================================= I have done so and I note that you still haven't produced pictures of your personal installation. How many (approximate figures will do - you're obviously very busy installing them in large numbers) warm air systems have you personally installed recently and where can they be inspected?
If the system is as superior as you suggest then you would be setting an example to all those poor ignorant people who've chosen an inferior system.
It hasn't yet occurred to you that people vote with their feet and they clearly haven't yet voted in large numbers for warm air heating, and there's nothing to suggest that there is any large scale movement in that direction.
I repeat - people seek advice and choose what they want, not something dictated to them by someone prepared to condemn a whole industry as incompetents.
I also repeat the question posed by the OP - "Warm air alternatives". Your suggestion of 'warm air' as an alternative to 'warm air' doesn't make much sense.
Cic.