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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 Energy.gov, 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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Space heaters are an energy efficient option for home heating, particularly in residences with fans, thermostats and timers. Space heaters allow for heating only one room, thereby avoiding the expense of heating the enti... More »

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Wood gasification boilers are the most efficient means of extracting energy from wood for residential heating, but they are considered less efficient than natural gas, propane and oil boilers. Homeowners who have access ... More »

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 »