On Tue, 21 Sep 2004 18:00:36 +0100, "IMM" wrote:



Alpha say:
"When the store is fully charged an equivalent domestic hot water output of
50kW gives a flow rate of 18 litres per minute at 60°C, enough to fill an
average bath in about 3.5 minutes.

This is bull**** marketing like music power on amplifiers.

It is not an equivalent power output of 50kW because it lasts for a
short time.

Plugging the numbers in, the boiler will deliver 90 litres of water,
mixed with cold at bath temperature. It will take longer than 3.5
minutes to do it as well.

After that, the remaining 60 litres of water needed for the bath will
be at 11lpm.


If the store did run out 11 litres/min will still top the bath up. So, an
average bath can be filled quicko. Showers will be high pressure.

Take no notice of amateur
know-it-alls,

Quite.

a large flow combi is ideal for you.

Except that this isn't one.

That's if you have seen large flowrate combi. This man is wanting info to
make a decision on a water system for his home. For his situation and needs
the Alpha and Greenstar 40kW are ideal.

They are completely different products.

The Greenstar could be considered to be "high" flow rate if you
consider 16lpm at 40 degrees to be high flow rate. A storage system
can outperform that in every way.

The Alpha has a tiny store and a standard sized burner and is very
limited as a result. The marketing information that you have read is
not borne out in the technical specs.





..andy

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