Colder climates want a low ufactor 52 to resist.
Sliding door u value.
1 insulated glass can reduce the u factor by up to 40 by better preventing interior heat from escaping to the outside.
Shgc measures how well a product keeps out solar heat.
It s usually expressed in units of btu hr ft2 of.
Products that use low e4 and low e glass include certain 200 series fixed units and tilt windows 400 series gliding windows roof windows and skylights and several models of andersen architectural window.
Energy performance data for select combinations of options is available in table format on each product page.
U factor is the rate at which a window door or skylight conducts non solar heat flow.
Nfrc u factor ratings however represent the entire window performance including frame and spacer material.
This tool provides some of the most common options on windows and doors and related nfrc certified values.
Andersen doors and windows that use low e4 and low e glass have a u factor between 0 27 and 0 30.
Depends on size temperature and components of the door.
Look for a low u factor.
This is different than r value that would be used to determine the energy efficiency of just the window pane thus a window with a u value of 1 is more energy efficient than an window with a u value of 5.
The label shows the solar heat gain coefficient shgc and u factor for the door.
To access those tables select the individual product of interest and scroll down to the professional resources section.
For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.
The liniar energyplus range contains 6 chambers and can achieve a u value as low as 0 8 w m2k with the correct glazing specification.
The range is from 0 to 1.
The range is from 0 00 2 00.
These sliding glass patio doors represent the leading edge in energy efficient products this year.
Look for a low shgc in a climate that mainly requires cooling and a high shgc in a climate that requires heating.
Most efficient recognizes a subset pdf 701kb.
Access the full energy star most efficient certified products list in excel excel 57 kb.
Illustrations of all energy star window types.
U values are used to determine the insulating efficiency of the window and all of its components.
It is typically used as a measure of heat loss from inside your home to the outside and could be a measure of thermal performance for your walls roof and floors as well as your aluminium windows and doors.