Convector Radiators

[Vasos Aahm]

Hi All, I live in a well insulated and warm house but since having my old radiators replaced by convector rads I have noticed the room temperature increases quickly when the c/heating is switched on (which is great) but then decreases within an hour of switching off the c/heating. My old rads would take longer to heat up but keep the house warm for hours afterwards. I have three large double rads downstairs and three single rads upstairs. Any explanation would be greatly appreciated.

 

[Newboy]

Most likely you new radiators are more efficient at transferring heat from the water inside to the air. If you had very old radiators then the mass of the radiator itself may have been large compared to your new ones and hence have taken longer to heat the radiator and longer to cool.

 

[Madrab]

New rads, higher thermal transfer efficiency so you need to re-learn how to use your system to maintain your desired comfort factor.

 

[D_Hailsham]

I have noticed the room temperature increases quickly when the c/heating is switched on (which is great) but then decreases within an hour of switching off the c/heating.

Why did you replace the radiators?
How are you controlling the temperature inside the house?

 

[Vasos Aahm]

The old rads were leaking and developing spots of rust. I've set the TRV's on the new rads to 3 on the downstair double rads and 5 on the single upstairs rads. I control the overall house temperature by the room stat.

 

[D_Hailsham]

Why do you want the upstairs rooms hotter than downstairs? It's normally the other way round.

 

[Vasos Aahm]

This isn't the case. The single upstairs rads on 5 are, in fact far cooler than the double rads on 3 downstairs.

 

[Mottie]

Perhaps the system needs balancing?