Mr Combi Training

We recently re-filmed and updated our hugely successful Fault Finding DVD and now you can get the la

The Heatloss Calculator & Guide from Mr Combi Training includes three useful calculators:• Heatloss

This is an Ohm's Law Calculator with a built-in mini-guide to refer to if required.The calculato

Our Wiring & Controls app will help you master two and three-port controls by helping you to underst

With special permission from Danfoss and Honeywell, we took their wiring diagrams and turned them in

This is the feature packed Gas Rate Calculator & Guide, from Mr Combi Training!We've managed to

You can now get the hugely popular Gas Rate Calculator & Guide on your iPhone or iPad. This is the f

Use the Gas Ratio Calculator to process the results from your Gas Flue Analyser and find the CO/CO2

The Gas Ventilation Calculator will help you find the required ventilation sizes for domestic fluele

A study carried out by Worcester Bosch Group's technical support team found that the most common