# IN HVAC Calculator — HVAC Calculator & Reference

> HVAC inspection reference and calculator for home inspectors. (iPhone/iPad app by Gregory Enterprises.)

- Source: https://appshunter.io/ios/app/in-hvac-calculator/id1219008229 (this page in markdown: same URL + `.md`)
- Developer: [Gregory Enterprises](https://appshunter.io/developer/1157657878)
- Category: Utilities, Productivity
- Price: Free
- Rating: 4.20/5 from 11 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 27 MB
- Languages: American English
- Released: 2017-03-31
- Data updated: 2026-08-15
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/in-hvac-calculator/id1219008229/reviews.md

## What is IN HVAC Calculator?

Inspector Nation presents a general reference application to provide insight into the world of HVAC equipment inspection. It is never good practice to mention the exact age or tonnage rating in the home inspection report, but having a reference point of age and size gives the home inspector confidence to map out the inspection and set the tone for the report. 

This application will aid the inspector by providing several HVAC-related inspection calculators as well as guidelines for approximate values for (1) equipment circuit requirements, (2) air conditioner tonnage based on the model number, (3) HVAC manufacture date, and (4) combustion air requirements.  

Contact us if you'd like to request a feature for a future release!

## Key features

- Equipment circuit requirements calculator
- AC tonnage estimation by model number
- HVAC manufacture date lookup
- Combustion air requirements guide
- General HVAC reference information


## Frequently asked questions about IN HVAC Calculator

### What is IN HVAC Calculator used for?

IN HVAC Calculator is a reference tool for home inspectors. It provides calculators and guidelines to estimate HVAC equipment age, tonnage, circuit requirements, and combustion air needs, aiding in report writing.

### Does IN HVAC Calculator have ads?

No, IN HVAC Calculator is ad-free, offering an uninterrupted experience for users.

### Is IN HVAC Calculator available on Android?

Currently, IN HVAC Calculator is available for iPhone and iPad, but not for Android devices.

### How often is IN HVAC Calculator updated?

The app was last updated on April 19, 2024, indicating active development and maintenance.

### What is the user rating for IN HVAC Calculator?

IN HVAC Calculator has a rating of 4.2 stars based on 11 user reviews.

### Can I request new features for IN HVAC Calculator?

Yes, the developers encourage users to contact them with feature requests for future releases.

### What is the age rating for IN HVAC Calculator?

IN HVAC Calculator is rated for ages 4 and up, making it suitable for a wide audience.

### What information can IN HVAC Calculator provide about HVAC equipment?

It can help estimate equipment circuit requirements, air conditioner tonnage based on model number, HVAC manufacture date, and combustion air requirements.

## Version history (last 5 releases)

### 2.0.3 — 2024-04-19

Minor bug fixes

### 2.0.2 — 2024-04-17

Minor bug fixes

### 2.0.1 — 2023-10-13

Updated UI, Minor Bug Fixes

### 2.0.0 — 2023-10-13

Updated UI, Minor Bug Fixes

### 1.0.1 — 2018-11-03

Bug Fixes

## Apps similar to IN HVAC Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Duct Calculator S&P](https://appshunter.io/ios/app/duct-calculator-s-and-p/id1096043356) | 5.0 (1) | Free | Utilities |
| [Bluon HVAC](https://appshunter.io/ios/app/bluon-hvac/id1357521880) | 4.8 (4,450) | Free | Utilities |
| [Duct Calculator Elite](https://appshunter.io/ios/app/duct-calculator-elite/id665701601) | 4.8 (231) | $9.99 | Utilities |
| [Digiduct](https://appshunter.io/ios/app/digiduct/id6738926359) | 4.6 (11) | Free | Utilities |
| [AC Calculator - HVAC Sizing](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761) | 4.8 (20) | Free | Utilities |
| [Allday HVAC Calc](https://appshunter.io/ios/app/allday-hvac-calc/id6446276144) | 5.0 (1) | Free | Utilities |

## More apps by Gregory Enterprises

- [RadonPRO](https://appshunter.io/ios/app/radonpro/id1157657879)
- [Microwave Leak Detector](https://appshunter.io/ios/app/microwave-leak-detector/id1163814470)
- [IN Pocket Reference](https://appshunter.io/ios/app/in-pocket-reference/id1175500008)
- [IRBpro Companion Application](https://appshunter.io/ios/app/irbpro-companion-application/id1181147557)
- [IRB Contracts](https://appshunter.io/ios/app/irb-contracts/id1270175092)

All apps by Gregory Enterprises: https://appshunter.io/developer/1157657878

## Related topics

[in hvac calculator](https://appshunter.io/ios/topics/in-hvac-calculator) · [hvac calculator](https://appshunter.io/ios/topics/hvac-calculator) · [cfm calculator](https://appshunter.io/ios/topics/cfm-calculator) · [hvac calculator load pro](https://appshunter.io/ios/topics/hvac-calculator-load-pro)

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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 2026-08-15.*