Northern Doctors

For heat control, start with SHGC. The other figures explain glare, brightness, reflection and UV protection.

Solar heat gain coefficient (SHGC) · 0.18

This is the share of the sun’s heat that enters through the glass, including heat absorbed by the glass and then released indoors. A value of 0.18 means about 18% enters. Lower is better for reducing solar heat gain. It describes heat through the glazing, not the temperature of the whole room.

Total solar energy rejected (TSER) · 82%

The share of the sun’s total energy kept from entering through the glazing. Higher is better for solar heat control. On the same glass, this is the other side of the SHGC figure: 82% rejected and 18% entering.

Glare reduction · 82%

The reduction in visible brightness compared with the same glass without film. This helps reduce harsh sunlight and makes screens and work areas more comfortable to use.

Visible light transmission (VLT) · 16%

The amount of visible light that passes through the filmed glass. Lower values mean a darker finish and stronger shading. This film substantially reduces brightness while retaining a view through the glass.

Exterior reflectance · 61%

The share of visible light reflected from the outside. This gives the film its reflective silver appearance. Reflection and daytime privacy depend on the light difference between indoors and outdoors.

UV blocked · More than 99%

Blocks ultraviolet radiation in the 300–380 nm range. This helps reduce UV-related fading; heat and visible light can still contribute to fading.

Solar Gard figures above are for exterior installation on 6 mm clear glass.