A 30,000-gallon rain harvest tank supplies water for irrigation, while two geothermal heat pumps provide the heating and cooling to the approximate 6,000-square-foot residence.
On display outside are a natural gas-powered Chevy Tahoe and the Chevy Volt electric hybrid.
Hours are 2 to 6 p.m. today through Friday, then 11 a.m. to 6 p.m. Saturday and Sunday. Available online or at metro-area Westlake Ace Hardware locations, tickets are $9 for adults; kids 16 and under are free when accompanied.
For more information, visit oklabuilt.com. —Gazette staff