On Mon, 06 Jun 2011 20:51:13 +0100, Steve Walker wrote:

You've missed that the inefficiency produces waste heat, which is of
course not wasted at all, because you wouldn't be running the pump if
you didn't want heat!

Depends when and where the heat is generated: in summer on a system with
stored hot water the heat generated by the pump is liable to be wasted,
and in winter it may be wasted if the pump is somewhere that's warm
enough anyway.

Although it's piddling amounts we're talking about he less than a
single half-decent lightbulb, and regulating to mandate the more
efficient pumps seems to be a case of straining after gnats.

WILO's (presumed) withdrawal of their standard-efficiency pumps means
anyone with a Biasi with a failed pump is faced with paying more and
waiting longer for a new pump head from Biasi rather than a cheaper
generic WILO one. Which probably serves them right for buying cheap crap
from B&Q anyway. :-)


--
John Stumbles -- http://yaph.co.uk

Religion is like a penis. It is fine to have one. It's ok to be proud of
it. Just don't wave it around in public or try to jam it down my child's
throat.