The second week f the Central Oregon Builders Association - or COBA Tour of Homes is this weekend. Spokesman Tim Knopp says they are very excited that this year will feature a "Net Zero" home: “The Net Zero house, essentially throughout the year doesn't use any power. It'll use power at certain points and then it will give back to the grid at other points. So it's pretty exciting to have that on our tour this year. It will be at Northwest Crossing. And we also have another LEED home on the tour this year as well as may affordable green-built homes." Knopp says the free tour features 39 "amazing" homes that showcase the best that builders, sub contractors and suppliers have to offer. COBA's tour of homes is this Friday through Sunday. The COBA website has more information: http://www.coba.org/