On Sat, 04 Jun 2011 16:09:15 -0700, Tabby wrote:

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

Screwfix Flomasta me-too B-rated pump costs £40, uses 52W on setting III,
40W on setting II - let's assume we use this setting

TCO per 25 yrs is thus £25+£83 = £108

£40 + £110 = £150

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

Wilo A-rated smartpump is £65 at Screwfix so £65 + £55 (same guess: half
the consumption) = £120


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

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