Efficiency Works - Residential Energy Efficiency Rebate Program (Offered by 4 Utilities)

Efficiency Works offers rebates on energy-efficient equipment like heat pumps, water heaters, windows, insulation, and ENERGY STAR appliances—some available post-purchase from any retailer, others requiring installation by a participating service provider. You must submit retail rebate applications within 45 days of purchase and retrofit applications within 45 days of project completion; a bundling bonus of $2,000 is available if you complete a heat pump upgrade and envelope measure within six months of each other. Contact the program at the provided email or visit your utility's website (Estes Park, Fort Collins, Longmont, or Loveland) to see current rebate amounts and eligibility details.

Efficiency Works values service providers who install qualified heat pumps, HVAC systems, windows, doors, insulation, and air sealing work—customers can only claim retrofit rebates if you're on the participating provider list. Ensure customers submit applications within 45 days of project completion and pre-approve rental property projects before work begins to qualify for the doubled rebate bonus; verify that combined rebates plus any bonus do not exceed the actual project cost. Familiarize yourself with current measure incentives and bundling rules, which were updated January 1, 2026.

Efficiency Works is a four-utility program (administered through Platte River Power Authority by Estes Park, Fort Collins, Longmont, and Loveland utilities) that processes both retail post-purchase rebates and retrofit rebates requiring service provider installation across heating, cooling, water heating, envelope, and appliance measures. Key mechanics include 45-day application windows post-purchase or project completion, a $2,000 bundling bonus for paired heat pump and envelope upgrades, doubled rebates for Fort Collins rental properties with pre-approval and active 12-month leases, and a companion income-qualified CARE program for low-income renters and homeowners. Water rebates were discontinued; eligible applicants should be directed to individual city websites for water conservation resources.