Radiator Replacement

[rwiddowson]

Hi

I am looking to replace 3 double radiators in my house.

They are old style double panel with no fins. The system dates, I would guess, to the 1960's.

I have 2 no. 39.75" x 18" and 1 no. 32" x 18". At least one of the larger ones has corroded.

I am struggling to calculate the replacement sizes required. They all sit in an angled bay so I need the nearest size. However, from what I have read the up-to-date radiators provide much more output.

My question is will this be a problem?

I think the existing ones output around 1042W/m but new ones (Type 22) pump out something like 4650BTU for the same size EACH!!!! This equates to about 1350 Watts per radiator.

 

[FiremanT]

What problems do you anticipate?

 

[rwiddowson]

I like to try and read up on things fully before tackling them.

The output is higher than the original radiators.

Having given some more though to it since writing the post, I am wondering if I can actually get away with installing only the two longer ones?

I estimate a decrease in output of around 200W if I do that. Otherwise the increase would be around 1000W.

I am wondering if I will also stress the pipes as modern radatior width may not closely match th original imperial widths?

Do I also need to install new TRV's and Lockshields?

The house is Edwardian so I would like it to be more efficient in its use of energy without the bed to go to a new boiler.

The boiler is an old Potterton Netaheat MkIIF which appears to be in the list of dangerous boilers in your FAQ section!!!!

I read somewhere that the best reflectors you can get for behind th radiators really help with efficiency on old 9" brick houses. I do 't particularly like the idea of those but your thoughts are welcomed.

 

[Kev F]

More output the better