utter bullshit right on track, DP, common sense applications are difference makers ...when I took over facility operations at a medical school in SF, had a 60,000 sq' two story building on campus, and thanks to a minimally insulated 30,000 sq' black tar and gravel roof that was an absolute heat sink, even with the the a/c system (2- 500 ton Carrier Chillers) running full throttle the second floor would never get under 80 degrees mid day during a heat wave. The solution was simple. I had a contractor spray the entire roof with a silver reflective roofing emulsion, and from that point on we could keep the entire building at 72 degrees with the chillers running at cruise speeds instead of all out. Built a house alongside the Deschutes River in Oregon with a free standing corner gas fireplace that had a stainless exhaust pipe running up and through the roof. Had the heating contractor install the return air vent for the central heating system in the decorative river rock surround behind the fireplace, half way up the wall. With the fireplace running, would turn on just the fan switch to the central heating system, and the return would slowly pull air from the great room across the stainless pipe, heating it, and then distribute to all the other rooms in our home, keeping them comfortably warm mid winter without having to turn on the furnace itself. Heating contractor liked it so much, he began pushing it to other new customers. Point being that a little common sense and imagination can lead to low cost ways to reduce energy consumption.