Black Hills Energy offers its residential Iowa customers incentives to encourage energy efficiency in their homes. Black Hills Energy offers a free home energy evaluation to customers (both owners and renters) to determine what energy efficiency programs would be best for them. Rebates are offered for certain ENERGY STAR appliances and thermostats; energy efficient replacement furnaces, boilers, and water heaters; and weatherization measures such as insulation upgrades and door replacements. Low-interest financing is also available for furnaces and boilers. For more details and the program applications, customers should refer to the program web site, or contact the rebate hotline at 888-567-0799.