"TMC" wrote in message
...

Just out of curiosity how much more environmentally friendly are proper
air con systems?
It may be better if I move up to one of those

A split portable unit will be about 20% better than one that uses a hose.

A split unit with the compressor outside is about 50% better but I have
never seen a portable one.

I may replace my portable split unit with a heat pump to provide heating and
cooling instead of the gas boiler.