One of the most expensive building costs is the mechanical system used for heating and cooling the building. This applies to the cost of the system itself along with the cost of running and maintaining it. One way to lessen these costs is by using smart design and incorporating low tech louver systems to help regulate the amount of heat gain in the summer and take advantage of the sun in the winter. Here, in part 4 of the series you'll learn about different ways to achieve these results.
