And you never know, you might get 4 good years out of it, someone else has. I've been told by someone in the trade that Ideal's reputation in council contracts with their 'new' boilers hasn't been marvellous. And the old ones were grim.
We've just built a few flats for rentals and put Worcesters in, 'costly' as they may be; 10 yr warranty. I can see the value of that, even though I could fix them myself at zero labour cost.
If you are in the lettings game and want to put cheap stuff in, cheaply installed, no powerflush etc there's only one likely outcome. In two words, false economy.