Too much glass can be a pain to decorate around and to place furniture. I would gladly wall up some of our windows if it was feasible. Might be a consideration in your place to cut down on the double glazing. 

Eva888:

 

Too much glass can be a pain to decorate around and to place furniture. I would gladly wall up some of our windows if it was feasible. Might be a consideration in your place to cut down on the double glazing. 

 

This is true. I ended up mounting the TV from a ceiling bracket so it now floats above the unused fireplace.

But the glass is beautiful and an architectural feature. Would be sacrilege to mess with it.

johno1234: So will likely end up double glazed

My friend invested in double glazing and ducted heat pump for his family this summer. 
Did cost them a lot upfront but they were finding the bedroom for their daughter was getting cold and damp, and they worried about health conditions.
While he hasn't gone through winter yet, he has said the double glazing was a game changer for how warm and dry his house has been since it was fully installed. 

One of the comments that stood out to me was saying how he felt the cold air was always creeping into the house, and now it doesn't feel that way.

kotuku4: I use a heat pump in living area to heat the whole house. Full electric house, additional ceiling insulation, retro fit double glazed, solar PV and hot water diverter/controller. I spend around $1000 a year on energy. I think improvements payback well, if you have a long term home.

just for others sake,  heating a house via one heat pump in the living room is not recommended and generally does not work well.

heat pumps are sized for the room. it also takes a very long time for heat to travel through to the rest of the house.