# HVAC ASHRAE 62.1 — Perform 62.1 ventilation calcs

> Perform ASHRAE 62.1 ventilation calculations for commercial buildings. (iPhone/iPad app by ASHRAE, Inc..)

- Source: https://appshunter.io/ios/app/hvac-ashrae-621/id375374905 (this page in markdown: same URL + `.md`)
- Developer: [ASHRAE, Inc.](https://appshunter.io/developer/375374912)
- Category: Productivity, Business
- Price: $19.99
- Rating: 3.00/5 from 2 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 2 MB
- Languages: American English
- Released: 2010-06-21
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hvac-ashrae-621/id375374905/reviews.md

## What is HVAC ASHRAE 62.1?

ANSI/ASHRAE Standard 62.1-2019, Ventilation for Acceptable Indoor Air Quality, sets minimum ventilation rates and other requirements for commercial and institutional buildings. Standard 62.1 has served the building industry and the public as the most prominent standard on ventilation for indoor air quality.

The "HVAC ASHRAE 62.1" iPhone application allows you to perform comprehensive minimum ventilation rate calculations for a wide variety of commercial buildings based upon both the Standard 62.1-2016 and 2019 versions. You can select which version to use by project so as to accommodate LEED requirements and more.

This app is loosely based upon the "62MZCalc.xls" Excel spreadsheet that accompanies each copy of the 62.1 User’s Manual (either the 2016 or 2019 version). You can do pretty much everything in this app that you can do in the Excel spreadsheet, in addition to the following: 

1. Store an unlimited number of projects, systems, and zones that can be accessed and modified at any time.

2. Quickly perform ventilation calcs in the field, then email the results for further analysis on your office computer.

3. By using slider-controls for the inputs, you can instantly see the results update as you increase or decrease the input values.

4. Access all 70+ ASHRAE 62.1 space types with "per person" and "per unit area" ventilation rates.

5. Create default project templates (with your company default values, for example) that can be used to create new projects. 

6. Easily toggle between English (IP) and Metric (SI) units

7. Select to calculate according to the 2016 or 2019 version of the Standard.

8. and more .....

The HVAC ASHRAE 62.1 app comes with full online help. In addition, full support and video tutorials (coming soon) are available at the support link located in iTunes.

We will periodically update this app based upon user feedback and will also release new versions along with new versions to the 62.1 Standard, itself.

## Key features

- Perform 62.1 ventilation calculations
- Supports 2016 and 2019 standards
- Unlimited project, system, and zone storage
- Quick field calculations
- Slider-controls for instant result updates
- Access 70+ ASHRAE space types
- Toggle between IP and SI units

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/hvac-ashrae-621/id375374905/reviews.md

### 5/5 — Great update

*2021-10-03*

Love the update to 2019. About time.

### 5/5 — Engineer

*2010-09-10*

As a 62.1 user, I have found this application to be well worth the money. I like the way it works and looks. The ability to e-mail the results to my office is very convenient. Great work; keep it up!

### 5/5 — Simple to use

*2010-08-05*

I like how simple this app is to use. Nice clean interface, and it allows me to store all my projects without losing data. The best part is the email functionality so I can email the results back to my office laptop. It's been useful for LEED calcs, too.

### 5/5 — Very useful

*2010-07-12*

This is an incredibly useful app for quickly calculating minimum ventilation rates for all types of spaces and buildings. I like how it mimics the spreadsheet that comes with the 62.1 standard, yet it is also much improved in the sense that I can easily use it out in the field. Also, it allows me to store multiple projects, systems, and zones all within the app and come back later to update and view the information. Great work!

### 5/5 — Good to use out in the field and also for LEED

*2010-07-09*

I've been using this app for a couple weeks now, and I really find it useful in the field to do quick vent. calcs. The best part though is emailing back to the office so I can use it for my LEED calculations. Nice little app.

### 2/5 — Doesn't seen to work well with iOS 4

*2010-07-09*

For some reason, the App does not work well on my Ipod Touch.  I think it might be related to other problems I have experienced since I've downloaded the iOS 4 update on my iPod.  When I get to select the Zone List, the App immediately closes down.

### 5/5 — Good to see 62.1 for the iPhone

*2010-06-22*

I'm a moderate user of the spreadsheet that accompanies the 62.1 Standard, and this app is a great complementary tool for doing quick ventilation rate calcs out in the field. I really like the fact that I can email the inputs and results as a spreadsheet so I can work with it on my office laptop later on.

Awesome app, ASHRAE!

## Frequently asked questions about HVAC ASHRAE 62.1

### What is HVAC ASHRAE 62.1 used for?

HVAC ASHRAE 62.1 is used to perform comprehensive minimum ventilation rate calculations for commercial buildings, adhering to ANSI/ASHRAE Standard 62.1.

### Which versions of ASHRAE 62.1 does HVAC ASHRAE 62.1 support?

The app supports both the 2016 and 2019 versions of the ANSI/ASHRAE Standard 62.1, allowing users to select the appropriate version for their projects.

### Can I store my projects in HVAC ASHRAE 62.1?

Yes, you can store an unlimited number of projects, systems, and zones within the app, which can be accessed and modified at any time.

### Does HVAC ASHRAE 62.1 have ads?

No, HVAC ASHRAE 62.1 does not contain advertisements.

### What is the price of HVAC ASHRAE 62.1?

HVAC ASHRAE 62.1 is a paid application priced at $19.99.

### On which devices can I use HVAC ASHRAE 62.1?

HVAC ASHRAE 62.1 is available for iPhone and iPod devices.

### How often is HVAC ASHRAE 62.1 updated?

The app is periodically updated based on user feedback and will see new versions released alongside updates to the 62.1 Standard itself. The latest version is 3.8, last updated on October 1, 2021.

### Does HVAC ASHRAE 62.1 offer support or tutorials?

Yes, the app comes with full online help. Additional support and video tutorials are available via a link in iTunes.

## Version history (last 5 releases)

### 3.8 — 2021-10-01

1. Updated tables and calculations for the 2016 and 2019 versions of ASHRAE 62.1
2. Added all new space types for the 2016 and 2019 versions
3. Updated the air distribution list for the 2016 and 2019 versions
4. Allow for greater than 100% for people and supply fan airflow diversities
5. Optimized for all iPhone screen sizes including the new iPhone 12 Pro Max/iPhone 13 and iOS 15
6. Updated UI
7. Updated help

### 2.0 — 2015-03-17

This app has been updated by Apple to display the Apple Watch app icon.

1. Updated for ASHRAE 62.1-2013
2. Updated user interface
3. Optimized for iOS 8
4. Updated in-app icons (higher-res)
5. Updated help

### 1.8 — 2012-03-05

1. Updated logo and copyright.

### 1.7 — 2011-05-20

1. Allows for either ASHRAE 62.1-2007 or 62.1-2010 calcs (the user can select which method to use by project)

2. Includes 2 more inputs to accommodate the 62.1-2010 calcs

3. Includes updated values for existing space types and values for 5+ new space types

4. Updates the HTML report to include the additional inputs and results for the 2010 version

5. Includes a new launch icon with the text: ASHRAE 62.1-2010

6. Includes updated help

7. Includes additional icons inside the app itself

8. Fixes email-freezing issue that occurs when there are more than 100 or so zones per system

### 1.2 — 2010-08-12

1. Updated the user interface (UI) in the following ways:

a. Added icons to the project, system, and zone lists so as to better indicate to the user what list they are viewing.

b. Added more information to be displayed below the project, system, and zone lists, respectively. For example, below the project list, the client name and location is displayed. Below the system name, the system ventilation efficiency and outside air quantity are displayed. Below the zone name, the zone ventilation efficiency and inputted zone airflow are displayed. Also, the "critical" zone name is displayed in maroon.

c. The quantities of systems and zones are displayed on the forms prior to accessing those lists, respectively.

2. Depending upon which zone unit type is selected (ITU, DFDD, TF, and NONE), certain unused inputs will be hidden so as to simplify the zone input process.

3. The app was tested on OS4.

4. The help was updated to explain the above revisions.

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All apps by ASHRAE, Inc.: https://appshunter.io/developer/375374912

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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 2026-08-24.*