How to test the flue air intake on a gas central heating boiler. Boiler Service.
Elliott from E Fry Gas Services shows us a leaking Vaillant Combi Boiler.
How to test if the flue is dangerous.
LEEDS PLUMBER – Shocking Boiler Installation and New Boiler https://www.youtube.com/watch?v=kIFbqtykuQk&t=11s
ACS GAS TRAINING