But 110.9 is the Part Load efficiency (36/30°C), not the Sedbuk rating, which is about 90%. This gives a saving £1.5 per month. Big deal - wouldn't even pay for the annual service.Lets assume what they print is correct Atag Q 110.9 % efficientWhat would be your projected saving on my £45.00 a month standing order, assuming my Servowarm is 87%.
50p a month perhaps, or less.
According to Atag's glossy brochure the Q series is 97.5% efficient at full load. I don't know how they get these figures or why they differ so much from the Sedbuk ones.
D
Deleted member 105431
you still haven't explained how the atag would probably use more gas as you said earlier doitall.
Because I seriously think it would, if you forget all the hype and un-supported trash that most manufacturers have you believe.
See Dave's post, and already we are getting very close, factor in the very low output I'm getting which the Atag or any other boiler can not achieve, and at best there will be no different, it would be interesting to run the two side by side on equal loads.
Saying all this, I'm still considering a small Avanta or Atmos combi as a replacement if it ever stops raining, being a single occupancy with just a shower, there should be benefits in getting rid of the cylinder.
D
Deleted member 105431
e22s 4.4kw-21kw; weather comp'd would definately use less fuel as it would stay in condensing mode most of the time except on the coldest days of the year.
the science is indisputable.
the science is indisputable.
Perhaps I should donate my antique boiler to Science
A certain science website, will have you believe that the average cost effective life of a modern condensing boiler is 3 years. Admittedly that was 4 ish years ago and they may have improved a tad by now.
A certain science website, will have you believe that the average cost effective life of a modern condensing boiler is 3 years. Admittedly that was 4 ish years ago and they may have improved a tad by now.
D
Deleted member 105431
maybe they based their study/research on the ideal icos/isar in which case they'd be about right.
The problem with Science and boiler manufacturers, is efficiency is a meaningless word, it's only as good as they would have you believe.
For example, if I run a 95% boiler and a 85% boiler on two identical systems for 24hours, what would be the gas usage for both, and how much more would the 85% use.
Also if two different manufacturers boilers are rated at 95%, would they have the same fuel consumption.
My answer would be not a lot and no.
For example, if I run a 95% boiler and a 85% boiler on two identical systems for 24hours, what would be the gas usage for both, and how much more would the 85% use.
Also if two different manufacturers boilers are rated at 95%, would they have the same fuel consumption.
My answer would be not a lot and no.
I recommend the Strathclyde University Report for a bit of informative reading.
But it doesn't answer the question Dave.
Is efficiency a recognisable number.
Is 95% the same number for every boiler.
Isn't efficiency dependent on the system it's connected too.
For example a 85% boiler on a really efficient system, could in fact be more efficient than a 95% on and old draughty barn.
Is efficiency a recognisable number.
Is 95% the same number for every boiler.
Isn't efficiency dependent on the system it's connected too.
For example a 85% boiler on a really efficient system, could in fact be more efficient than a 95% on and old draughty barn.
Wasn't meant to! Just thought it would cause a lull in the discusssion while everyone digested the contents.
Not sure what you mean by this.
What I was sort of getting around to, having a scrappage system, whereas ripping an old Ideal boiler out and replacing it for a super efficient Atag, in an old farm house with no windows, would pretty much be a waste of money, unless the occupant spent at least another £20K on upgrading all the doors and windows, insulation etc..
Just to add to this, my neighbours had a Vaillant ecoMAX combi boiler installed 10-11 years ago, it has only broken down once or twice but other than that it has been working very nicely.
One of the times when it broke down was when it was moved, it was left on the floor for a few days and failed to work when it was hung in it's new place.
And as far as I know it's hardly serviced!
10-11 years, a good lifespan for a condensing boiler?
One of the times when it broke down was when it was moved, it was left on the floor for a few days and failed to work when it was hung in it's new place.
And as far as I know it's hardly serviced!
10-11 years, a good lifespan for a condensing boiler?
Purely from a customer point of view (I have no vested interest in boilers!) I wouldn't want a new boiler.
When I lived in MK my parents bought their house new in 1982. My mum and I lived there until 2002 when she moved to Norfolk and I moved to another house in MK. In 20 years the Baxi boiler never failed. It wasn't serviced every year until my mum took out the British Gas service plan about 5 years before we left.
In comparrison, when she got to her new house in Norfolk the existing installation (I don't know how old it was) was leaking so she had to have the whole lot replaced. She was advised to get a Glow-Worm boiler which has since broken down twice in 7 years.
Meanwhile, I rented a house in Swaffham which had a combi-boiler. It didn't work correctly and I was finally (after 3 months of going on about it) able to get my landlord to get it inspected. The chap from Vokera said he wouldn't put a combi in his shed and I agreed with him. They are so uneffcient! It would take several minutes of running the hot tap before any hot water came through. The heating was next to useless. I was told this boiler had been in less than 3 years.
I just hope, wherever I end up next, I have a proper boiler with a water tank as that combi cost me so much in wasted water it was unreal! I ended up not bothering and just using the cold tap everytime, so the boiler didn't kick in and waste gas and electricity while it thought about heating the water! Utter rubbish!
I'm with doitall and the other posters who say that keeping an old boiler is preferable to getting a new modern one. If modern boilers are all as useless as the two mentioned above why would you want one? Being efficient 90% of the time is only relative. If the boiler's 90% efficient, but you have to waste a couple of litres of water to get it hot, then it's not 90% efficient is it? With a proper, old boiler, I at leat know that when I turn the hot tap on I'm going to get a handful of hot water!
That's my tuppence worth from a laymans point of view.
When I lived in MK my parents bought their house new in 1982. My mum and I lived there until 2002 when she moved to Norfolk and I moved to another house in MK. In 20 years the Baxi boiler never failed. It wasn't serviced every year until my mum took out the British Gas service plan about 5 years before we left.
In comparrison, when she got to her new house in Norfolk the existing installation (I don't know how old it was) was leaking so she had to have the whole lot replaced. She was advised to get a Glow-Worm boiler which has since broken down twice in 7 years.
Meanwhile, I rented a house in Swaffham which had a combi-boiler. It didn't work correctly and I was finally (after 3 months of going on about it) able to get my landlord to get it inspected. The chap from Vokera said he wouldn't put a combi in his shed and I agreed with him. They are so uneffcient! It would take several minutes of running the hot tap before any hot water came through. The heating was next to useless. I was told this boiler had been in less than 3 years.
I just hope, wherever I end up next, I have a proper boiler with a water tank as that combi cost me so much in wasted water it was unreal! I ended up not bothering and just using the cold tap everytime, so the boiler didn't kick in and waste gas and electricity while it thought about heating the water! Utter rubbish!
I'm with doitall and the other posters who say that keeping an old boiler is preferable to getting a new modern one. If modern boilers are all as useless as the two mentioned above why would you want one? Being efficient 90% of the time is only relative. If the boiler's 90% efficient, but you have to waste a couple of litres of water to get it hot, then it's not 90% efficient is it? With a proper, old boiler, I at leat know that when I turn the hot tap on I'm going to get a handful of hot water!
That's my tuppence worth from a laymans point of view.
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