Is it possible to fit an effective combi boiler in our house?

sabre01

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#1
Hi all
I was wondering if it would be possible to fit a combi boiler into our house as we have asked a british gas engineer who serviced our hot water boiler and he said there wasnt one on the market to cope? basically we have a 4 bedroom detatched house which already has 11 radiators in that are heated via an 11 year old baxi water boiler, I just thought a combi boiler would be more efficient. thanks in advance for any input.
 

MH

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#2
Yes is the simple answer.

You are probably looking at a 35kw unit.


(TT)
 

sabre01

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#3
Thanks i will have a look now. Do you think we would be able to use the existing radiators or would you recommend fitting new ones? we have had an inhibitor unit fitted from day 1 and the radiators have no corrosion in them.
 

MH

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#4
Again I would say yes, we are changing ours soon. Everything will remain except the boiler.





(TT)
 
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#6
Due to the size of the house and the heating and hot water demand, it would be impractical to fit a combination boiler, I will assume that a 4 bedroom house has 5 people living in it, 2 adults, 3 children.

On average a house will use approximately 135 litres of hot water a day, plus 40 for every occupant.

That's a lot of hot water demand on its own.

Then there's the fact that you have to take into account the construction of the building, do you have double glazing, is everything insulated as it should be etc etc and the frequency of use, if the hot water is used often, for example it's a house full of girls or women and the bath or shower is run constantly your boiler is going to be on hot water most of the time, and the house will be colder as a combination boiler will only have one function running at any one time. This means that when the hot water isn't on demand, the boiler will still be working hard to hear the home. Harder than it should normally have to.

Granted there's no recovery time for the hot water via a combination boiler and this might suit you, but if the boiler is undersized, you can expect a dramatically reduced life from it. Every house is different with different needs, without seeing building plans or the state of occupancy nobody on here would be able to give you a comprehensive answer.

It is not impossible to fit a combination boiler, but the system that was in the house before was designed for your property, what is the reason for change? are you struggling to meet the hot water demand, is the boiler broken or beyond a state of economical repair? A combi boiler is extremely effiencient if it is installed in a situation that allows it to be.

A 1.0 corsa is efficient until you take it on the motorway and make it do 70mph.

If you would like my telephone number to ring me, private message me and I will give you it, failing that reply to this and I will try and give you the best answer I can.

Kind Regards,
Jordan Murray - Gas Engineer
 

nara

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#7
:goodpost: Old thread, so I doubt if it's any use to the OP, but great answer nonetheless.
 

IANB

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#8
Due to the size of the house and the heating and hot water demand, it would be impractical to fit a combination boiler, I will assume that a 4 bedroom house has 5 people living in it, 2 adults, 3 children.

On average a house will use approximately 135 litres of hot water a day, plus 40 for every occupant.

That's a lot of hot water demand on its own.

Then there's the fact that you have to take into account the construction of the building, do you have double glazing, is everything insulated as it should be etc etc and the frequency of use, if the hot water is used often, for example it's a house full of girls or women and the bath or shower is run constantly your boiler is going to be on hot water most of the time, and the house will be colder as a combination boiler will only have one function running at any one time. This means that when the hot water isn't on demand, the boiler will still be working hard to hear the home. Harder than it should normally have to.

Granted there's no recovery time for the hot water via a combination boiler and this might suit you, but if the boiler is undersized, you can expect a dramatically reduced life from it. Every house is different with different needs, without seeing building plans or the state of occupancy nobody on here would be able to give you a comprehensive answer.

It is not impossible to fit a combination boiler, but the system that was in the house before was designed for your property, what is the reason for change? are you struggling to meet the hot water demand, is the boiler broken or beyond a state of economical repair? A combi boiler is extremely effiencient if it is installed in a situation that allows it to be.

A 1.0 corsa is efficient until you take it on the motorway and make it do 70mph.

If you would like my telephone number to ring me, private message me and I will give you it, failing that reply to this and I will try and give you the best answer I can.

Kind Regards,
Jordan Murray - Gas Engineer

Its unlikely hes has not since got this sorted the thread is 3 and a half years old. Good info in your post @Murray59 and we do encourage usefull posting but please try and keep it to more current threads.

Still saying that its a cracking reply with good info ;)
 
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