A smaller airspace doesn't insulate the building as well as a thicker airspace would. The thickest an airspace should be is 1 inch because any thicker than that will cause the glass of the window to no longer insulate the building.

The air in between the layers of glass should be thick and dense, so that it can save energy. One of the most common airs used in-between glass is argon. When argon is used heat loss is reduced. You could also use carbon dioxide or sulfur hexa-fluoride between glass.

Another type of window that is used commonly to keep the home cool is tinted glass. Tinted glass and tinted window films are used on buildings to reduce heat gain through windows. Advancements in tinted glass have now allowed us to make the glass appear just as a regular window that you can see through. The tinted glass solution is also used in many vehicles and private rooms for privacy and to keep them cool in the summer to save

Heat pumps not only provide heat in the winter, but they also provide cooling in the summer. They don't always work that well in a climate that has sub-freezing temperatures. They are also rated like central air conditioners, which means that the higher the rating the higher the energy efficiency.

There are four main types of insulation-batts, rolls, loose-fill, and rigid foam boards. All different types are made to fit in a different area of the building. Batts are made to be placed between studs in the wall. They are also placed between the rafters of your ceiling or floor. Batts are usually made with fiberglass (made from sand and recycled glass) or rock wool (made from basaltic rock and recycled material from steel). Rolls, also called blankets, are to be used in the attic floors. Rolls are most commonly made of fiberglass. Loose-fill insulation is more of a liquid form of insulation and can be blown into the attic or walls. It is made out of fiberglass, rock wool, or cellulose. Rigid foam boards are a type of insulation that isn't fluffy like usual insulation, but is hard or stiff. It is made out of various polystyrene products. The boards are light weight and provide formation support to the building.

Some common words found in the essay are:
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Approximate Word count = 3548
Approximate Pages = 14 (250 words per page double spaced)