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Apr 9, 2013
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I need a new combi boiler for a modest 2 bed flat, 1 bathroom. Priority is good build quality, reliability and after sales service. What's better between the Worcester-Bosch CDi and Si models? Or should I consider another make? Opinions very valuable at this point - need to decide! Thanks.
 
Each engineer has a different favourite. Mine is because I have fitted many Vaillant’s. Only had a problem with 2 and Vaillant came and fixed them promptly. But someone will be probably be along shortly to say the complete opposite.😛😉
 
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Each engineer has a different favourite. Mine is because I have fitted many Vaillant’s. Only had a problem with 2 and Vaillant came and fixed them promptly. But someone will be probably be along shortly to say the complete opposite.😛😉

The Ecofit Pure is the compact version - is this any good? The Ecotec Pro is bigger - any advantage there?
 
I haven't looked at Baxi yet. Viessmann has some good feedback, but I'd prefer a common model with easy to get parts. I've been reading more reviews of Worcester Bosch and Vaillant. Fitters seem to prefer the Vaillant - easy to fit and repair and good quality parts is the general comment. W-B has the best guarantee and service feedback. Some fitters say it's easy to fit, others say it's frustrating with some sharp parts in it. W-B is cheaper to buy and repair in terms of parts, but Vaillant is a very common make and should be easy to service. W-B is more compact and takes less space, but maybe at the expense of being harder to work on? In terms of Valiant I have no real feedback on the EcoFit Pure - that's a bit of a mystery. Between the Pro and Plus models it's not clear - there are fans of both. I believe they both have stainless steel parts which is an advantage over aluminium.

More views welcome....
 
I would defo agree with going for a common model .
Been their before going more off spec never a good thing.
 
If you want a well known brand go for the cdi , avoid the baxi 600 they are having issues as with all new model boilers , i am recommending Atag top end 10 year warranty and intergas 6years warranty for middle of the road. Kop
 
Well if you go with the cdi make sure you have every part listed kept n the garage as they fall apart for fun.
Loads of them round here reckon life span no more than 8 to 10 years.
 
Issues with the 600 ?

How its a scaled down duo-tec which has been around for years all brass inside and now centred flue.

They have had some issues with eco-blue.

Most issues down this way with baxi's are blocked plates due to bad installs.

Issues with worcester's start the second the box is opened!!!
 
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Issues with the 600 ?

How its a scaled down duo-tec which has been around for years all brass inside and now centred flue.

They have had some issues with eco-blue.

Most issues down this way with baxi's are blocked plates due to bad installs.

Issues with worcester's start the second the box is opened!!!

Atm it's quality control issues

And have to disagree with you about the cdi series

What's breaking down on them ?
 
As with alot of new model boilers it takes a while to iron out niggling faults , the Ideal Vogue is another possiblity and has a 10year warranty, as you can tell ask 10 boiler installers which boiler they would recommend you will receive at least half a dozen different answers , talk to your installer and get his advice and experience. Good luck kop
 
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Much as I like the idea of a compact combi in my kitchen, it's looking like you need enough space inside the casing to properly lay out all the parts in a way that they can be easily installed and serviced. So I've eliminated the W-B Cdi and Si in the light of a number of comments on their build and installation. This leaves a lot of quality makes like Veissmann, Atag and so on. But in view of easy parts availability I'm still thinking W-B and Vaillant. For W-B it would be the 30i and for Vaillant the Pro or Plus. Not sure between these three, but at least it should be a step up from the compacts. That's my current thinking, if anyone would like to comment on that.
 
"I currently have the 30i in my own home and it' pretty loud the pump drones like hell".

How old is this model? I believe it's been revised recently?
 
We have been in our current home for 6 months and was installed just before we moved in.
Personally far from impressed
 
Depends if you would like to run another tap at the same time or not and what litres a minute you have at the moment.

Where in the world are you?
 
I'm in Kensington, London. Just run a bath - no other taps. I have an old Main Medway which fills a bath fine. Doesn't need to be steaming hot, just hot.
 
Yes - storage heaters at the moment. Central heating should be nice. Since it's just 75 sq metres, may not need more than 3 decent size ones. Large bedroom, lounge and hallway.
 
Atag ic economiser 27 is big enough for a flat i fitted one for myself with the one control smart thermostat, i am now fitting them as my top end boiler install, Intergas is a close second great value and very versatile boiler both with long warranties good luck with your choice. Kop
 
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Atag ic economiser 27 is big enough for a flat i fitted one for myself with the one control smart thermostat, i am now fitting them as my top end boiler install, Intergas is a close second great value and very versatile boiler both with long warranties good luck with your choice. Kop
Did you fit their stat as well KOP?
 
I'm getting confused as well, but about what size combi I can stand to have in my small kitchen. The combi will go above the draining board to the right of the sink. It's the depth that's the question - how much it stands out from the wall. The ATAG has a depth of 355mm which is a lot. The website says they have a compact version which is 275mm deep but no info at all on it. I was looking at the Baxi DuoTec 33 as well and that's virtually as big - 345mm deep. The Valiant Ecotec is 338mm. Not huge differences but a lot more than 275mm. The thing is that the Baxi and the ATAG get the best reviews for build quality - better than Vaillant or W-B.
 
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Aluminium heat exchanger on the Pure. The Baxi 600 is stainless steel plus some brass parts and copper tubing. Mind - it's still untested for reliability since it just came out.
So is the ecofit. Untested that is. No known problems with the Vaillant though as yet and I would take Vaillant over Baxi any day at the minute. Waiting for the 600 to be on a flyer before I try my first one
 
The slim ATAG is the same boiler but uses a remote expansion vessel.
The 27 economiser will give the same hot water as all the other 30kw combis (you get 3kw free from the heat recovery)
 
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The slim ATAG is the same boiler but uses a remote expansion vessel.
The 27 economiser will give the same hot water as all the other 30kw combis (you get 3kw free from the heat recovery)

Thanks for that - I must ask ATAG about it. My thoughts at the moment are very much towards the new Baxi 630. Looks well made and well laid out - there are some videos on YouTube showing how it works and I'm liking what I am seeing.
 
You have to do what you thinks best mate. At the end of the day it’s you that has to live with the decision.😉
 
There's been a few complaints with the 27 not being man enough/ not enough flow

Think one was from @king of pipes
Not so much under powered shaun it will produce 12 litres a minute at 35 degree rise about the same as its competitors and has a pre heat feature , i added 10 litre a minute tap areator to my bath tap and 8 litres a minute to the shower and basin and kitchen tap water is piping hot even with a 5 degree incoming temp it did struggle a bit at full flow but it was 16 litres passing through it , probably would have fitted the 35kw but i can live with it .
 
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No firm decisions yet, but I think I'm going for a slimmer depth, under 300mm. ATAG or Vaillant EcoFit or Baxi 630. All pretty new models so feedback isn't plentiful, so it's good to have some opinions here.
 
No firm decisions yet, but I think I'm going for a slimmer depth, under 300mm. ATAG or Vaillant EcoFit or Baxi 630. All pretty new models so feedback isn't plentiful, so it's good to have some opinions here.
The ATAG does not have a built in vessel. Just remember that. So you will need space for a vessel somewhere.
 
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I was liking the Baxi 630 until I looked more closely and saw it's basically a Remeha Avanta Plus, which doesn't have such a great track record. It does look pretty simple and well laid out, however.
 

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