Marcus Hiles, Chairman and CEO of Western Rim Property Services and well-known Texas real estate developer has 4 pieces of advice for apartment renters and homeowners to lower their energy costs. Hiles follows his own energy saving advice when developing his homes and apartments. First, he recommends that you use newer windows that have a solar energy coefficient around 0.22 to 0.24, similar to the Cascade Low E Argon Gas Win Pro Series. Heat transfer is to blame for energy loss through windows, especially older ones. Upgrading to newer windows can help cut heat loss significantly, even up to 75 percent in some cases.