For the past 40 years, the Community Energy Project (CEP) has helped low-income Portland homeowners make energy-saving adjustments to their homes for free. The organization has often leveraged funding from the city’s housing bureau or the Oregon Department of Energy to do targeted repairs, like upgrading a home’s thermostat or water heater to save on energy consumption. But cost limitations had kept CEP from performing energy-saving retrofits on entire homes—a service that could have a.