# HVAC Toolkit — HVAC calcs for all your needs

> HVAC calculations and tools for professionals, combining multiple applications. (iPhone/iPad app by Carmel Software Corporation.)

- Source: https://appshunter.io/ios/app/hvac-toolkit/id354558963 (this page in markdown: same URL + `.md`)
- Developer: [Carmel Software Corporation](https://appshunter.io/developer/317970398)
- Category: Productivity, Business
- Price: $23.99
- Rating: 5.00/5 from 2 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 50 MB
- Languages: American English
- Released: 2010-02-13
- Data updated: 2026-08-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hvac-toolkit/id354558963/reviews.md

## What is HVAC Toolkit?

The HVAC Toolkit app for the iPhone and iPad is the essential app for anyone in the HVAC industry. It includes a combination of many of our stand-alone iOS applications. Individually, the apps cost a total of $70. By purchasing the Toolkit, you pay only $24:

1. HVAC Equipment Locator
2. HVAC PT Chart
3. HVAC Refrigerant Charge
4. HVAC Duct Sizer
5. HVAC Quick Load
6. Psychrometrics
7. Steam Tables
8. Pipe Sizer - Liquid
9. Pipe Sizer - Steam
10. Pipe Sizer - Gas High
11. Pipe Sizer - Gas Low 

This is a universal app that works on both the iPhone and iPad.

The "HVAC Equipment Locator" module allows you to track, share, and customize your equipment nameplate and maintenance data. The version here includes the ability to customize your input screens.

The "HVAC PT Chart" module allows you to easily view the pressure-temperature properties of 75 refrigerants. Think of this app as a digital version of the paper PT charts that you may have carried around with you in the past.

The "HVAC Refrigerant Charge" module allows you to perform superheat and subcool refrigerant charge calculations on-the-fly. This app includes pressure-temperature data for over 75 common refrigerants.

The "HVAC Duct Sizer" module allows you to quickly size one HVAC duct run and a range of duct sizes. You can specify the total airflow in CFM (or L/s), the aspect ratio and one of either the velocity of air or the friction loss per 100 feet (30 meters).

The "HVAC Quick Load" module allows you to perform quick and simple HVAC cooling and heating load calculation analysis. You can specify the building type, total area, and # of people. The results include the total cooling and heating loads and airflows.

The "Psychrometrics" module allows you to easily perform single-state and mixed-air HVAC psychrometric calculations for a wide range of barometric air pressures.

The "Steam Tables" module allows you to calculate the properties of saturated or superheated steam by specifying 2 input properties.

The "HVAC Pipe Sizer - Liquid" module allows you to size a pipe run with many different types of liquids (or fluids), pipe material and fitting types.

The "HVAC Pipe Sizer - Steam" module allows you to size a steam pipe run, and it also includes a bonus steam table calculator.

The "HVAC Pipe Sizer - Gas High/Low" module allows you to quickly size a simple low (less than or equal to 1.5 psi) and high (greater than 1.5 psi) pressure gas piping system by inputting a number of piping and gas properties.

This application includes all of the great features of the individual HVAC iOS applications such as the use of slider controls that allow you to quickly increment or decrement the input values and immediately observe the calculated results. It also allows you to specify different types of liquids, gases, pipe material types, fitting quantities, min and max ranges, and step values.

All of the above modules display units in English or Metric.

Also, all of the above modules allow you to send emails with inputs and results.

The "HVAC Toolkit" application was designed by Carmel Software Corporation, a leader in HVAC design software since 1995. In fact, Autodesk (the makers of AutoCAD) acquired our load calculation software and incorporated it into their leading 3D modeling software called Revit. In addition, Carmel has developed customized apps for organizations such as ASHRAE, Mitsubishi Electric, and Pacific Gas and Electric, amongst others.

We also offer all of the above modules as individual apps for the iPhone/iPad:

1. HVAC ResLoad-J
2. HVAC Psych HD
3. HVAC Duct Sizer
4. HVAC Pipe Sizers
5. Steam Tables
6. Psychrometric Plus
7. Psychrometric LT
8. HVAC Pipe Sizer Plus
9. HVAC Pipe Sizer Gas Plus
10. HVAC Quick Load
11. HVAC Load Plus
12. HVAC Residential Load Calcs
13. HVAC Toolkit Ultimate
14. HVAC ASHRAE 62.1
15. HVAC ResVent 62.2
16. HVAC ASHRAE DFDB
17. HVAC ASHRAE Psych Chart

## Key features

- Equipment tracking and customization
- Refrigerant pressure-temperature charts
- Refrigerant charge calculations
- Duct sizing
- Cooling and heating load calculations
- Psychrometric calculations
- Steam tables
- Pipe sizing for liquid, steam, and gas

## Chart rankings

- #199 in Top Paid · Productivity (US App Store)

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/hvac-toolkit/id354558963/reviews.md

### 5/5 — HVAC

*2020-01-24*

A 🤢 😷 app

### 5/5 — Gran actualización

*2019-01-18, version 4.0*

Es muy de agradecer la adaptación a iphone X.
El poder aprovechar la pantalla grande es muy importante.
Sería muy apropiado aumentar el tamaño de la letra y de los elementos de para verlos mejor.
Gracias.

### 5/5 — Indispensable app

*2014-11-25*

The update is amazing. It now works on my iPhone and iPad. Also, it includes so much more functionality. I use this app everyday.

### 1/5 — a mistake

*2014-06-09*

why cabnot download ，please return my monney

### 4/5 — Useful Tool

*2013-07-06*

This is a useful tool for the field. I would rate it a five but I feel the author owes us an iPad version considering how long the iPad has been around and is more likely to be the device I'd use in the field.

### 5/5 — Great!

*2013-02-08, version 1.6*

I work for an HVAC manufacturer and for fast calculations is very good

### 1/5 — Limitations.

*2013-02-03*

Can't do mixed air calcs with below zero temperatures. Pipe sizing only available for water. Not glycol.

### 4/5 — Stewart T

*2011-07-02*

I have just started using HVAC Toolkit.  I find it useful and easy to use.  I'm pleased I bought it.
Stewart (Engineer in NZ)

### 2/5 — Sub Standard

*2010-09-26*

Disappointed with app performance, it is not a polished product.
Doesn’t save global settings when closed or phone turned off.
Step values don’t appear to have any impact on the output in sizing calculators.
Only really set up for imperial values with no consideration for standard metric sizes.

Expected more for the price and from a company who has been developing software tools for 15 years.

### 5/5 — Lots of functionality

*2010-08-05*

I really like this HVAC app. It has most the functionality that I need out in the field for sizing duct, pipes, doing quick loads, psych calcs, and other stuff.

It looks pretty accurate after doing some comparisons back at the office. I'd like to see some email functionality added to it. Also, how about adding the HVAC Load Plus function, too.

## Frequently asked questions about HVAC Toolkit

### What is HVAC Toolkit?

HVAC Toolkit is a productivity app for iPhone and iPad that bundles 11 specialized HVAC calculation and sizing tools into a single application. It provides a convenient way for HVAC professionals to access essential data and perform complex calculations on the go.

### How much does HVAC Toolkit cost?

HVAC Toolkit is a paid application priced at $23.99. This one-time purchase grants access to all the bundled features, which would cost significantly more if purchased as individual apps.

### What devices does HVAC Toolkit support?

HVAC Toolkit is a universal app designed to work seamlessly on both the iPhone and iPad. It is also compatible with the iPod touch.

### Does HVAC Toolkit have ads?

No, HVAC Toolkit does not contain advertisements. As a paid application, users can expect an ad-free experience.

### How often is HVAC Toolkit updated?

The latest version of HVAC Toolkit is 6.5, and it was last updated on April 5, 2023. This indicates a history of regular updates and maintenance by the developer.

### What kind of calculations can I perform with HVAC Toolkit?

HVAC Toolkit offers a wide range of calculations, including equipment locator, pressure-temperature charts for refrigerants, refrigerant charge calculations, duct sizing, cooling and heating load analysis, psychrometric calculations, steam tables, and pipe sizing for various fluids and gases.

### Can I switch between English and Metric units in HVAC Toolkit?

Yes, HVAC Toolkit supports both English and Metric units across all of its calculation modules. This allows users to work with their preferred measurement system.

### What is the age rating for HVAC Toolkit?

HVAC Toolkit has an age rating of 4+. This suggests that the content within the app is generally suitable for a wide audience, though its professional nature makes it most relevant to adults in the HVAC industry.

## Version history (last 5 releases)

### 6.5 — 2023-04-05

1. Optimized for iOS 16 and iPhone 14
2. Updated the PT Chart and RefCharge modules by adding new low-GWP refrigerant: R-454B
3. Updated help

### 6.1 — 2021-11-24

1. Optimized for iOS 15 and iPhone 13
2. Updated user interface elements for individual modules
3. Updated help

### 5.5 — 2020-08-10

1. Updated the app launch screen per new Apple iOS guidelines.
2. Updated Google Analytics and Crashlytics.
3. Updated launch icons

### 5.0 — 2019-12-03

1. Optimized the user interface for iOS 13 and iPhone 11x
2. Fixed the "negative sign" issue that occurs in iOS 13
3. Fixed issue with not displaying properly in iOS 13 "dark mode"
4. Fixed issue with Pipe Sizer modules not displaying full text in selector controls in iOS 13
5. Updated help

### 4.5 — 2019-09-18

1. Added 5 new refrigerants to the PT Chart and Ref Charge modules including R-450A, R-455A, R-452A, R-452B, R-1233ZD, R-245FA (and all dew/bubble versions)
2. Fixed issue with psychrometric altitude to absolute air pressure lookups in metric mode
3. Updated the user interface to accommodate the latest iPhone X* screens
4. Updated help

## Apps similar to HVAC Toolkit

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HVAC Toolkit Lite](https://appshunter.io/ios/app/hvac-toolkit-lite/id1628371325) | 5.0 (1) | Free | Productivity |
| [YJACK VIEW](https://appshunter.io/ios/app/yjack-view/id1492358956) | 2.8 (18) | Free | Productivity |
| [Pipe Sizer - Water](https://appshunter.io/ios/app/pipe-sizer-water/id1316033381) | 4.8 (10) | $12.99 | Productivity |
| [Plumbing Formulator](https://appshunter.io/ios/app/plumbing-formulator/id303497783) | 4.6 (7) | Free | Productivity |
| [Injection Molding Hub](https://appshunter.io/ios/app/injection-molding-hub/id6743525270) | — | Free | Productivity |
| [HVAC Formulator](https://appshunter.io/ios/app/hvac-formulator/id318898907) | 2.0 (1) | $4.99 | Productivity |

## More apps by Carmel Software Corporation

- [HVAC Duct Sizer](https://appshunter.io/ios/app/hvac-duct-sizer/id317970395)
- [HVAC Pipe Sizer - Liquid](https://appshunter.io/ios/app/hvac-pipe-sizer-liquid/id325069065)
- [HVAC Pipe Sizer - Steam](https://appshunter.io/ios/app/hvac-pipe-sizer-steam/id336112747)
- [Steam Tables](https://appshunter.io/ios/app/steam-tables/id339948012)
- [HVAC Pipe Sizer - Gas Low](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-low/id341688321)
- [HVAC Pipe Sizer - Gas High](https://appshunter.io/ios/app/hvac-pipe-sizer-gas-high/id341828523)

All apps by Carmel Software Corporation: https://appshunter.io/developer/317970398

## Related topics

[hvac software](https://appshunter.io/ios/topics/hvac-software)

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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 2026-08-01.*