This is an Ohm's Law Calculator with a built-in mini-guide to refer to if required.
The calculator is very easy to use, enter two known values, select the units, press 'Calculate' and the other two values will be displayed instantly!
The guide contains 7 parts:
• Ohm's law
• Watt's law
• Adding resistances
• Voltage formulae…
This is a the Lite version of Mr Combi's Gas Rate Calculator & Guide. It supports natural gas with a metric meter only.
Input the initial meter reading, use the built-in 2 minute timer and then input the final reading. Press the calculate button and the results will then be displayed on the screen.
Gas rates are given in cubic metres per…
Use the Gas Ratio Calculator to process the results from your Gas Flue Analyser and find the CO/CO2 ratio for natural gas.
If the boiler is running efficiently there may be no need to service it. Simply test the boiler with your analyser and obtain the oxygen, carbon monoxide and carbon dioxide values. Input the values from the analyser into the G…
Mr Combi's Gas Rate Calculator will help you find gas rates (cubic metres per hour, cubic feet per hour and litres per second) and gross and net heat inputs in MJ/h, kW and BTUs per hour.
The app has the following features:
Built-in let-by/tightness testing timers
Built-in conversion calculator
Built-in guide with full gas rate calcu…
A study carried out by Worcester Bosch Group's technical support team found that the most common cause of a boiler installation problem was from incorrectly sized gas pipes. When fitting a new boiler, often the existing pipes should be replace for larger ones due to the increased output. Smaller pipes will mean the boiler is running at a lower…
The Heatloss Calculator & Guide from Mr Combi Training includes three useful calculators:
• Heatloss calculator - finds the heatloss from a room
• Radiator calculator - estimates a radiator's length/output
• Converter - quickly converts between Watts and BTU/h
This easy to use calculator lets you enter the details for…
Following Mr Combi's hugely successful one day fault finding course and DVDs, this application will help you use your multimeter effectively. It will show you how to ensure a boiler is safely installed, safe to work on and conforms to BS7671. It can also help you to identify the cause of faults!
The app has four parts: the Electrical Safety Te…
The Expansion Vessel Calculator will help you to conform with BS 5449:1990, Section 3 by ensuring the expansion vessel on a central heating system is sized correctly.
Combi boilers are normally fitted with a vessel of between 6 and 8 litres. This internal vessel may not be sufficient on larger heating systems. You can use this app to calculate the…