Single radiator in a large room question

View the thread, titled "Single radiator in a large room question" which is posted in UK Plumbers Forums on UK Plumbers Forums.

E

elmocambo

Is it practical or possible to heat a 5M X 5M 2.4M height room with one 10,000BTU radiator ?
The room is properly insulated with douple glazing.
I know multiple radiators are normal in this situation, but my circumstances will only allow the possibility of only one
I am led to believe.
 
Sounds possible.
Need to know wood floors or solid?
Type of room?
Outside walls?
Build/wall type e.g. 11" cavity walls or fully insulated etc. To give Btu requirement but if you've done that correctly to get to the 10,000 Btu, fine.

Have you checked the Delta T of the rad @ 10,000Btu'? It normally says on literature for the rads.

There is no problem using one rad that is sized correctly. You don't need to have multiple rads.
 
Have a look at a k3 rad will need 15mm pipework if you have 10mm it’s a no go
 
The room, a former garage will comply with current uk building regulations U value guidelines when converted.
The k3 rads look like what I need, but I couldn't find the Delta T information on the Stelrad website.
 
elmocambo said:
The room, a former garage will comply with current uk building regulations U value guidelines when converted.
The k3 rads look like what I need, but I couldn't find the Delta T information on the Stelrad website.
Click to expand...

What’s your flow temperature?
 
So 60 probably

So conversion factor 0.492

So 1000w at dt29 will require 2033w at rad spec of dt50
 
elmocambo said:
The flow temperature appears to be 52°C according to my DMM sensor
Click to expand...
Look at this chart.
It tells you flow and return temps at the top and delta T (DT).

DT in this case is temperature difference between radiator surface temperature and room temperature.
You can see the rad outputs and sizes on the page you choose.

Pipe size matters as ShaunCorbs mentioned.

Hope this helps.

What is a DMM sensor?
 
Last Plumber said:
Look at this chart.
It tells you flow and return temps at the top and delta T (DT).

DT in this case is temperature difference between radiator surface temperature and room temperature.
You can see the rad outputs and sizes on the page you choose.

Pipe size matters as ShaunCorbs mentioned.

Hope this helps.

What is a DMM sensor?
Click to expand...

I thought it might be digital multi meter
 
Last Plumber said:
Maybe you're right.
Click to expand...
Some digital multimeter's do indeed have a temperature-measurement setting. You typically need to buy the sensor / probe, e.g. Fluke 80BK-A, as optional extra. This is essentially a type-K thermocouple and a bit of electronics to calibrate it.

Personally, I think they are a bit expensive for what they offer; I prefer single-purpose themocouple-meters that are typically more accurate have cheaper probes and can monitor and log several probes simultaneously.
 
ShaunCorbs said:
So 60 probably

So conversion factor 0.492

So 1000w at dt29 will require 2033w at rad spec of dt50
Click to expand...
Sorry for not getting back sooner as we have had power cuts

Not sure what you mean here with the conversion factor and the results


I have just got my thermometer with 2x clamps and I am getting a reading of 55C on the flow and 52C on the return pipes from my boiler

The Stelrad K3 are quoted at as delta 50 40 30 75C flow 65C return 20C

55+45
------- - 20 0.5 conversion factor
2

Is this correct?

Would need to be looking at the delta 30 range?

My boiler is a worcester bosch greenstar 32
 
As condensing boiler aim for dt of 20

So flow will be 60c return 40c

60+40/2-21
Mwat Dt29

To get conversion factor as most rad output are at dt50

29/50 xy1.3 = 0.492

Room requires 2931w

2931/0.492

So in dt 50 wattage you will require 5957w to get 2931w at dt 29
 

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