D_Hailsham wrote;
Are you an installer, D_Hailsham? I see you give advice on boiler installation pricing.
In my opinion (as a boiler installer) the Gas4You quote is far more typical ballpark.
Regarding the Suprima, it was a design to make a boiler fit in a very small footprint, which in it's day was quite ambitious.
Consequently, lots were installed because they would fit inside wall kitchen units etc.
The problem with the design is that a small temperature increase in the small casing can do a lot of damage, so Potterton had to design a system that would work on very close tolerances to control the temperature within safe limits.
But every installation is different as we all know; flow rates can be variable with TRVs, dodgy pipework, failing pumps, pumping over etc.
So the Suprima has always worked on a bit of a knife edge. If they expand the temperature tolerance, the boiler won't keep locking out but could go postal. If they make the tolerance tighter, system defects will cause nuisance lockouts.
And then there is the PCB itself. As components get older and degrade, the tolerances change. Hopefully the version 4 will be better in service; but this is all a 'polishing a turd' exercise.
Are you an installer, D_Hailsham? I see you give advice on boiler installation pricing.
In my opinion (as a boiler installer) the Gas4You quote is far more typical ballpark.
Regarding the Suprima, it was a design to make a boiler fit in a very small footprint, which in it's day was quite ambitious.
Consequently, lots were installed because they would fit inside wall kitchen units etc.
The problem with the design is that a small temperature increase in the small casing can do a lot of damage, so Potterton had to design a system that would work on very close tolerances to control the temperature within safe limits.
But every installation is different as we all know; flow rates can be variable with TRVs, dodgy pipework, failing pumps, pumping over etc.
So the Suprima has always worked on a bit of a knife edge. If they expand the temperature tolerance, the boiler won't keep locking out but could go postal. If they make the tolerance tighter, system defects will cause nuisance lockouts.
And then there is the PCB itself. As components get older and degrade, the tolerances change. Hopefully the version 4 will be better in service; but this is all a 'polishing a turd' exercise.
