Colorado Natural Gas offers the Excess is Out Program for residential and commercial customers in Colorado. Incentives are available for purchasing and installing energy efficient furnaces, boilers, hot water heaters, programmable thermostats, and building insulation. Under this offering, home energy evaluations, insulation rebates and air sealing rebates are only available to residential customers. All equipment must meet certain energy efficiency standards listed on the program web site.  Applications must be submitted (with a copy of the receipt/invoice) within 60 days of product purchase date. Rebates apply to purchases made after January 1 of the program year and extend until funding expires. Increased incentives are available to customers who participate in Recharge Colorado, a state incentive program targeting energy efficiency. Consult Colorado Natural Gas by phone or visit the web site listed above for program specifics.