Hi
We are in the processing of designing a passive solar house. My designer tells me not to have low-e on the northern windows as they wont let enough warmth in to warm the concrete floors. This doesn't sound right. What type of glass should be used to let the winter sun in to warm the concrete floors? It would also be good to keep the warmth in at night, but I think we will be using heavy drapes/curtains. Also would be good to be able to keep the heat out during the day in summer.
Thanks in advance for your advice.
Rob