I smell bullschit. Are they saying their heat exchanger is 100% efficient?:
But that is a 39kW boiler, which the Intergas isn't so lets try and even things up and go to as close to equivalent outputs/inputs as possible. So lets take the Modena 32, which is 0.7kW under the Intergas 36/40 which is as we have established not 40kW to hot water, but actually 32.7kW. Ferroli claim this:
Again - they seem to think their heat exchanger is 100% efficient, but then it probably is the same as the 38C, so go figure.
Intergas:
(Obviously we're looking at the right hand column for each).
Laws of physics seem to be different for our Italian brethren. Especially as said laws, even assuming 100% heat transfer state that at input of 32kw, ΔT35 you can get 13.06 l/min.
So how the feck does Ferroli manage to get 15.3 at both ΔT's? If we take ΔT30, that gives us 15.24l/min.... but again at 100% transfer efficiency. Which we ain't gonna get. Ferroli manage to squeeze another 0.3 l/min on top of their 100%.
Now, we give the same calculations to the Intergas figures?..... This gives us 13.35 l/min at 32.7kw input and an assumed transfer efficiency of 100%. Put that to ΔT30 and that rises to 15.57 l/min. IF we use Intergas' figures of ΔT25, it is 18.69. Ferroli - a slightly more modest differential of 0.1 litre a minute. Again assuming 100% heat transfer.
Of course we can't have 100% so a bit of a reduction ius in order. Something Intergas has done. But Ferroli?
Now - a few pages back Hard On stated:
The Ferroli Modena has a model, the 38C, that can give 16 litres per minute in hot water delivery, which is quite impressive. The 32C gives 13.1. The 32kW Ferroli gives the same hot water flow rate as a 36kW Intergas. The intergas range cannot get give more than 13 litres per minute.
Where did he get 13.1 and 16 litres per minute from? Fecked if I know, but it was the actual figures from the performance tables.
He was also prattling on about modulation rates.... let's take a look shall we?
Ferroli:
Intergas:
Only 1kW in it. Not bad, but not great either, yet something that was acknowledged a loooong time ago.
Now, who is spanked by who? Where are Hard On's figures to counter these? Is he going to go on about the 40kW intergas (which doesn't exist) against the 38C Ferroli with its imaginary performance statistics? Probably, but that is, as said before and the reason for the likes of KIWA, comparing apples with oranges.
Like I said before though. Since when has fact got in the way of a Googleer and their rants/trolling? Twentyfour only appears now and again for a troll too - I've seldom seen him give any advice in other threads. So we can take his opinion with the vomit soaked vindaloo it's worth. Out of all this nonsense we have Bernard who does at least try and base some of his opinion on fact. Although more often than not fails (still waiting for that admission BTW dude). A simple "yes I was wrong" will do
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