I installed an InterGas Boiler
this week with Frank from JS Plumbing. The main feature the customer liked was its size. Due to the expansion tank not being inside the boiler compartment it is one of the thinest boilers, although you can by a fitting kit which means the expansion tank could be fitted in a rear jig. Its other main feature is its simplicity. The boiler has only 5 moving parts. It has no diverter valve, no valve motor, no auto air vent, no hot water plate heat exchanger & no air pressure switch. There is no need to by a heating controller because it has one fitted as standard. My only concern with this boiler is the time it takes to heat the hot water when the boiler has been off for a while. When we commissioned the boiler and turned the hot water on for the 1st time it did take a while to reach temperature.
If the central heating is on then i'm pretty certain the water would reach temperature a lot quicker due to its design.
Here is a video giving you some info on the InterGas Boiler