In the winter low e glass reflects heat back into the room keeping it warmer.
Most energy efficient glass doors.
Access the full energy star most efficient certified products list in excel excel 57 kb.
Additionally this glass blocks most of the sun s harmful uv rays helping.
The energy star most efficient 2020 designation recognizes the most efficient products among those that qualify for the energy star program.
Low emissivity low e glass is a glass coating that improves the energy efficiency of your windows and patio doors.
Many doors don t have any glass like your front door but even doors with lots of glass like a sliding patio door have lower glass to frame ratios than windows or skylights.
Both frame and glass are assessed and given a rating that indicates the overall impact of fitting that window in your home.
Most modern glass doors with metal frames have a thermal break which is a plastic insulator between inner and outer parts of the frame.
In the summer it reflects heat away from your home keeping it cooler.
Models with several layers of glass low emissivity coatings and.
To choose the most energy efficient window look for the bfrc rating and remember an a rated window is more energy efficient than one that s c rated.
Doors are a little different.
Feather river doors 63 5 in.
Rochester patina 1 2 lite unfinished smooth left hand fiberglass prehung front door with sidelites model 873190 3a4 139.
These sliding glass patio doors represent the leading edge in energy efficient products this year.