# HVAC Toolkit Ultimate — Endless HVAC Functionality

> All-in-one HVAC utility suite for calculations, sizing, and equipment management. (iPhone/iPad app by Carmel Software Corporation.)

- Source: https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247 (this page in markdown: same URL + `.md`)
- Developer: [Carmel Software Corporation](https://appshunter.io/developer/317970398)
- Category: Productivity, Business
- Price: $59.99
- Rating: 3.00/5 from 4 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 59 MB
- Languages: American English
- Released: 2010-09-29
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247/reviews.md

## What is HVAC Toolkit Ultimate?

This may just be the only HVAC app you will ever need.

The HVAC Toolkit Ultimate from Carmel Software is a universal app that works on both the iPhone and iPad. It is the essential app for anyone in the HVAC industry. It is a compilation of most of the individual iPhone and iPad applications offered by Carmel Software plus bonus software.

If you bought each of these apps separately, it would cost more than 2 times what the price of this app is. It includes:

1. HVAC Residential Load Calc HD (iPad version)
1. HVAC Residential Load Calcs (iPhone version)
1. HVAC Equipment Locator
2. HVAC PT Chart
3. HVAC Refrigerant Charge
4. HVAC Duct Sizer
2. HVAC Quick Load
6. ASHRAE Ventilation Calcs (iPhone version)
7. Psychrometrics
8. Steam Tables
9. HVAC Pipe Sizer - Liquid
10. HVAC Pipe Sizer - Steam
11. HVAC Pipe Sizer - Gas Low
12. HVAC Pipe Sizer - Gas High

The "HVAC Residential Load Calcs" module allows you to perform comprehensive HVAC block and room-by-room load calculations for small commercial and residential buildings. You can easily use this module out in the field by taking advantage of the simplicity and power of the iPhone or iPad, and then email results back to your office.

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 (this is usually an in-app purchase on the free stand-alone version of Locator, but it is included here).

The "HVAC PT Chart" module allows you to easily view the pressure-temperature properties of 100 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 100 common refrigerants including azeotropic (bubble/dew) versions of refrigerants.

The "HVAC Duct Sizer" module allows you to perform quick and simple duct sizing analysis. 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 results include both the exact and rounded height and width (or diameter) dimensions and the calculated velocity and friction loss. In addition, you can calculate for a range of duct sizes by specifying minimum and maximum friction loss and airflow values. 

The "HVAC Quick Load" module allows you to quickly calculate total heating and cooling loads for a wide variety of building types.

The "Psychrometrics" module allows you to easily perform single-state and mixed-air HVAC psychrometric calculations for up to 23 different combinations of input parameters.

The "Steam Tables" module allows you to calculate the properties of saturated or superheated steam by specifying 2 input properties. This module is also part of the "Pipe Sizer - Steam" module discussed below.

The "ASHRAE Ventilation Calcs" module allows you to perform comprehensive minimum ventilation calculations for a wide variety of commercial buildings based upon ASHRAE Standard 62.11-2007 and 2010/2013 versions.

The "HVAC Pipe Sizer - Liquid" module allows you to size a pipe run for 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 Low and Gas High" modules 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.

All values can be displayed in English (IP) and Metric (SI) units.

We also offer all of the above modules as individual apps, too.

## Key features

- Residential load calculations
- Equipment nameplate data tracking
- Refrigerant pressure-temperature charts
- Superheat and subcool calculations
- Duct and pipe sizing analysis
- Psychrometric calculations
- Steam table property calculations

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/hvac-toolkit-ultimate/id391408247/reviews.md

### 4/5 — Decent App

*2024-06-07, version 6.8*

This app works well (especially given the cost)  It has a few bugs when used with modern devices (notably the scrollboxes get clipped).

### 1/5 — Not worth it

*2019-04-17, version 2.10*

I bought the app to do load calcs on my iPhone . There is something seriously wrong with that portion of the app however all the other parts work fine , only problem is I need a program to do quick load calcs not to find my superheat and subcool

### 2/5 — Great app works great

*2016-04-03, version 2.10*

doesnt work. cant do any load calcs. input data and it disappears

### 1/5 — POS

*2015-08-10, version 2.5*

Not easy to use, very confusing, lacks basic explanations of input fields, can't remove information once it's entered, app automatically adjusts dimensions no matter how many times you put it back. "Support" is a joke. No way to get additional information on any of the fields. Total rip off.

### 1/5 — Update killed this app!

*2015-03-10, version 2.2*

Carmel better get busy fixing this. I paid way too much for an app that won't open!!!

### 1/5 — Nothing

*2015-03-03, version 2.2*

App will not load since last update. I used it all the time before.

### 5/5 — Very useful app

*2015-02-23, version 2.2*

This app installed fine for me, and it’s great. Has everything I need for my HVAC work in the field including load calcs, duct sizing, and keeping track of my maintenance. Worth the price!

### 1/5 — Update ruined the app

*2015-02-20, version 2.2*

Just updated to the newest version and now the app won't even load!?!?  I worked up 3 load calculations yesterday and it worked great, after update NOTHING!

### 1/5 — Insanely overpriced!!!

*2013-01-27, version 1.4*

For the price we're paying, this app should have more features and must be more user-friendly. The app is even ugly. Everything this app does can be found for free elsewhere. Highly disappointing and the developers keep on adding the same apps over and over again instead of updating the existing ones just to cash in on more money. Apple should block such developers from entering the Apple Store. Bottom line... Don't buy this crap.

### 3/5 — Ultimate, isn't.

*2012-09-08, version 1.4*

Missing the one item I wanted; room by room heat load calcs. It has a room by room that has ceiling as the only opaque feature active. $24 more to get the residential load calc "plus". Bummed at the cost of the first, and further by the second.

## Frequently asked questions about HVAC Toolkit Ultimate

### What is HVAC Toolkit Ultimate?

HVAC Toolkit Ultimate is a paid productivity app that provides a comprehensive suite of tools for HVAC professionals. It includes modules for load calculations, equipment tracking, refrigerant properties, duct and pipe sizing, and psychrometric analysis.

### What devices does HVAC Toolkit Ultimate support?

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

### How much does HVAC Toolkit Ultimate cost?

HVAC Toolkit Ultimate is a paid application priced at $59.99. This one-time purchase provides access to all its included functionalities.

### Does HVAC Toolkit Ultimate have ads?

No, HVAC Toolkit Ultimate does not contain advertisements. As a paid application, it offers an ad-free experience for its users.

### How often is HVAC Toolkit Ultimate updated?

The latest version of HVAC Toolkit Ultimate is 7.9, and it was last updated on April 21, 2025. This indicates a commitment to regular updates and improvements.

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

HVAC Toolkit Ultimate has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals who may be learning about HVAC concepts.

### Can I email results from HVAC Toolkit Ultimate?

Yes, the 'HVAC Residential Load Calcs' module allows you to perform calculations in the field and then email the results back to your office. This feature enhances workflow efficiency.

### What makes HVAC Toolkit Ultimate a good value?

The app is presented as a cost-effective solution, as purchasing all its individual components separately would cost more than twice the price of this bundled application.

## Version history (last 5 releases)

### 7.9 — 2025-04-21

1. Optimized for iOS 18.
2. Updated help.
3. Per Apple guidelines, the built-in Locator app only stores information locally.

### 6.8 — 2021-12-17

1. Optimized for iOS 15 and iPhone 13
2. Updated user interface elements for individual modules
3. Updated ASHRAE 62.1 module (includes 2016/2019 versions)
4. Updated help

### 6.0 — 2020-08-19

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

### 5.0 — 2019-12-06

1. Added 5 new refrigerants to the PT Chart and RefCharge modules including R-450A, R-455A, R-452A, R-452B, R-1233ZD, R-245FA (and all dew/bubble versions)
2. Optimized the user interface for iOS 13 and iPhone X and 11 screens
3. Fixed the "negative sign" issue that occurs in iOS 13
4. Fixed issue with not displaying properly in iOS 13 "dark mode"
5. Fixed issue with report Close, Print, Upload buttons not dispaying in iOS 13 for the HVAC Res Load Calcs HD module
6. Fixed issues with text being cutoff on selector controls on the pipe sizer modules
7. Updated help

### 3.0 — 2019-07-19

1. Updated help
2. Optimized for iOS 13
3. Optimized for iPhone X and iPad Pro (12.9 in) screens

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## 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 2026-08-27.*