Radiator replacement size.

[Unklian]

Hi Folks.

I'm sorry, I cant find a table of outputs old enough.

My current (old) bathroom radiator is a single panel with NO fins. 600mm high, 900mm long. keeps the bathroom lovely & warm all seasons.

We're having a bathroom re-fit and due to its very small size, I was thinking if a smaller radiator.
Does anybody know the BTU of the old radiator so that I can calculate the size of a new, shorter length (same height 600mm) K1 finned single radiator?

For your info, The bathroom is 1700mm x 1850mm x 2400mm high. Not north facing with one double glazed window 1000mm x 1200mm

Thanks.

Ian.

 

[kevplumb]

replace like for like or similar and put a trv on it

as long as it ain't the bypass

 

[Unklian]

Hi there.

It has a TRV on it. currently set at 3 / 5 so the current radiator is big enough to do the job.
Its just inconveniently long and VERY close to the edge of the door when opening. I was just after the size that would still do a good job but more compact.

e.g. 600mm x 700mm K1 finned or
600mm x 600mm K1 finned.
Cheers.

Ian.

 

[Steve69the69Gas]

Put a smaller double finned rad in and turn trv down to suit

 

[kevplumb]

thats the way to go bonny lad

 

[mogget]

You can use the Stelrad elite catalogue to estimate the heat output of your existing radiator.

http://www.stelrad.com/uk/docs/elite.pdf

 

[Agile]

Its all pretty irrelevant as heat outputs/requirements are only approximations.

You can assume that your old rads have 80% of the output of a similar size modern finned radiator.

That means that you could reduce the length by about 80% so a 700 wide would be about the same heat output as your 900 wide.

However, its always better to have a little extra in hand and thats particularly important if you have a condensing boiler with optimum lower flow temperatures.

Its worse if you cover the rad with towels as that stops most of the heat output.

If all you want to do is give more clearance by the door then surely an 800 wide is the answer?

Tony

 

[kirkgas]

a 600mm high x 500mm K2 is ideal for this size of bathroom