Insulated windows are possible albeit extremely expensive in SF. They need to be: 1.) wooden 2.) vertically opening 3.) same style as the old windows The win

Insulated windows are possible albeit extremely expensive in SF. They need to be: 1.) wooden 2.) vertically opening 3.) same style as the old windows The windows the OP posted are 100% illegal since they do not fit the character of existing windows (wooden and vertical).