Glass Glossary

Infrared Light


Last Updated: November 23, 2023

Infrared light is a type of electromagnetic radiation with wavelengths longer than visible light but shorter than microwave radiation. Within the infrared spectrum, which spans approximately 700 nanometers (nm) to 1 millimeter (mm), the near-infrared (NIR) sub-region (700 nm – 2500 nm) is most relevant for window and door glass considerations.

Figure: Infrared light spectrum

NIR, along with visible light, is a significant source of solar heat. NIR transmitted through windows increases interior temperatures, leading to thermal discomfort and higher cooling costs. Conversely, during colder weather, the loss of interior-generated infrared heat through windows can result in higher heating expenses.

Regulating the transmission of NIR through windows is crucial for interior comfort and energy efficiency. Cardinal’s LoĒ™ coated glass can reflect NIR while permitting visible light to pass through, helping balance interior temperatures and optimize energy usage. Controlling NIR transmission is key to maintaining a comfortable living environment and minimizing energy costs.