HVAC Load Calculator Manual J

HVAC Load Calculator Manual J

BTU Sizing for Contractors

29 ratings
1 review
$1.99 Free
In-App Purchases

Lowest price: Free 6 months ago (-100%)


Price history


Details

  • Released
  • Updated
  • February 2, 2026
  • July 5, 2026

Features

HVAC Load Calculator Manual J screenshot #1 for iPhone
HVAC Load Calculator Manual J screenshot #2 for iPhone
HVAC Load Calculator Manual J screenshot #3 for iPhone
HVAC Load Calculator Manual J screenshot #4 for iPhone
HVAC Load Calculator Manual J screenshot #5 for iPhone
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About

This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.

Multiple accuracy levels (Simple, Moderate, Pro)
Offline-ready calculations
Professional PDF report generation
Site photo documentation
International and US modes
Metric unit support
Show original description

What's New in HVAC Load Calculator Manual J

1.13.0

July 5, 2026

-Client & job details — add client name, site address, job number, and notes to any project; they appear on the PDF report automatically. -Report revisions — reports are now stamped with the job number, revision (Rev 1, Rev 2…), and generation date, so everyone knows they're looking at the latest version. -Input sanity check — if a calculated load looks unusually high or low for the floor area, the app quietly suggests double-checking your inputs (never shown on client reports).

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Subscription plans

Annual Pro with Trial

Full access to all HVAC load calculation features

$4.991 Year
7 Days trial
How to cancel HVAC Load Calculator Manual J subscription ⁉️

User reviews

ONLY WORKS IN SIMPLE MODE

If you try to add moderate inputs, like actual sq ft of windows per direction, it kicks out an error and asks you to reload app. This happened to me three times. I’m done. 😡 DO NOT DOWNLOAD! You DO NOT need the headache.

Response from developer

Hello! We are sorry you ran into this issue! We connected over email yesterday and were able to push an update the same night to get everything working correctly for all users. We really appreciate you reaching out. To catch issues like this faster in the future, we're adding an opt-in feature that lets you anonymously share bug reports. You were actually the first to pass along an issue, so your feedback made the app better for everyone. Thanks for taking the time.

Developer apps

FAQ

What is HVAC Load Calculator Manual J?

HVAC Load Calculator Manual J is a mobile application designed for HVAC contractors to perform professional load calculations. It follows ACCA Manual J 8th Edition methodology for accurate heating and cooling load estimations.

Does HVAC Load Calculator Manual J have ads?

No, HVAC Load Calculator Manual J does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features and subscription plans.

What are the different calculation modes in HVAC Load Calculator Manual J?

HVAC Load Calculator Manual J offers three modes: Simple Mode for quick estimates, Moderate Mode for standard jobs with component-level factors, and Pro Mode for full Manual J physics and detailed analysis.

Can HVAC Load Calculator Manual J be used offline?

Yes, HVAC Load Calculator Manual J is an offline-first application. All calculations run locally on your device, meaning you can use it even without a signal, making it ideal for field work.

What subscription plans are available for HVAC Load Calculator Manual J?

HVAC Load Calculator Manual J offers several subscription plans, including Annual Pro options starting at $4.99/P1Y with a 7-day free trial. There are also Pro versions available for $9.99/P1Y and $19.99/P1Y.

What devices support HVAC Load Calculator Manual J?

HVAC Load Calculator Manual J is available for iPhone, iPad, and iPod. The app is optimized for different screen sizes, including specific layouts for iPads.

How often is HVAC Load Calculator Manual J updated?

The latest version of HVAC Load Calculator Manual J is 1.9.8 (58), which was last updated on March 26, 2026. Updates typically include new features, performance improvements, and bug fixes.

What is the age rating for HVAC Load Calculator Manual J?

HVAC Load Calculator Manual J has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain content that would be inappropriate for children.