Glass walls…planning to make two 20ft walls in my house?

I’m planning to have two sides of my house entirely build of huge windows from the floor to the ceiling. So glass will be the only thing in between the inside and the outside. Considering I’m building the house in maine and the temperature can drop below 32 for 4 months a year, how will my project do? Is it feasable? Is it crazy? How does glass on heat insulation?