• Pilkington - First in Glass \
• Product Benefits \
• Thermal Insulation \
• How it works

How it works

Effectively, low-emissivity glass will reflect energy back into a building, to achieve much lower heat loss than ordinary float glass

Low-e glass reduces the heat loss of the building by:
(1) Reflecting the energy emitted by room heaters and surfaces back into the room (long wave radiation)
(2) Allowing high transmission of the solar radiation (short wave radiation) through the glass to benefit from passive solar heat gain through the glass.

During the winter, low-emissivity glass can reduce heat loss while allowing high levels of valuable free solar gain to heat buildings with no significant loss in natural light.

In the summer, however, it can become uncomfortably hot.  To maximise energy efficiency all year round, the ideal glazing solution often combines solar control and thermal insulation.