Low-e, dual-pane windows

Description:
We have windows on our homes to let light in and let us see out. But when it comes to efficient heating and cooling, regular windows aren’t much help. That’s because glass is a relatively poor insulator. By putting two panes of glass in a window, we create and air gap that acts as an insulator, but still lets us see through. Also, by putting special coatings on the glass, kind of like sunglasses for your windows, we can keep out the light we don’t want.

Advantage to user:
Quality windows add greatly to the value of a home. Dual-pane windows nearly eliminate condensation that can lead to mold. Special coatings on the glass greatly reduce heat and protect fabrics from UV light.

Savings to pocketbook:
Energy-efficient windows greatly reduce the cost of heating and cooling your home. The R-value means the resistance to heat flow. Single-pane glass has a very low R-value. Dual-pane window have a much better R-value. Many utilities offer rebates for replacing old single-panes with new dual-panes.

Savings to the planet:
Dual-pane, low-e windows can save 20 – 25% over single-pane, reducing CO2 and many other air pollutants depending on where your power comes from. One of the goals of “green-building” is to be net-zero. This means that the building actually produces as much power as it consumes. To do this cost-effectively, we need to make everything as energy-efficient as possible. From an energy standpoint, single-pane windows are a sinkhole.