On Tue, 6 Jul 2010 08:53:04 +0100, dennis@home wrote:

I wonder why they don't have a flat plate with a scraper/de-icing boot
to remove the ice?

'cause users would get fed up going out every hour or so to scrape
the ice off. Easier for the control system to monitor the thing and
run the heat pump in the other direction to thaw the ice build up.

--
Cheers
Dave.