Xcel Energy offers its Wisconsin residential natural gas customers rebates for high efficiency heating equipment. Currently, rebates are available for tankless and storage water heaters, furnaces, boilers, and programmable thermostats. New construction, conversions, and upgrades are all eligible for this program with the exception of boilers combined with floor and water heaters, which are available for new construction projects only. Visit the program website or contact Xcel directly for more information on this program's requirements and details.