Obsessing about heating again

newbiejim

newbiejim

newbiejim

Soldato
Joined
22 Jun 2004
Posts
2,693
Location
South Scotland
Yesterday as a sort of experiment I turned my heating flow temp down to 60 degrees C and left it on all day to heat house to 20.5.

  • 1950s 3 bed largish semi, part coombed ceilings upstairs, loft insulation no cavity insulation, so not overly insulated.
  • Boiler: Vaillant Ecotec Plus 831
  • Flow temp: 60c
  • Outside temp: 5c
  • Rads: 8, 3 large, 4 medium, one towel rail.
  • Time On: 8am
  • Time Off: midnight
  • Gas used: approx 350 cubic feet
  • Approx cost: £5

IMHO that's isn't TOO bad, I`m def going to try lowering flow temp more with long slow burn times etc.
Anyone else have any idea how much their heating costs per day etc to heat to similar time/degree?
edit:it did take about 4 hours to get up to temp.
 
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budwozza said:
I have been running my flow temp at 45c for about 5 or six weeks - the idea being that the radiators take as much heat as possible out of the water so the return temperature is as low as possible - this makes the boiler more efficient as it uses its condensing process to better effect. I would suggest that you should turn your flow down to at least 50c to see how that goes.
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Yes that's why I`m doing this, so the boiler condenses most of the time and is more efficient, have you any idea how much it is costing you to do this?, obv there are many variables but might give us insight into sweet spot for performance/cost.
 
Trifid said:
In a day? That can't be right. Or do you mean Kwh? But your cost would be around £15 (which is a lot!)
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I may be misunderstanding the units, my meter is in cubic feet and I just assume it was hundreds?, lol we need someone to clear this up.

Anyways, post British gas price rises for 5 of these 'units' cost £7.14 which is 160.37 kwh x 4.450p, this is from my bill.
 
The_One said:
I wouldnt be turning flow temps down to 50 - 60degrees in order to try and save gas lol

at those flow temps your rooms will take forever to heat up.

Put the boiler stat on max to get the rads red hot then your house will heat up faster and then the boiler can be on less time :rolleyes:
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Yes that's the conundrum, IS that the best way?, u can have ure boiler on for ages at low temp, so pretty much on all the time.....maybe...........its very difficult to get solid information on this, probably because there are so many variables.

It took my house about 4 hours to get up to temp with 60c flow temp.
 
budwozza said:
4 Hours to reach the desired temp? How cold was it to start with and what temp did you try to achieve.

I would suggest that something is not right with your system.
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Nothing wrong with system, I have largish rooms, higher ceilings etc. I would guess your house is of newer construction with better insulation etc?

Initial temps would be quite low, i did check but cos I`m old Ive forgot lol.

Would be interesting to see how much you are using in a day.
 
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