As of 2015, boilers offer the most cost-effective heating for most homes. People in warmer regions or small homes, however, may find the upfront cost to be too high. More »

Monolithic dome homes are more energy efficient than traditional homes; this is due to their structural makeup. Dome homes are built with concrete on both the exterior and interior walls, and concrete aids insulation. More »

Baseboard heating falls into the category of electric resistance heating, according to, and is far less energy efficient than heat that is generated by combustion. If electric heat is the only option in a home... More »

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Bosch Greenstar condensing boilers are ENERGY STAR-certified as energy efficient. As of 2015, eight Greenstar models were certified. Certified products have passed third-party testing at laboratories approved by the U.S.... More »