"Brian Gaff" wrote in message
...
I don't know but I'm getting really ****ed off about cleaners. I have a
newish Bosch. It slows right down cos it overheats if yu use it for more
than about 10 minutes on full suck. A Henry very recently purchased has
now a smaller motor and half the muck ends up inside the pipe and has to
be cleaned out every time its used in anything but a dustless house.
What is going on?


As for kettles, I do think more efficent kettles can be made, the basic
designs have not changed since the 1950s.

That's because the basic design from the 50s is 100% efficient

tim