Vaillant Condensing Boiler Ecotec Plus18.

Ray16 · 4 Dec 2010

I changed my old boiler to a condensing type at end of Feb. this year.
During the summer it was on water heating only and did a good job more economically than the old one. Since switching to central heating in the autumn it is using noticeably more gas than the old model, particularly when I turn it up.
All radiators have TRV's and although I have detected the roomstat is not performing properly and will need moving, I do not believe this will be sufficient to cure the problem given that the extra gas usage is up to at least a third more.
My gas meter was changed in August but I am told that it is unlikely to be faulty and that if I ask for it to be tested I will bear the cost if they find it OK.

Any suggestions ?

shorky · 4 Dec 2010

as this appliance was changed in feb this year, have you not asked your installer to check gas rates etc, which he would have no doubt done at the time of install, if i had been the installer i would be curious to know why it was consuming gas at the rate you are assuming, call your installer

lightning · 4 Dec 2010

Ray16 said:
I changed my old boiler to a condensing type at end of Feb. this year.
During the summer it was on water heating only and did a good job more economically than the old one. Since switching to central heating in the autumn it is using noticeably more gas than the old model, particularly when I turn it up.
All radiators have TRV's and although I have detected the roomstat is not performing properly and will need moving, I do not believe this will be sufficient to cure the problem given that the extra gas usage is up to at least a third more.
My gas meter was changed in August but I am told that it is unlikely to be faulty and that if I ask for it to be tested I will bear the cost if they find it OK.

Any suggestions ?

Depends how long you keep your heating on for plus it has got cold earlier and gas prices have got up

Agile · 4 Dec 2010

Just like a new computer people use new heating more particularly as they are more efficient.

In the meantime prices have gone up and we have very cold weather.

Has anyone recently calculated the cost of 100 cu ft of gas, thats one unit on the meter.

Tony

Ray16 · 4 Dec 2010

I send in my meter readings in on-line for my budget plan. They are in cubic metres and I have a spread-sheet of monthly and overall consumption for the last 5 years. It is not a question of prices so much as actual consumption.
My installer cannot account for the increase but has not offered to check the boiler. He points out that the roomstat could be defective and is not in the right area, which I know. I will contact him again and ask him to check the operation, but have the impression he would rather not get invoved.
I am grateful for the replies so far.

Regards.
Ray16

YELLERBELLY · 4 Dec 2010

what was your old boiler?

shorky · 4 Dec 2010

but have the impression he would rather not get invoved

i am sure he will if he has the intelligence/or knowledge of what to look for, and as long as you are prepared to pay for his time if its not anything to do with his install, or no fault at all.

Agile · 4 Dec 2010

Your new boiler is virtually unable to consume more gas and give out less heat. It burns gas and that produces heat which has to go somewhere in the house.

Your spreadsheet may sound good fun but it totally ignores the main factor which is the outside temperature as its that which determines how much heat you need.

Also you seem to have focussed on the possibility of the new gas meter over reading the consumption. If there was any metering error then the obvious candidate is the OLD meter under reading!

I am not surprised that your installer does not want to be involved. He knows as well as I do that there is nothing wrong with the new boiler.

The thermostat being in the wrong place may mean it controls the heat less correctly but it makes no difference to the fact that all heat you produce has to be paid for.

Tony Glazier

Ray16 · 4 Dec 2010

My old boiler was a GLOWORM SPACESAVER ( 1970'S VINTAGE) and gave good service. Both boilers rate around the 18 Kw mark.

The possibility of a sluggish old meter has occurred to me and I cannot ignore it.

I raised the query in the hope that someone had experienced the same problem and had found the answer. If the other options fail I will call Vaillant.

My thanks to all who have answered.

joesoap1 · 4 Dec 2010

Agile said:
Just like a new computer people use new heating more particularly as they are more efficient.

In the meantime prices have gone up and we have very cold weather.

Has anyone recently calculated the cost of 100 cu ft of gas, thats one unit on the meter.

Tony

Hi, Been monitoring mine for last 6 weeks.Scottish power.£1.price rise , so add 2% now.That,s their cheapest tarriff, Leeds

harold5 · 4 Dec 2010

your new boiler will use 21kw heat input if not range rated. what was your old boiler set at ? do you know ? if not then how can you compare.do you never alter your trvs,never alter the roomstat/timer.what model spacesaver was it.?

Biggles.. · 4 Dec 2010

if its a 418 then it could possibly be true.

ive had a few now where the dungs gas valve has been leaking when the boiler runs.

1 particular case the house owner has succesfully claimed all his gas bills back from vaillant,took a legal battle but he did it.

Bunnyman · 4 Dec 2010

Lcgs that sounds ****** to me!!

Untitled

Bunnyman
26 Mar 2010
499

The831Bunny · 4 Dec 2010

lcgs said:
if its a 418 then it could possibly be true.

ive had a few now where the dungs gas valve has been leaking when the boiler runs.

1 particular case the house owner has succesfully claimed all his gas bills back from vaillant,took a legal battle but he did it.

That's interesting. Have had very high CO with normal CO2, especially on minimum fan speed, but no GV passing. Didnt trigger f.62 then?

Biggles.. · 5 Dec 2010

Bunnyman said:
Lcgs that sounds **** to me!!

Untitled

Bunnyman

26 Mar 2010

499

As I'm not into filling people with info that's full of **** Pm me, I'll send you the address and the gs engineers name and job sheet having swapped the valve or you can happily give the customer a call.

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Vaillant Condensing Boiler Ecotec Plus18.

YELLERBELLY

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