But the thing is connected to your heating, so to do any of...

But the thing is connected to your heating, so to do any of those is extra expense for a little use, and theuser would have to have some way to disconnect the heat from the heater to the other source.
It's one of those marketing gimmicks that sounds great in theory until you think of the nitty gritty details. You either have it connected to your heating and it works 24/7 like they are claiming, or the extraheat must be flued outside when you don't need it, or you turn the BlueGen off during the warmer weather.
A by-directional unit so that the heat is flued outside might be an answer, but it is still extra expense.

Basically they (CFU) are having a hard enough time giving the units away, that when it comes to actually having to pay full price, no-one is buying.
They basically took the technology oof a silk purse and turned it into a sow's ear of a product, thatissimply too expensive and the company is unlikely to be around in a few years to service/honour warranty/remove it.