Feather river doors 63 5 in.
Most energy efficient glass doors.
Most modern glass doors with metal frames have a thermal break which is a plastic insulator between inner and outer parts of the frame.
This means doors can provide more insulation than a window or skylight can.
Low emissivity low e glass is a glass coating that improves the energy efficiency of your windows and patio doors.
The energy star most efficient 2020 designation recognizes the most efficient products among those that qualify for the energy star program.
Doors are a little different.
Access the full energy star most efficient certified products list in excel excel 57 kb.
Energy efficient windows use an energy rating scale from a to e.
Both frame and glass are assessed and given a rating that indicates the overall impact of fitting that window in your home.
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.
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.
Additionally this glass blocks most of the sun s harmful uv rays helping.
Glass or patio doors especially sliding glass doors lose much more heat than other types of doors because glass is a very poor insulator.
In the winter low e glass reflects heat back into the room keeping it warmer.
These sliding glass patio doors represent the leading edge in energy efficient products this year.