Nah nah nah we need to start with passive cooling first, where I'm from houses all have proper shutters that keep the heat out in the summer and the warmth in the winter. I just don't understand why it's not standard in the UK. Oh wait, that might have to do with your windows that open the wrong way round......

All I want is simple really, a 16° bedroom with a 10.5 tog duvet, all year long. What do you mean it's not realistic???