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Introduction to Manual J load calculations and why they are important

Manual J - Overview

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

Design conditions

Infiltration load calculations with the tightness or blower door method

Air Infiltration

How to model losses and gains for ductwork in unconditioned space

Duct loads

Learn how to add one or many skylights to any room with a few taps

How to add a skylight to a room

Generate a Manual J report with a few taps and share or upload

Create, review and export Manual J reports

Background on how CFMs are calculated and how they should (and should not) be used

Approximate airflow CFMs for cooling or heating

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

Smart starting assumptions for insulation, windows and air leakage

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

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

Eric Fitz

Load Calculations (Manual J)

Find answers and get help from Intercom Support and Community Experts

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