Paul Fraughton | Salt Lake Tribune Mitch Richardson, a home energy rater from Survey and Testing Services, seals the front door of a house and monitors the air flow testing how tightly the house is sealed. The test, performed on the house being built by Mountain Vista homes on Susan Grove Lane near 2700 S. 45 West, is an aid to the builder to make the home more energy efficient and give the home an Energy Star rating. Rocky Mountain Power is offering incentives to builders to encourage them to build homes that meet energy efficient guidelines. Wednesday, August 29, 2012 Paul Fraughton | Salt Lake Tribune Mitch Richardson, a home energy rater from Survey and Testing Services, checks for leakage along the duct system after blowing fog into a home’s duct work. Paul Fraughton | Salt Lake Tribune Billy Giblin, a quality-assurance analyst with Rocky Mountain Power’s wattsmart New Homes Program, shows a technique of framing using ladder blocking where an interior wall meets an exterior wall. Paul Fraughton | Salt Lake Tribune Two homes, one finished the other under construction,being built by Mountain Vista homes on Susan Grove Lane near 2700South 45West, are examples of energy efficient construction that will earn the homes an Energy Star rating from Rocky Mountain Power. Rocky Mountain Power is offering incentives to builders to encourage them to build homes that meet energy efficient guidelines. Wednesday, August 29, 2012 Paul Fraughton | Salt Lake Tribune Mitch Richardson, a home energy rater from Survey and Testing Services, blows fog into a home's air ducts to check for leakage along the duct system. The test, performed on the house being built by Mountain Vista homes on Susan Grove Lane near 2700 S. 45 West, is an aid to the builder to make the home more energy efficient. Rocky Mountain Power is offering incentives to builders to encourage them to build homes thatmeet energy efficient guidelines. Wednesday, August 29, 2012