August 10, 2026
Denver, CO - A Colorado District Court Judge has dismissed a corporate-backed lawsuit against Denver ordinances aimed at reducing air pollution from buildings and reducing energy bills for owners and tenants.
Clean Heat
Clean Heat
Sierra Club’s Clean Heat campaign is working towards a future where all U.S. homes and small boilers are healthy, efficient, and powered by 100% renewable electricity.
Transitioning to clean and healthy fossil fuel-free buildings and industrial facilities plays a critical role in meeting our climate goals, protecting public health, and ensuring energy is reliable and affordable.
Watch: The Benefits of Clean Upgrades in Our Homes and Businesses
Let’s Power Industry Without Pollution
A household's access to energy is essential to health, comfort and well-being. But many households suffer from a high energy burden and struggle to pay their energy bills.
Energy Burden Calculator
The Energy Burden Calculator can be used to help you estimate the percentage of your income that is spent on energy expenses (electricity and home fuels). Generally, a household energy burden over 6% is considered unaffordable.
See Your Energy BurdenEnergySage Solar Calculator
Calculate your solar savings!
In partnership with EnergySage, this solar calculator can help estimate your upfront costs, potential savings, and financing options — no commitment required.
Solar CalculatorIndustrial Boilers 101
A little-known piece of manufacturing equipment with a big pollution impact.
Find Out More
Press Releases
August 7, 2026
Yesterday, Senator Mike Lee (R-AZ) introduced a bill that would roll back existing energy efficiency standards and prevent the Department of Energy from updating existing or implementing new strong efficiency standards. The bill would result in…
July 2, 2026
San Francisco, CA – The Ninth Circuit Court of Appeals today upheld South Coast Air Quality Management District (SCAQMD) zero-emission standard for boilers and water heaters, rejecting an industry challenge to a landmark clean air…
June 30, 2026
Today, the U.S. Court of Appeals for the Second Circuit ruled in favor of New York City and New York State laws that prohibit fossil fuel-burning appliances in new buildings, affirming the judgments of two lower courts. Those laws are part of the…
June 4, 2026
Denver, CO — Today the Colorado Public Utilities Commission (PUC) declined to approve much of Xcel Energy's Gas Infrastructure Plan (GIP), which lays out the utility’s forecasted investments in methane gas infrastructure over the coming years.…