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Discuss Combi Boiler Electricity usage in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. robj20

    robj20 Member

    Since having the combi fitted my electricity usage has shot up.
    Gone from an average of 163kwh a month to 340.
    So even though gas usage is down a lot, electric going up means its costing us more.

    Excuse my rough maths but i have the boiler on for approximately 52 hours a week, so if it was indeed running fully for those 52 hours thats about 210 hours a month. The boiler power usage says 137w.
    So 28.8kwh a month i think would be the max, but its gone up 158kwh last month.
     
    Last edited: Oct 9, 2017
  2. Last Plumber

    Last Plumber Plumber GSR

    I can't see it being Boiler. They only use a small amount of electricity.

    Big users are things like, Electric showers, kettles, immersion heaters etc
     
  3. robj20

    robj20 Member

    It was installed exactly 1 month ago, coincides perfectly with the doubling of power usage.
    If it was something left on it would be about 220w if i worked it out right. So way beyond a light left on or something. Been no increase in any other usage that i can see.

    How can i work out what is using it?

    I was thinking something like this?
    https://www.amazon.co.uk/geo-Minim-...862&sr=8-3&keywords=electricity+usage+monitor

    At the moment its an extra £20 a month in electric so would pay for its self if it helps me track down the usage.
     
    • Optimistic Optimistic x 1
  4. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    What system did you have before theboiler was fitted? I.e. Economy 7/storage heaters?? Might not make a difference but will help to figure it out
     
  5. Last Plumber

    Last Plumber Plumber GSR

    You can only use a process of elimination. You could for example take an hourly meter reading with and without heating working. Or buy a clamp on ammeter to tell you how much electricity you're using and switch things on and off. Thing is, it's possibly a number of things on at the same time.
     
    • Like Like x 1
  6. robj20

    robj20 Member

    An old heat only boiler, with external pump. Very old boiler no electronics in it at all.
     
  7. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Was that just powering the heating or hot water as well? There shouldn't be much of a difference really if it was doing heating and hot water. They would both have a constant 240v supply.
     
  8. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Just a thought but, you have not ran out of contract with your electricity supplier and they have put the prices up have you?
     
    • Like Like x 1
  9. robj20

    robj20 Member

    Just heating, hot water was gravity so no electricity usage.
     
  10. Last Plumber

    Last Plumber Plumber GSR

    Your new Boiler will use more electricity. It will have a motor for the burner fan amongst other things. It will also use a pump over run. However, I cannot see you noticing a major difference on your electric bill.
     
  11. robj20

    robj20 Member

  12. Last Plumber

    Last Plumber Plumber GSR

    Good call!
     
    • Like Like x 1
  13. robj20

    robj20 Member

    Nope. That wouldn't increase usage anyway just the price.
     
  14. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Your gravity hot water would have still been ran through the boiler and have used electricity other wise it would not have got hot
     
  15. Last Plumber

    Last Plumber Plumber GSR

    • Like Like x 1
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