# HVAC Load Calculator Manual J — user reviews

> 2 indexed App Store user reviews of HVAC Load Calculator Manual J by Mike Watson, rated 4.80/5 from 34 ratings.

- Source: https://appshunter.io/ios/app/hvac-load-calculator-manual-j/id6758120488/reviews
- App overview in markdown: https://appshunter.io/ios/app/hvac-load-calculator-manual-j/id6758120488.md
- Rating breakdown: 5★ 28 · 4★ 5 · 3★ 1 · 2★ 0 · 1★ 0

## Most critical reviews (2 lowest-rated)

### 1/5 — ONLY WORKS IN SIMPLE MODE

*2026-04-01*

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.

**Developer response:** 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.

### 5/5 — It’s fast, it’s easy and from doing it manually, it’s actuate!

*2026-07-28*

The title says it all.

**Developer response:** Thank you for the great feedback! We plan to continue adding features to make it more useful to you and the rest of our users. 

Feel free to submit any ideas for new features to mike@hvacloadcalculator.online

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*