On Wed, 28 Dec 2005 12:00:24 -0000, "Doctor Drivel"
wrote:


"Andy Hall" wrote in message
.. .
On Tue, 27 Dec 2005 23:09:08 -0000, "Doctor Drivel"
wrote:



The Highflow is NOT a CPSU.

Just seeing if you were awake.....

Sure you were.

Proven. It's taken you this long to reply.

FWIW
According to SEDBUK, a CPSU is defined by having a store at high
temperature (80 degrees or so), with capacity of 70 litres or more and
which also feeds the heating circuit as well as providing primary
water to be pumped through the heat exchanger for the DHW.

In essence, a mini heatbank and boiler in a box.

The Heatflow also has a store heated to high temperature providing
primary water to be pumped through the DHW heat exchanger. The size
is not mentioned by the manufacturer, but judging by the manual, is
less than 70 litres. The store is not used to supply the heating
circuit.

In terms of the way that the DHW is heated, the principle is the same
- it is a matter of scale, and of course the 70 litre store size is an
arbitrary number used to establish a definition.


--

..andy