Cast Iron Rads - Plumbing Forum | Plumbers Forums

Conrad · 13-12-2007

Hi all,

Just joined the site and am looking for some advice.

I've just bought a new house that needs completely gutting, built circa 1890, and want to fit cast iron rads. I've just agreed in principle to buy 10 from an architectural reclamation yard. Can anyone tell me how heat-efficient they are? I'm also fitting a new Worcester Greenstar 42 CDI condensing combi-boiler.

**uug197h** · 13-12-2007

hi conrad welcome to the forum

try this site for Radiator Enquiry / Heating Calculator

Cast Iron Radiator Enquiry, Heating Calculator

You may need more rads than you think.
and you will need new valves with old fixings this site may help with that as well

Conrad · 19-12-2007

Hi again, thanks for the info, much appreciated. The rads I have bought are from an Architectural Reclamation yard, and he had more than 30 of the type I'm buying, so no real issue if I need morem althought it seems like the 10 will be okay.

I am a bit concerned though by what a heating engineer friend of a friend said earlier this week. He is suggesting that because of the size & No. of the ols rads I will need a seperate expansion vessel, in addition to the Worcester Combi? Does this sound right? The house will also have 1 GF & 1FF bathroom.

**uug197h** · 20-12-2007

i am not a heating engineer so i'm not sure about the expansion tank but i have changed radiators in some large houses with 18 radiators and they only had a large floor standing combi,

Conrad · 20-12-2007

Cheers. It's difficult to know what to do with conflicting advice, and I'm out of the country for a while so I can't just pin down an engineer and get things sorted. I'll keep canvassing opinion or wait and see if anyone else has any comments/suggestions

Ben1275 · 31-01-2008

i fitted cast iron radiators to my house recently, had trouble finding traditionl thermostatic valves to suit i end up fitting these

radiator valves. hope this is useful....

**ProffesorPlumb** · 31-01-2008

Quote:

Originally Posted by Conrad

Hi again, thanks for the info, much appreciated. The rads I have bought are from an Architectural Reclamation yard, and he had more than 30 of the type I'm buying, so no real issue if I need morem althought it seems like the 10 will be okay.

I am a bit concerned though by what a heating engineer friend of a friend said earlier this week. He is suggesting that because of the size & No. of the ols rads I will need a seperate expansion vessel, in addition to the Worcester Combi? Does this sound right? The house will also have 1 GF & 1FF bathroom.

Yes this sounds correct Re: Expansion Vessel. Its to do with the amount of pipe work runs you will have, to reduce the amount of potential noise rattling through your pipes.

Quote:

Originally Posted by Conrad

Hi all,

Just joined the site and am looking for some advice.

I've just bought a new house that needs completely gutting, built circa 1890, and want to fit cast iron rads. I've just agreed in principle to buy 10 from an architectural reclamation yard. Can anyone tell me how heat-efficient they are? I'm also fitting a new Worcester Greenstar 42 CDI condensing combi-boiler.

With the boiler, you will need to check that it is SEDBUK A rating, as this will conform to building regs.

With the rads, cast iron is very radiant with heat and will also need a lot of water to fill them up. So energy efficiency is not the best with these

wiggikins · 09-03-2008

1) To comply with reg's boiler can be SEDBUK Aor B Band.

2)An extra expansion vessel may be required to accommodate expansion of increased volume of heating system water as a result of older cast rads having larger capacities per foot than modern low content rads. Also may require larger F/R pipework to carry
output requirement. EV WILL NOT aid noise supression on pipework, adequate clipping and insulation WILL.