Southern Minnesota Municipal Power Agency (SMMPA) is a joint-action agency which generates and sells reliable electricity at wholesale to its eighteen non-profit, municipally-owned member utilities, and develops innovative products and services to help them deliver value to customers. With help from SMMPA, Princeton PUC provides incentives for residential and commercial customers to improve the energy efficiency of homes. Rebates are available for qualified dishwashers, clothes washers, air conditioners (central and room), lighting, heat pumps (air-source and geothermal), dehumidifiers, refrigerators, and freezers. Appliances must be ENERGY STAR to qualify for the rebate, and bonus incentives are available in some cases if the old working appliance is properly recycled. Specific program details and requirements can be found on the website listed above.