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Craig

Interesting chart data thank you Dan... What is it meant to be showing me? ...That in DHW it's regulating sensor 3 (and therefore the DHW) to 42.9, so condensing? ...erm no Craig, sort yourself out, that doesn't make sense!

erm, what picky?

Corgigrouch wrote: Thanks Corgigrouch... So agreed, not very scientific, but sounds like a pretty good advert to me for the Atag. Those temperatures say a lot!

I first started to look at Intergas boilers about a year ago Dan. I sent a few questions to Steve Merry, and he forwarded them to John Stanford. I particularly wanted to understand what they meant by a 'double high efficiency' heat exchanger, as I felt that was a bit of marketing free-licence...

I wouldn't even go there... I've just opened an 18 page pdf about the SAP efficiency testing of two Gas combi's compared to two oil burners... I regard myself as quite a techy-nerd, but even I was bored sh**less by about the third page!!! Thanks Again!

I understand what you are trying to say just fine Dan. I suppose any boiler could be forced to run inefficiently... too small radiators, or setting too high a system temperature that puts the boiler out of condensing mode a lot of the time. I think I'm just more willing to give the SEDBUK...

In fact, Maybe it isn't an errant figure... seems more like a synthetic figure that is calculated from other aspects of the boiler's performance. This is what the SEDBUK info says:

In the case of your boiler Dan, it's clearly an errant figure in the database... Not exactly unusual to have a few bad values in a database with almost five and a half thousand entries! Hardly seems to me to be a reason to rubbish the whole data-set though; or do you have further experience...

I never said it didn't condense in hot water mode Dan, but even if it is condensing, that doesn't mean it is extracting every last bit of energy out of the flue gasses. I do think that SEBUK's 56% figure may be a little on the low side>>> The manufacturers own figures state: Intergas...

Me too! I got the figure from the SEDBUK boiler efficiency database, and the comparative domestic hot water efficiency of the Intergas is stated as only 56%: http://www.boilers.org.uk/cgi-local/detail.cgi?fone=000256&ftwo=Combi%20Compact%20HRE%2036/30&fthr=%20&ffou=015952&in_blank=123 I...

many Thanks newgasinstaller. Can anyone recommend an Atag registered guy to commission a boiler in Leicester? (Also happy to keep receiving discussion, advice and comparisons between these two Intergas/Atag boilers.) Anyone have anything to say about the DHW efficiency differences...

Thank you for your educated-opinion Dan... much appreciated. my local family-approved RGI is an intergas platinum installer, but had never heard of Atag when I spoke with him, so I've got to also decide whether I should stick with him if I go with the Atag and forgo the extended warranty, or...

Do you have a combi boiler? In my limited experience, Combi boiler Diverter valves often stick or fail in one position, so when you call for hot water, the heated water flows through the radiators as well as (or instead of) the secondary heat exchanger which heats your domestic Hot Water...

Atag A325EC or Intergas Combi Compact HRE 36/30 ? Which of the two would you go for, and Why? I'm in Leicester, and am REALLY struggling to decide which to go for:- They both have a SEDBUK Sap seasonal efficiency of about 90%, and both support a weather compensation sensor. The...