"fred" wrote in message ...
In article , Ed Sirett
writes
On Sun, 23 Dec 2007 16:14:31 +0000, Andrew Gabriel wrote:

In article ,
fred writes:
Keston - Reasonably priced boilers, and flues are formed from low cost
(but inflexible) 50mm muPVC drainpipe. I have a Keston Celsius 25
boiler but I'm not sure I would give it an unqualified recommendation

I ordered a set of servicing spares for mine a few weeks ago thinking
they might arrive by end of March when its service is due, and unlike my
previous experiences, every part was in stock and arrived next day.

BTW, Keston stopped making the C25 over a year ago, although I have seen
stock still for sale quite recently.

Presumably they will be bringing out a replacement model in their range?

Andy had me worried there for a minute but it looks like they have
introduced the Qudos 28 as a mid level domestic replacement that fixes
some of the original issues I had with the Celsius 25. There are separate
control temperatures depending on the demand source with thermistor sensor
modulated control of DHW temp and they promise compatibility with low
grade heat from solar panels in the future. Full list is: Room
Compensation, Weather Compensation, Solar Control, Modulating DHW Reheat,
Solar Thermal, Analog Demand (0-10VDC), External Lockout Signal, Remote
Fascia Panel plus LCD control panel and display of system params (flue
temp, flow/return temp, other temp densors) in installer mode. They've
retained the 20m/50mm maximum flue length and even extended it to 60m when
increased to 65mm. Suffix H is heat only without pump or expansion vessel,
suffix S is a system unit with those parts incorporated.

£722.08 and £788.13 inc vat for the 'H' & 'S' respectively at
discountedheating.

I'm quietly impressed.

The Qudos 28 has a spiral tube stainless steel heat exchanger top mounted
burner design. They went back to their original designs. The Celsius by the
time they dropped it had all it problems ironed out. A late model Celsius
is good buy.

The Qudos is well priced for what it is.