RE: Just seen this one3 May 2017 17:32
Have you seen the size for a start nearly twice the size of a normal domestic boiler and weight. How much gas does the household have to use before it becomes economical. There's more to it than just saying it has a short payback period. Payback of what the difference between a normal boiler and insp boiler. Can you buy 2 boilers for the price of 1 insp boiler.