# NATE Toolkit+ — Endless HVAC functionality

> All-in-one HVAC calculation and data toolkit for industry professionals. (iPhone/iPad app by Carmel Software Corporation.)

- Source: https://appshunter.io/ios/app/nate-toolkit-plus/id1017863608 (this page in markdown: same URL + `.md`)
- Developer: [Carmel Software Corporation](https://appshunter.io/developer/317970398)
- Category: Business, Productivity
- Price: $44.99
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 62 MB
- Languages: American English
- Released: 2015-07-24
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/nate-toolkit-plus/id1017863608/reviews.md

## What is NATE Toolkit+?

The NATE Toolkit+ app was developed by Carmel Software for North American Technical Excellence, Inc. (NATE). This app 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 an in-app purchase on the free stand-alone version of Locator).

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 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 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 Locator
- Refrigerant Charge Calculations
- Duct Sizing Analysis
- Psychrometric Calculations
- Steam Tables
- Ventilation Calculations

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/nate-toolkit-plus/id1017863608/reviews.md

### 1/5 — Garbage

*2018-11-22, version 1.0*

App locks up on my iPhone and when it does work the platform is not intuitive 
Tried to get a refund and it states no refunds allowed 
So they sell a defective app and I can’t get my $45.00 back
Buyers beware!

## Frequently asked questions about NATE Toolkit+

### What is NATE Toolkit+?

NATE Toolkit+ is a paid application developed by Carmel Software for HVAC professionals. It bundles numerous specialized HVAC calculation and data tools into a single application, offering a cost-effective solution compared to purchasing individual apps.

### How much does NATE Toolkit+ cost?

NATE Toolkit+ is priced at $44.99. This one-time purchase provides access to all the included HVAC functionalities.

### What devices support NATE Toolkit+?

NATE Toolkit+ is available for iPhone, iPad, and iPod devices, making it accessible for a wide range of Apple users in the HVAC industry.

### When was NATE Toolkit+ last updated?

The latest version of NATE Toolkit+ is 5.52, and it was last updated on August 14, 2020. This indicates a history of development and maintenance for the application.

### What HVAC calculations can NATE Toolkit+ perform?

NATE Toolkit+ can perform residential load calculations, duct sizing, refrigerant charge calculations, psychrometric calculations, ventilation calculations, and more, covering a broad spectrum of HVAC needs.

### Does NATE Toolkit+ have ads?

Based on the provided data, there is no information indicating that NATE Toolkit+ contains advertisements. As a paid application, it is typically expected to be ad-free.

### What is the user rating for NATE Toolkit+?

NATE Toolkit+ has a rating of 1.0 stars based on 1 review. This suggests a very limited user feedback base at this time.

### What is the age rating for NATE Toolkit+?

NATE Toolkit+ has an age rating of 4+, meaning it is suitable for users aged 4 and older. This indicates that the content is generally appropriate for a wide audience.

## Version history (last 3 releases)

### 5.52 — 2020-08-14

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

### 5.0 — 2019-12-09

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

### 1.0 — 2015-07-23

No release notes.

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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

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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 2026-06-10.*