Is this boiler any good?

Here's the symptoms:

Hot water on - High flow
Hot water begins to get warm - Flow slows
Hot water not touched - Flow slows right down, flow through boiler is slowed and it stops heating, flow pics up and the cycle begins again.

Our combination boiler does that, aprt from the last bit as i keep opening the tap, i assume it was normal as other combis ive used also do it. You just keep having to open the tap more and more if you want the hot water partially on, unless ofcourse you just open the tap fully staight away like you would to run a bath.

svste, i would say worcester bosch are the best and you get 5 years warranty with them, but with 4 floors you don't want to have the boiler fitted on the bottom floor, otherwise you will need one hell of an expansion vessell fitted.
If flow out of one hot tap is ok, then the problem could be either the taps or problems with the supply, ie too much demand, and not the boiler causing the fault.

[BoltonSte]

At the moment the boiler is in the celler (I'd like to keep it there if possible as it is out of the way.

Here's the break down:

Celler - Mains inlet, 2 rads, washer (would like to have a sink later)
Ground - Kitchen, front room, 2 rads (small one in kitchen)
1st - 2 bedrooms, bathroom, 4 rads
loft - Bedroom and ensuite (shower/bath, sink, loo) rad and towel heater thingummy bob that runs off the C/H.

What's the expansion vessel do? At present I'm pretty sure it's a bog standard boiler, but we do struggle with WP if running the loft and Kitchen (hopefully the switch to the mains from the feed will make some diff. to this)

Ste

you can get £400 off the government at moment cant you .? if you changing to a more efficient boiler..

[Old Git]

svste, I used to sell Saunier Duval boilers through a merchants a couple of years ago.
Well known in Europe where they are seen in a much more highly rated light in general.
SD were, when I had connections couple of years ago, part of the vailant group, made in the same derbyshire factory, side by side, I went to the plant & watched.
But...... think they were effectivly discontinued in UK a year ago, they said they were going to pull out & concentrate on supplies in Europe where they got better prices.
I am out of the loop now, so unless someone else has taken up the challenge, IF something went wrong in the future, you may get lumped with a boiler struggling for spares, although as I say many many vailant parts were interchangable.
Baxi used to do 'Platinums' which had I think 5 year guarantee & Worcesters are very good, although my son works for them, so i would say that wouldn't I!!!!!!!!!
Best of luck.

[Old Git]

Originally Posted by Quiff Wichard

you can get £400 off the government at moment cant you .? if you changing to a more efficient boiler..

Think you will find had to be replacing a 'G' rated boiler with high efficiency thou. to comply & must get the leaflet/voucher before it is bought/installed, these are date coded & are only valid for i think 4 weeks from supply, then they are defunked so you have to get em & use em stragiht away to stop people stockpiling them & selling them on.

[BoltonSte]

The current one isn't G rated, it's C/D I think. The same rating applies to the SD one. But there's not a huge amount on the web about them. My main concern was that the weird flow thing and having to run the tap slow to fill the bath hot were down to the boiler.

So for now, I'll stick with what I've got, then I'll upgrade when I do the celler as the boiler needs moving anyways.

Cheers for the input.

Ste

Originally Posted by beabert

Our combination boiler does that, aprt from the last bit as i keep opening the tap, i assume it was normal as other combis ive used also do it. You just keep having to open the tap more and more if you want the hot water partially on, unless ofcourse you just open the tap fully staight away like you would to run a bath.

We have a Vailant combi boiler but don't get any slowing of flow when the water gets hot, the hot tap flows at the same rate at all temperatures, only time we get a slowing of flow is when you open another hot tap.

[BoltonSte]

That's what I thought should happen.

Everytime it gets seviced, they say it's superefficien...it will be it slows down that much it should heat it efficiently.

Ah well, it does the job for the time being.

Ste

We have a Vailant combi boiler but don't get any slowing of flow when the water gets hot, the hot tap flows at the same rate at all temperatures, only time we get a slowing of flow is when you open another hot tap.

So from cold, if you open the tap just enough for a slow trickle, it remains a slow trickle all the way until the water is at its hottest?

I find on the 2 or 3 combis i have had, the trickle stops, so i open it up fully first, wait until its up to temperature then turn it down to a trickle lol.