Nanotextured Surface Dramatically Improve Solar Cell Efficiency. The Engineer posted on January 22, 2015 | | 4074 views. Reducing the amount of sunlight that bounces off the surface of solar cells helps maximize the conversion of the sun's rays to electricity, so manufacturers use coatings to cut down on reflections.
The main entry door must conform to IRC specifications. Exterior doors often are the most visible parts of a house and like interior doors, are available in standard sizes. They range in width from 2 feet to more than 3 feet, and in height from 6 feet, 8 inches to more than 8 feet. Standard thickness is 1 3/4 inches.
The chart below lists these sizes, but I should point out that not all styles of doors are made in this full range of sizes. Internal doors come in two thickness 35 and 40 millimeters, 35 millimeters being the most widely used. Internal Fire Doors are 44 millimeters. Internal doors are usually much lighter than external doors, this is because of their thickness and the material and method used in their construction.