal.

{assigneeName} needs more information from you

Tickets

No access to tickets portal

Search

Skip the search. Describe what you’re trying to do and get a grounded answer.

Browse articles and guides in this topic.

Create your workspace and invite the people you work with.

Set up your account

Build your first workflow and watch it run end to end.

Ship something

Connect the tools your team already uses to bring data in.

Connect your stack

A quick lap of the product so you know where everything lives.

{appName} in 60 seconds

This prototype demo is aware that you are reading “{title}”. It can point you back to the current article, but a production article-aware Fin contract is still follow-up work.

Prototype article-aware answer

Because you already asked about invitations, this prototype demo can add the follow-up: use the role selector before sending each invite to limit access to the teammate responsibilities.

Prototype role-limiting follow-up

This prototype demo suggests starting with your workspace profile, inviting the team members who need access, and then connecting the integrations you use.

Prototype getting-started answer

In this prototype demo, integrations are configured from workspace settings. Choose the integration, connect the account, and review the enabled permissions.

Prototype integrations answer

In this prototype demo, invite teammates from workspace settings, then choose the access each teammate needs before sending the invitation.

Prototype invite-team answer

This prototype demo does not have a scripted answer for that question yet. Try asking how to invite your team or open a source article. No production Fin API was called.

Prototype answer unavailable

I’ve got this page open. Ask me anything about it and I’ll answer from the docs.