On Tue, 14 Nov 2017 05:32:35 -0800 (PST), whisky-dave
wrote:

snip

http://wiki.diyfaq.org.uk/index.php/...Worked_Example

Think about it and you'll realise the where the biggest error would be.

Erm yes ...

So where ?

You mate. ;-)




So, you either try stuff (different types / sizes of heater) or buy
some hats, gloves and coats. ;-)

for 420 students yeah great idea.

Sounds like it could be better and cheaper than the non solution you
have now?

Cheers, T i m