Exterior Door U Factor

Therma tru offers a wide selection of fiberglass 20 minute fire rated doors for protection with a sense of style.

Exterior door u factor.

It basically tells you how well a door or window insulates the home. Any glazing area in exterior doors should be included with the appropriate glass type and analyzed as a window. U factor is the rate at which a window door or skylight conducts non solar heat flow. For example a building with material with an r value of r 11 converts to an u value of 0 09 1 r or 1 11 0 09.

Shgc measures how well a product keeps out solar heat. If the door is equal to or less than 50 percent glass it is considered to be an opaque door. A u value also known as u factor measures how much heat or cold passes through the window or the door. The u factor requirements discussed above for vertical fenestration also apply to exterior glass doors.

The insulation of the best doors is in the range of u 0 10 0 20 metric. Interpolation and moderate extrapolation are. Reference table for u values u value is the coefficient of transmission i e the transmission of heat through the materials which compose the building s envelope or outer shell. The fire door rating measures how long a door can prevent the passage of flame from one side of the door assembly to the other.

Set your store to see local availability add to cart. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone. The innovative products for exterior doors include. The range is from 0 00 2 00.

All u factors for exterior doors in the table are for doors with no glazing except for the storm doors which are in addition to the main exterior door. The solar heat gain coefficient tells you how much heat from the sun is able to pass through the glass of the door or window. Feather river doors 63 5 in. Trending door styles low profile glass frames modern glass styles enclosed blinds and more.

Medina zinc fan lite unfinished smooth right hand fiberglass prehung front door with sidelites model 432105 3a1 1 014 00 1 014 00. The label shows the solar heat gain coefficient shgc and u factor for the door. The range is from 0 to 1. Even the best entry doors have relatively modest insulation levels.

U value has an inverse relationship to r value. 0 56 to 1 13 w m2k which is high compared to other doors but low compared to well insulated walls and attics with. Look for a low shgc in a climate that mainly requires cooling and a high shgc in a climate that requires heating. With the increasing interest of the minimalist design style we are adding new products that reflect clean lines and simple patterns.

It s usually expressed in units of btu hr ft2 of. Fire doors are usually rated for 20 or 90 minutes. More options available. Look for a low u factor.