I've been looking into getting an Intergas 36/30 fitted at my house by a local installer, however I am an engineer so naturally interested in the specs and workings of these things.
Now the questions I cannot find an answer to is this:
Intergas's datasheet shown a pressure drop curve for the 12mm DHW pipe in the heat exchanger, it's pretty restrictive and drops about 2 bar at 14l/min and with that curve I can't even see how it is possible to flow the rated 18L/min at mains pressure as I'd be dropping in excess of 4 bar across it?
Are plate heat exchangers in normal combis also like this or do they have lower pressure drop? I have searched the internet high and low and cannot find a single bit of info regarding pressure drop in a normal combi plate heat ex to compare it with.
I've measured my free flowing rate at 20 L/min, static pressure is 3 bar and dynamic pressure at this rate is about 2 bar which is good in my opinion.
Going from the intergas datasheet though, I'd struggle to get the rated flow through the heat exchanger, so maybe i'd be better off with something like a Vaillant 837 with conventional plate heat ex?
Any help would be much appreciated.
J
Now the questions I cannot find an answer to is this:
Intergas's datasheet shown a pressure drop curve for the 12mm DHW pipe in the heat exchanger, it's pretty restrictive and drops about 2 bar at 14l/min and with that curve I can't even see how it is possible to flow the rated 18L/min at mains pressure as I'd be dropping in excess of 4 bar across it?
Are plate heat exchangers in normal combis also like this or do they have lower pressure drop? I have searched the internet high and low and cannot find a single bit of info regarding pressure drop in a normal combi plate heat ex to compare it with.
I've measured my free flowing rate at 20 L/min, static pressure is 3 bar and dynamic pressure at this rate is about 2 bar which is good in my opinion.
Going from the intergas datasheet though, I'd struggle to get the rated flow through the heat exchanger, so maybe i'd be better off with something like a Vaillant 837 with conventional plate heat ex?
Any help would be much appreciated.
J