Garage Door Industry Officially Replaces R-Value with U-Factor

Why U?

For a multitude of reasons, the garage door industry has officially replaced R-Value with U-Factor as the standard measurement of thermal performance. Below are some links for further explanation, but here is a summary:

  • R-Value is the measurement of energy efficiency in one area of a garage door section, typically from the thickest point. It does not account for around the perimeter or between the door’s section joints.
  • U-Factor is the measurement of energy efficiency of the entire installed unit. Every area of the attached door is accounted for.

(Sources: DASMA Announcement, DASMA Technical Data Sheet #163)

What is U-Factor Exactly?

U-Factor measures how well a product can keep heat from escaping from the inside of a room. The lower the number, the better a product is at keeping heat in.

(Source: National Fenestration Rating Counsel®

What is Considered a “Good” U-Factor?

Most well insulated double-pane windows, that go in your living room, range from 0.15 – 0.30. You can see (and feel) this range by looking at the popular Pella® Impervia® line of windows and patio doors.

(Pella® Impervia®

What is the Range of U-Factors in Renner’s DELDEN® Door Collections?

Door Collection U-Factor
Delvation™ / Vintage 200 0.32
Delvation™ / Vintage 300 0.27
Delvation™ / Vintage 400 0.23
Delvation™ / Vintage 500 0.24
Delvation™ / Vintage 600 0.19* True White Flush, Short and Bead Board
Prestige 2000 0.43
Delcraft 200 0.26
Amarr® Classica® 2000 0.32
Amarr® Classica® 3000 0.22

DELDEN® Garage Doors, Good for Your Living Room!