On Mon, 14 Nov 2016 17:59:29 +0000
Roland Perry wrote:
In message , at 16:36:30 on Mon, 14 Nov
2016, d remarked:
Why should we
only be able to buy feeble vacuum cleaners and slow kettles?
The reduce our C02 footprint.
No they don't. A given amount of water requires a certain amount of energy to
boil no matter at what speed you do it.
If it boils slower you'll out less water in, and that's where the saving
comes from.
So its nothing to do with efficiency, its wishful thinking about human nature.
In fact you'll use more energy doing
it slower since you'll have greater heat loss over the longer time period. As
for lower powered vacuum cleaners, all that happens is people will use them
for
longer if they're not doing the job properly.
Many vacuum cleaners create more suction than necessary "because they
can".
Well if mine is anything to go by it doesn't create enough.
--
Spud