Natural Light – With both types of screens, you can open your blinds or drapery and let the natural light in without it bringing the heat with it.If privacy is a primary concern, give strong consideration to the 90%. Visibility – The tighter weave reduces the visibility through the screen, inside looking out slightly but outside looking in significantly.Air Flow – With the tighter weave, the 90% screen restricts the air flow through the screen significantly.Some differences between the two include: Besides technical aspects, what other differences can you expect between 80% and 90%?Both the 80% and 90% screens are made with the same basic material, a woven PVC coated polyester yarn. Both reflect and absorb some solar heat and then transmits the remainder further toward or into the home.ĥ. Next, there is the window glass that takes what is transmitted through the Solar Screen and reflects, absorbs and then transmits into the home.īoth are intervening materials that reduce the Solar Heat Gain of the home. First, there is a Solar Screen that reflects, absorbs and then transmits to the window glass.
When you add solar screens (sun screens), you now have 2 levels of resistance. The image below demonstrates only one (1) intervening material – glass. The amount of solar gain increases with the strength of the sun, and decreases with the ability of any intervening material to resist the radiation. What is Solar Heat Gain? Solar Heat Gain refers to the increase in temperature in a structure that results from solar radiation.
It, also, is usually expressed as a percentage of the total sun’s energy.ģ. Transmission – this indicates how much of the sun’s energy is actually “transmitted” through the product to the window glass or into the home.It, too, is usually expressed as a percentage of the total sun’s energy. Absorption – this indicates how much of the sun’s energy is “absorbed” and held by the product.It is usually expressed as a percentage of the total sun’s energy. Reflection – this indicates how much of the sun’s energy is “reflected” away from the window glass.What terms pertaining to Heat Gain do you need to know?There are several technical terms that may be referred to by sales personnel and they assume everyone knows what they mean.
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