雙風琴簾能更有效保持室溫，節省能源。

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	雙風琴簾暫時不提供電動上落及特別形狀，如需要電動上落或特別形狀，可選擇風琴簾。
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		Maximum Width	Maximum Drop
	Standard	96"	120"
	Day & Night	72"	96"
	Maximum shade size dependent on fabric type, please check before ordering.
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	R-value is primarily used as a measure of comfort in winter and indicates a fabric's ability to reduce the flow of heat through it. The higher the R-value, the better its resistance to heat loss or gain.
	Shading Coefficient is important in hot weather and indicates a fabric's ability to reduce heat flow from the outside through a window shade to inside your home. A shading coefficient of 0.35 mean 65% of the heat stays outside. On a hot day, heat coming in through your windows can raise room temperature by 15-20 degrees and make your air conditioning work two to three times harder. A lower shading coefficient translates into less heat gain, more reflected heat, and lower cooling costs for you.
	Light Transmission, UV Although, not visible to the human eye, ultraviolet light from the sun can fade wood floors, carpets and furniture after prolonged exposure. UV blockage ratings measure a fabric's ability to keep these harmful rays from passing though the shade.
	Light Transmission, Visible A measure of the amount of light passing through a shade that you can see. The lower the value, the more "room darkening" the shade will be and less likely that light will pass through it.
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		R-value Single Pane	R-value Double Pane	Shading Coefficient	UV-Light Transmission	Visble Light Transmission
	Double Cell Honeycomb	2.2	3.2	0.45	1.3%	15%
	Pleated	1.4	2.4	0.7	49%	70
	Without Shade	0.9	1.9	1.0	79%	90%
	Save Energy Save Money			Source: Manufacturer's Literature

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