Hello,
I need a new boiler. I did manage to fix the divertor valve on my old Worcester, but now something else has gone wrong. Given that it's undersized, and has a leak, I figure it's finally time to put it to rest.
So, my friendly installer recommends either the Vaillant 831 or 837.
Cold water flow will be no problem. I recently had the mains lead replaced, and we have 32mm (IIRC) coming into the property, and 22mm to the boiler. If I turn the kitchen cold tap on full, I get soaked!
To give an idea of my house, I have 15 rads, of which 4 are smallish towel rails, but the rest are normall-ish sized radiators (I can measure if really relevant).
My minimum requirement is to be able to have a shower without it cutting out when the hot tap is run (as it does at the moment). Running two showers would be heaven, but I accept it's pretty unlikely.
To put an idea on my expectations regarding the shower, measured with a weir cup we get about 8l/m out of the current boiler, so I suppose running a tap and leaving enough HW to maintain 7 or 8l/m would probably be fine. (right now, turning on the kitchen tap virtually stops the shower running)
Finally, I don't want to spend more than I need to, or worse, have an inefficient heating system due to the boiler cutting in and out the whole time, so please help me, would an 831 or an 837 be a better option?
Thanks,
Leon
I need a new boiler. I did manage to fix the divertor valve on my old Worcester, but now something else has gone wrong. Given that it's undersized, and has a leak, I figure it's finally time to put it to rest.
So, my friendly installer recommends either the Vaillant 831 or 837.
Cold water flow will be no problem. I recently had the mains lead replaced, and we have 32mm (IIRC) coming into the property, and 22mm to the boiler. If I turn the kitchen cold tap on full, I get soaked!
To give an idea of my house, I have 15 rads, of which 4 are smallish towel rails, but the rest are normall-ish sized radiators (I can measure if really relevant).
My minimum requirement is to be able to have a shower without it cutting out when the hot tap is run (as it does at the moment). Running two showers would be heaven, but I accept it's pretty unlikely.
To put an idea on my expectations regarding the shower, measured with a weir cup we get about 8l/m out of the current boiler, so I suppose running a tap and leaving enough HW to maintain 7 or 8l/m would probably be fine. (right now, turning on the kitchen tap virtually stops the shower running)
Finally, I don't want to spend more than I need to, or worse, have an inefficient heating system due to the boiler cutting in and out the whole time, so please help me, would an 831 or an 837 be a better option?
Thanks,
Leon
