This is the Intergas Boiler

With only 4 moving parts Intergas boilers are innovative and built to last. They are the most efficient boilers and non of their heat exchanges have ever had a mechanical failure. Intergas is a Dutch company with over 50yrs in the industry that have saturated the market in the Netherlands. Mainly because any of their boilers can be fitted to any type of heating system. Whether it’s a combi system, a system with an unvented hot water cylinder or an old gravity system any Intergas boiler can fit into it, and what’s even better is the boiler can change into a combi boiler or a system boiler or even just a water heater if need be. The intergas boiler really is revolutionary.  

Have a look at this YouTube video.