iPhone app Gas Rate Calculator & Guide

This is the feature packed Gas Rate Calculator & Guide, from Mr Combi Training!

Weve managed to cram all of this into one app.

Metric and imperial gas rate calculators

Save, email or export your results to other apps such as Dropbox, Google Drive or Evernote

Built-in torch

Tightness and let-by timer

Conversion calculator

Full gas rate guide

Supports natural gas, butane and propane

Save manual calorific values for improved accuracy

Select between a 1 and 2 minute timer for metric meters

Selectable timer alert

Supports ft, ft 1ft, 2ft and 5ft imperial test dials

A guide has been built into the app with 6 pages:

Metric gas rate calculations

Imperial gas rate calculations

Heat input calculations

Let-by test procedure

Tightness test procedure

Permissible drops on the tightness test

An extra Converter calculator is included in the app for simple conversions between gas rates and heat inputs.
Simply select the type of gas, enter a value, select the units, press the Calculate button and the calculator will show all gas rates (cubic metres per hour, cubic feet per hour and litres per second) and heat inputs (MJ/h, kW and BTUs per hour) based on the CV.

The Tightness Testing function allows you to quickly select between the let-by and tightness tests and has an easy to use timer.
No longer do you need to fiddle about with your phones timer!

Calorific values can be entered manually (and saved) for more accurate gas rate calculation results.
The calorific value of natural gas in the UK varies from about 38.3 to 40.5 MJ per cubic metre; this can mean a difference in the gas rate calculation of more than 5%! With this calculator you can add the CV for your area in the settings page and avoid these inaccuracies.
The default values set for butane and propane are both the same as supplied by Calor and BOC.

The metric timer can be set to either 1 or 2 minutes.
For U6 and G4 meters one minute is sufficient, for E6 meters two minutes is recommended for accuracy.
The timer can be set to an audible alert, vibrate, both or neither.

A torch function is included with this app if your device has an LED flash.,

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