Fresh Air Cold

When I was growing up, I lived in a house that had forced hot air steam heat from radiators...The house was old and drafty, but keeping the steam heat high kept us comfortable... I can not imagine the cost to my parents to keep the house comfortable.

I now live in a house that has energy efficient windows. I enjoy the nights, including in the summer, when the air is so fresh and cool that I do not need to run the air conditioning but with the windows open, the air is cool and comfortable.

As the seasons change, so does the air... The main point being, that the outside air can make the inside air fresher....