Central heating

southcoastrgi

malc a very good & detailed explanation however i fear you may have wasted your time with the OP as they can't work out why their house is cold because they only have the heating on for 2 1/2 hrs a day & also don't know if they have an immersion heater in their cylinder :huh:

Mgreen

What happens to the radiator if it is turned off . The pipe in particular
Does any happen to that

Mr_Ted

Oh Dear????

macman

I'm beginning to think this is a wind up...

Andy_WSM

Mgreen wrote: »

What happens to the radiator if it is turned off . The pipe in particular
Does any happen to that

Might melt if the hot water can't go anywhere. :rotfl:

"off" certainly won't make your house warmer, you don't need to be Stephen Hawking to work that out...

malc_b

Mgreen wrote: »

What happens to the radiator if it is turned off . The pipe in particular
Does any happen to that

Do you mean can radiators/pipes silt up? The should do if you have inhibitor in the system. Without any water flow rust flakes will lie where they fall. That's probably better than them all being pushed to one place or places by the pump, or perhaps not.

I'm not a fan of having radiators always off anyway. Turn them down to get a lower temperature if you want but you can't keep a house warm if you turn off radiators. Rooms leak heat very easily to each other as most insulation is in the outside shell of the house. So turn off all radiators but one (for example) and that one radiator is trying to heat the whole house, and it doesn't have the output to do that.

I should also add that the hotter the radiators the more output they have. The design temperature is 60C above ambient, so 80C water for a 20C room temperature. That is usually 85C out of the boiler and 75C return in round numbers. Drop the rad temp to 60C and the output is 60% of the 80C value.

ginamccarthy

Mgreen wrote: »

Honeywell timer 18
Radiators on 4 or 5
Upstairs on 4 expect for one room
On from 12.30 to 3. Pm
Boiler temperture 63 degrees

Why does my house get cold

Vaillant Eco tech boiler

Perhaps you need a powerflush of the whole system it gets rid of the build up of sludge in the radiators and makes the heating more efficienct, i had mine done for 199 because one of my radiators were not heating up enough

southcoastrgi

ginamccarthy wrote: »

Perhaps you need a powerflush of the whole system it gets rid of the build up of sludge in the radiators and makes the heating more efficienct, i had mine done for 199 because one of my radiators were not heating up enough

I don't think this has anything to do with it, more like only having the heating on for only 2.5 hrs

ilikecookies

If you want a warmer house you'll need to:

1) Turn your thermostat up - 18 degrees is a little on the low side. I suspect 19-21 is more the norm.

2) Turn up the boiler temperature too. Try at least 70 degrees.

3) Open all the TRVs to 5 and check all rads get hot to the touch.

4) Run the heating for much longer and ideally at key times to prevent the house losing all it's heat (which in turn means you'll need to have the heating on less overall as you'll always be heating from a higher base) - eg. 2 hours in the morning, 2 hours in the afternoon and as many hours at night as needed.

Ultimately if you do the above and the house is getting too hot you can tweak the above settings downwards accordingly until a comfortable temperature is reached. If, however, you find that the house doesn't ever get warm enough then you'll need to identify precisely what the problem is - eg. radiators too small or full of air or sludged up, boiler undersized, TRVs sticking, poor insulation, etc.

Ultimately I'm not surprised that the house is cold using your current settings! The only flip side is that your heating costs will be much lower than if you choose to follow the steps above.

Good luck