Commercial Gas Calculator

Commercial Gas Calculator

by Oliver Shingler

23 ratings
17 reviews
$1.99
In-App Purchases

Details

  • Released
  • Updated
  • June 6, 2015
  • December 16, 2025

Features

Commercial Gas Calculator screenshot #1 for iPhone
Commercial Gas Calculator screenshot #2 for iPhone
Commercial Gas Calculator screenshot #3 for iPhone
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About

This app helps gas engineers calculate the maximum purge time for non-domestic natural gas installations. It adheres to IGE/UP/1A standards for installations up to 1m³ and 40mbar. Additional features like tightness testing duration and saving installations are available via in-app purchases.

Calculate maximum purge time
Supports non-domestic natural gas
Adheres to IGE/UP/1A standards
In-app purchase for tightness testing
Optional save installations add-on
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What's New in Commercial Gas Calculator

1.3.3

December 16, 2025

Updated for new age rating compliance only

2

In-App Purchases

$0.99

Tightness Testing Duration

Calculates the required duration of the Tightness Test (TTD) for a specified commercial gas installation.

User reviews

Absolute rubbish

Doesn’t do anything lets you put measurements in then wont add to system tried on iPhone and ipad same results zero

Could be better

Would be a lot better and more useful if it was made useable for UP1 as well

Hose size on the purge makes no difference

Very disappointed to see that the purge time remains the same for a 15mm purge point as it does a 50mm
Something very wrong here hey

Seriously lacking

This is fine for domestic and medium-sized commercial installations, but where it falls short is on calculations involving larger internal volumes. I find that once you get up to about 1.8 cubic meters or above, it simply errors and does not give purge and test times at all.

Furthermore the steel pipe sizes (a) are given in mm when steel is always measured imperially - in inches and fractions (b) only goes up to 150mm - six inches - when eight inch, twelve and above are common.

Disappointing app that really could be indispensable with these small changes.
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Could be so much better

Yes the calculator gives TTD but the calculations above do no indicate IVmeter so does not give IV to total
I expected the calculator to allow for maximum permissible leak rates, but sadly it just works out the purge volume and TTD although given i had to manually work out to see if it was correct
NO TTP nor let by period
Unfortunately the app is sadly lacking however it does work out the pipe volume correctly !
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Developer apps

FAQ

What is the Commercial Gas Calculator used for?

The Commercial Gas Calculator is used by gas engineers to determine the maximum time required to purge air from non-domestic natural gas installations, ensuring appliances fire correctly. It follows IGE/UP/1A guidelines for installations up to 1m³ and 40mbar.

Does the Commercial Gas Calculator support all types of gas installations?

No, the Commercial Gas Calculator is suitable for natural gas (NG) installations only. It is designed for installations with a volume not exceeding 1m³ and a maximum operating pressure (MOP) not exceeding 40mbar.

Can I calculate tightness testing duration with the Commercial Gas Calculator?

Yes, the option to calculate the tightness testing duration (TTD) for the system is available to purchase as an in-app feature. This allows for a more comprehensive calculation.

How can I save my installation calculations?

For busy professionals, a 'Save Installations' add-on is available for purchase within the app. This feature allows you to save and retrieve installation layouts for future reference, streamlining your workflow.

What is the price of the Commercial Gas Calculator?

The base Commercial Gas Calculator is priced at $1.99. Additional features like tightness testing duration and saving installations are available as separate in-app purchases.

On which devices can I use the Commercial Gas Calculator?

The Commercial Gas Calculator is available for iPhone, iPad, and iPod. It is designed to run on Apple's iOS operating system.

How often is the Commercial Gas Calculator updated?

The Commercial Gas Calculator was last updated on December 16, 2025, with version 1.3.3. Updates typically address bug fixes and feature enhancements to improve user experience and accuracy.

Does the Commercial Gas Calculator have ads?

No, the Commercial Gas Calculator does not contain advertisements. The app is free to download with optional in-app purchases for advanced features.