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www.ultimatehandyman.co.uk Forum Index -> Plumbing Forum
-> Central Heating & Boilers |
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alisoncroft
Junior Member
Joined: 14 Nov 2007
Posts: 10
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 Posted: Wed Nov 28, 2007 12:04 pm Post subject: central heating combi boiler |
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We have a large house in Brugge....property prices here much cheaper than the uk....we have 2, 22 year old boilers, but only one working at present...54kilowatt....the bill last year was horrendous....so we want to change them for something cheaper to run.
We have been advised to go for a 90kilowatt boiler.....arm and a leg job. the calculatins based on the outside temperature of -10.
My husband has done all the calculations on-line, basing it on 0 degrees outside...and thinks that 2.. 28 kilowat boliers will do the trick. One controlling the downstairs, put into 3 zones. The other one doing the bedrooms upstairs.
Any ideas on which would be the better system? |
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8036
Location: East Devon
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| Posted: Wed Nov 28, 2007 12:49 pm Post subject: |
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90kW is rather large for a house 
I think to get the best advice and suggestions from the heating exerts on the forum, you will need to provide more info - # of bedrooms and reception rooms as a minimum.
I *think* Combi Boilers are often not regarded as the best option in larger houses, as they don't tend to be able to deliver simulateneous hot water at high flow rates to more then 1 or 2 outlets
_________________
I went to a bookstore and asked the saleswoman, "Where's the self-help section?"
She said if she told me, it would defeat the purpose. |
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alisoncroft
Junior Member
Joined: 14 Nov 2007
Posts: 10
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| Posted: Wed Nov 28, 2007 1:39 pm Post subject: central heating |
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The combi boilers are just for heating....not hot water, they don't tend to do water on the central heating circuits over here for some reason.
The house has 5 bedrooms...large ones....4 receptions..... When we did our calculations we put all the room sizes + size of windows etc into the equation....and for each floor it came up with 24 kilowats.
As we work from home the 4 zone system seems best as we are only in 2 zones at any one time. But we have been told we should keeping the heating set on a minimum 16 degrees at all times all over the house...so the boilers don't have to work so hard to get up to temperature. One chap even said 18 degrees, which is what he has in his house.
In the UK our central heating went off at night, and we switched it off during the day when we weren't at home.
What I am interested to know ....is it cheaper to run 2 smaller boilers....or the one big one...say 60kilowats....the 90 one was about €10000 just for the boiler alone.
And is it more cost affective to keep the house warm say at 16 degrees and just boost it up when needed...or to heat it up from a colder temperature. We have the big cast iron rads, they take a while to heat up, but seem to stay hot for longer. |
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8036
Location: East Devon
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| Posted: Wed Nov 28, 2007 1:55 pm Post subject: |
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Hopefully you will get some good advice later on this evening when the heating experts are likely to log on.
It sounds to me that the Belgium ideas on effective house heating are a little ( ) behind the times
_________________
I went to a bookstore and asked the saleswoman, "Where's the self-help section?"
She said if she told me, it would defeat the purpose. |
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alisoncroft
Junior Member
Joined: 14 Nov 2007
Posts: 10
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| Posted: Wed Nov 28, 2007 2:11 pm Post subject: central heating |
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| Sorry...my mistake....not a combi boiler....a condensation boiler. |
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4296
Location: Bournemouth
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| Posted: Wed Nov 28, 2007 8:34 pm Post subject: |
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90kw is far too big...
a 4 bed house in the uk, has say a 28kw boiler.
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www.hintonheating.com
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