When the warm air inside your house leaks out quickly, your furnace will have to work harder than normal to keep your home warm. Having walls, ceilings, and floors that are properly insulated will go a long way with keeping the hot air in, but they are not enough. Windows are one area where air tends to leak out the most, and if you ignore them, your furnace won’t be operating at optimal efficiency.
Double-Pane Windows
If your home is older and still has the original windows, chances are that they have only have one glass pane in them. Newer windows have been constructed with two glass panes that traps a gas between them. This helps improve the insulation of the windows compared to its single pane counterpart.