Discount Window and Door

Facts & Tips

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WINDOWS & DOORS
FACTS & TIPS

Solar Energy – Energy released by the sun from 3 distinct regions of the solar light spectrum

  • UV rays 3%
  • Visible Light 45%
  • Near Infrared (NIR) 52% (where the heat we experience comes from)

Fading Transmission

  • How much fading potential comes through a window
  • Light in the spectral region from 300 to 700 nanometers
  • The lower the Fading Transmission number the better the glass is for reducing fading potential for carpets and furniture

Visible Light Transmittance (VLT)

  • How much light passes through a window
  • This is the visible light that we see
  • The higher the VLT%, the more light is transferred through a window

U-Value or U-Factor

  • How much heat transfers through a window
  • The lower the U-Value, the slower the rate of heat flow, thereby better insulation performance

EGRESS

A bedroom without an exterior door will require an EGRESS complaint window
*All 4 criteria are required to pass EGRESS

STEP 01

20” minimum (net clear opening) width.

STEP 02

24” minimum (net clear opening) height.

STEP 03

Minimum Total 5.7 sqft. (net clear opening) vent space.

STEP 04

Maximum 44” sill height off finish floor.

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General Window Anatomy

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