Spent ALL day balancing radiators...

[brooky_agb]

I've spent literally all day balancing radiators in my old solid brick house. I think I have just about got it sorted now.

We have 21 radiators on two levels. The average temperature seems to be 50 degrees centigrade with the boiler on max with max input temp of 65 degrees.

Does this seem a little low? We have a nearly new A rated external worcester bosh oil combi boiler.

Should I be expecting higher temperatures from it? Do you think they it may be because the pipework has no insulation?

I've been in this house three years now and have spent days and days messing with the heating. Really keen to have a warm winter for once.

Any experienced feedback? Is this normal?

 

[D_Hailsham]

Normally combi boilers will be more than adequate for central heating as they require a high output to supply instant hot water. However you have 21 rads, which suggests a large house, so the combi may not be supplying enough heat to the rads.

Use Whole House Boiler Size Calculator to find out what size boiler you should have for central heating. Then use Stelrad Elite Catalogue to estimate the output of all your rads. You should use the page headed 40 Δt.

Post your findings as well as the model no and output of your boiler.

 

[brooky_agb]

Thank you!

 

[brooky_agb]

Hmm boiler seems to be ok. It's a 4 bed detached house... 20 x 10 meters with this boiler..

http://www.worcester-bosch.co.uk/homeowner/boilers/oil-boilers/greenstar-heatslave-external-2532

 

[D_Hailsham]

Hmm boiler seems to be ok. It's a 4 bed detached house... 20 x 10 meters with this boiler.

Is that the footprint? If so, it's a very large house!

What size boiler did the calculator give and what about the total radiator output.

 

[brooky_agb]

It is quite big. https://maps.gstatic.com/m/streetview/?panoid=bmmDM51FRh97VUlN4EKUGQ&cbp=0,99.07875786595795,,0,0

From that website boiler should be spot on. Managed to get average radiator to 54 degrees using an infra red thermometer at the top middle of each radiator.

They are all very hot to touch now. Saying this heat in has been on all day and temp is 19 degrees. Lol

FFS his house drives me nuts

 

[CBF]

TBH with that size house & that number of rads i'm guessing you have 2 or more bathrooms & if that's the case i wouldn't have dreamed of fitting a combi in the first place

 

[brooky_agb]

Oh right. why not? it has two bathrooms and a downstairs toilet.

 

[D_Hailsham]

It is quite big.

Nice location

From that website boiler should be spot on. Managed to get average radiator to 54 degrees using an infra red thermometer at the top middle of each radiator.

If the boiler and rads are correctly sized, you should be getting 60C at the rads with a flow temp of 70C.

What is the flow temperature of your boiler?

 

[brooky_agb]

Thanks.

I'm averaging 55 degrees at the top middle part of the rad so I suppose thats ok. I'm not sure of the temp from the boiler. I'll need to get in the roof to check it but I expect its about 70 degrees.

 

[D_Hailsham]

The problem is that your boiler is correctly sized, but the house is not getting warm enough. This can only mean that your rads are not large enough.

That's why I suggested you checked their outputs using the link I gave. If you don't have 30kW of rads, correctly allocated to the rooms, the house will never get up to temperature.