Step 1. Measure the windows to be treated with thermal curtains. Be careful on how you convert your measurements into the fabric yard.
Step 2. Obtain the batting material and decorative fabric material. It is best if you can use recycled or sustainable material. Keep in mind that you want sturdy material that is not going to stretch or rip easily. Twill works best, while jersey is impractical.
Step 3. Wash the decorative fabric material before you fabricate your thermal curtains.
Step 4. Cut the batting material and the fabric out according to the measurements of the window, giving an allowance of 2 inches around the perimeter of the decorative fabric material. Remember, it is better to be a little over than too short.
Step 5. Pin the fabric on to the batting material so that it makes sewing easier. With the Warm Windows batting material, the fabric-side of the batting material must face the decorative-side of the fabric material. (more steps follow)
Appropriate technology (AT) is technology that is designed with special consideration to the context of its use - including environmental, ethical, cultural, social, political, and economical aspects of the community it is intended for. With these goals in mind, AT proponents claim their methods require fewer resources, are easier to maintain, and have less of an impact on the environment compared to techniques from mainstream technology, which they contend is wasteful and environmentally polluting.
The term is usually used to describe simple technologies proponents consider suitable for use in developing nations or less developed rural areas of industrialized nations. This form of "appropriate technology" usually prefers labor-intensive solutions over capital-intensive ones, although labor-saving devices are also used where this does not mean high capital or maintenance cost. In practice, appropriate technology is often something described as using the simplest level of technology that can effectively achieve the intended purpose in a particular location. In industrialized nations, the term appropriate technology takes a different meaning, often referring to engineering that takes special consideration of its social and environmental ramifications.