On Jun 4, 12:55*pm, YAPH wrote:
On Fri, 03 Jun 2011 23:13:31 +0100, geoff wrote:
I'll send it on monday if I remember

It's OK, boiler's running now and I suggested to punter he gets new one
ordered up from ****ty Plumbing. Just annoying not to be able to find
vanilla Wilos any more. I'd have stocked up if I'd known they were going
to disappear.


I dont have a smartpump to get the figures from, so these figures are
likely inaccurate...


Cold winter day: 33% run time
summer: almost no use for 4months
8 months 0-33%, ave 16.6% of time - over the whole yr, 11% of the
time

plain pump:
so a 30w non-electronic pump will use about £3.30 per yr in leccy, £33
per decade, £83 per 25 year CH system life

TCO per 25 yrs is thus £25+£83 = £108


smartpump:
vague guess halved energy use - £42 per 25yr life
TCO thus £126+42 = £168

Comments welcome!


NT