Different BTU's for same size rads?

[deajam]

Hi everyone. First post here.

For ease of collection I compared the radiators at B&Q, Screwfix and Wickes. I looked at a 600 x 1200 double and the BTU output was

B&Q 7026btu.
Screwfix 7083btu.
Wickes 7958btu.

All Wickes btu's seems higher than most manufacturers for the respective sizes.

What do you guys think?

 

[bengasman]

wickes rads are karep

 

[TicklyT]

The output from a radiator is related to the temperature difference (Delta T ?) between the radiator and the room it is fitted in.

If the temperature difference is higher, the output will appear to be higher, so you need to know about the conditions under which the output was measured.

 

[Diyisfun]

Hope your design is not that critical

 

[deajam]

wickes rads are karep

Any elaboration on that rather lacking post?

The output from a radiator is related to the temperature difference (Delta T ?) between the radiator and the room it is fitted in.

If the temperature difference is higher, the output will appear to be higher, so you need to know about the conditions under which the output was measured.

Thank you I will try to find out the test details.

Hope your design is not that critical

I don't quite understand? The room needs a 7896btu rad so if I buy the B&Q one it will be under powered by 800btu's but the Wickes one will be fine.

 

[deajam]

The outputs quoted are based on a Delta T of 50°C.

All radiators have been manufactured and tested in accordance with BSEN 442.

 

[Hotcross]

I too have noticed that the Wickes radiators are seemingly much more powerful than others. Is this based on some design or manufacturing breakthrough or are they exaggerating?

For example, I want the most powerful radiator for a 1000mm wall space, the Wickes 600 x 1000mm radiator is quoted at 6631 btu, whereas the B and Q one is only 5856 btu. B and Q also does a 700 x 1000mm one but at 6466 even that is less than the smaller Wickes one.

Are the Wickes values believable or marketing puff?

 

[kevplumb]

depends how they are connected as well

 

[denso13]

For example, I want the most powerful radiator for a 1000mm wall space, the Wickes 600 x 1000mm radiator is quoted at 6631 btu, whereas the B and Q one is only 5856 btu. B and Q also does a 700 x 1000mm one but at 6466 even that is less than the smaller Wickes one.

Are the Wickes values believable or marketing puff?

Different methods for testing the heat output can account for over 11% of a difference which would account for the figures you are quoting.

 

[snb]

the wickes rads are quoted using delta T 60.

they are roughly the same output as the others. stelrad k2 600 x 1200 will give 7092 at delta T 50

You could always fit a 700 x 1200 k2 these give out 8029