A unit of thermal resistance used for comparing insulating values of different material. It is basically a measure of the effectiveness of insulation in stopping heat flow. It is a measure of a material's resistance to heat flow in units of Fahrenheit degrees x hours x square feet per Btu. The higher the R-value of a material, the greater its insulating capability. A reflective material used in hot climates to block radiant heat, particularly in a building's roof.
Sunlight is a form of radiation.
A utility company sponsored conservation program whereby the utility company returns a portion of the purchase price cost when a more energy-efficient appliance is purchased. The cash incentive encourages customers to use energy more efficiently, which enables the utility to avoid building more costly power plants to operate less efficient appliances. For example, flue gases may be used for drying purposes. A design of three arrows that make up a circle. This mark tells you that you can recycle the product.