Flat glass can play a significant role in improving energy efficiency in buildings. The following are some ways in which flat glass can contribute to making buildings more energy-efficient:

Firstly, flat glass can be coated with a low-emissivity (low-e) coating, which reflects heat back into the building, keeping it warm in the winter and cool in the summer. This reduces the need for heating and cooling, resulting in lower energy bills and reduced carbon emissions.

Secondly, flat glass can be tinted to reduce solar gain, which is the amount of heat that enters a building through windows. This reduces the amount of energy needed to cool the building in the summer.

Thirdly, flat glass can be insulated, with two or more panes of glass separated by an insulating gas, which reduces heat loss through the windows in the winter.

Finally, flat glass can be used to create daylighting solutions, which allow natural light to enter a building, reducing the need for artificial lighting and resulting in lower energy bills.

In conclusion, flat glass can play a significant role in improving energy efficiency in buildings. By using the right type of glass and coatings, architects and builders can create buildings that are more comfortable, energy-efficient, and sustainable.