It will be somewhat more efficient, and it will be somewhat cheaper as
long as it's not electric. There are some savings to be made therefore,
but not as much as greeny-weenies think.

As has been said, ZT, all energy coming into your home ends up as heat,
which for maybe seven months of the year is actually desirable.

Switching off your 45W of standby power just means your central heating
system has to deliver 45W more heat to keep the room stat clicked off, so
you don't gain anything. None of this breaks any laws of physics: it's all
about conservation of energy.

You may argue that 45W from your gas supply is environmentally "greener"
than 45W from your electricity supply, which is probably true but it's a
close call. And, of course, we agree that during the summer months that 45W
leakage into your home is actually undesirable, because you're already warm
enough.

Clearly, then, there will be savings by switching to off rather than to
standby, but the crucial point is that these savings are *much* less than
the green pundits claim, and are almost not savings at all during the winter
months.

SteveT