Boiler suggestion to replace potterton suprima 70

[Steve Bee]

Hello.

I am looking to replace a potterton boiler suprima 70 installed in 1999. Coming up to 25 years is working fine but I may consider a replacement. I have a gledhill torrent eco OV 210 for a 3 ensuite shower house with 17 radiators.

It was suggested a Worcester bosch greenstar 24W RI would suffice. I did plug in some details in to the Worcester bosch webpage and it suggested the 30W boiler.

If anyone has a similar set up any help with recommendations would be appreciated. Thanks

 

[Jurassicspark]

If you really want a new boiler get a heat loss survey done and take it from there.

"3 en suite" suggests that you will need a system boiler because just a combi boiler will give disappointing results.

 

[CountryFan]

17 radiators at 1.5 kw each (rough guide) = 25kw, so I don’t think the 24kw would cover it, but happy to be proven wrong with the calculations.

 

[muggles]

17 radiators at 1.5 kw each (rough guide) = 25kw, so I don’t think the 24kw would cover it, but happy to be proven wrong with the calculations.

I tend to use 1kW per radiator as a rough rule of thumb, so 17kW in this case, but obviously neither of these are substitutes for a proper HL calculation

 

[Steve Bee]

Thanks all. I was not planning to replace the torrent eco OV 210. It was a replacement for a boilermate 3 by BG in 2016... so relatively new. I assumed that the boiler i need is a heat only boiler and not a system one from what i have read. Just got a BG sales to begin a quote and he said they will put in the greenstar Ri 24W. I did always wonder if the 210 cylinder which replaced the 240 boilermate was too small for the 17 radiators.

 

[Mister Banks]

Thanks all. I was not planning to replace the torrent eco OV 210. It was a replacement for a boilermate 3 by BG in 2016... so relatively new. I assumed that the boiler i need is a heat only boiler and not a system one from what i have read. Just got a BG sales to begin a quote and he said they will put in the greenstar Ri 24W. I did always wonder if the 210 cylinder which replaced the 240 boilermate was too small for the 17 radiators.

Any quote needs to be based on the heat loss survey, I'm surprised BG can state the boiler size without having the heat loss figure.

 

[muggles]

Thanks all. I was not planning to replace the torrent eco OV 210. It was a replacement for a boilermate 3 by BG in 2016... so relatively new. I assumed that the boiler i need is a heat only boiler and not a system one from what i have read. Just got a BG sales to begin a quote and he said they will put in the greenstar Ri 24W. I did always wonder if the 210 cylinder which replaced the 240 boilermate was too small for the 17 radiators.

That's a shame, because the Torrent will do horrible things to the potential efficiency of your shiny new boiler

 

[Steve Bee]

Further to the above BG said they did do a heat loss survey and arrived at that boiler output. It is a bit of a difference when I plug my info in to the Worcester bosch Web site or even BOXT which come up with a different series of bosch boiler. One issue maybe the fact that the existing boiler is within a kitchen cupboard and the existing potterton is on the smaller size.