The unassuming boxes are at least twice as efficient as gas furnaces and can significantly cut down the carbon that your home emits. KQED Climate Reporter Laura Klivans went to Oakland to learn more. 

<p>The unassuming boxes are at least twice as efficient as gas furnaces and can significantly cut down the carbon that your home emits. KQED Climate Reporter Laura Klivans went to Oakland to learn more. </p>

KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.

<p>KQED serves the people of Northern California with a community-supported alternative to commercial media. We provide citizens with the knowledge they need to make informed decisions; convene community dialogue; bring the arts to everyone; and engage audiences to share their stories.</p>