The 12, 700-square-foot Energy Star-certified house was crafted from low-toxic materials, withstood air tightness tests on the insulation, and has a water furnace geothermal system that provides hot water, radiant floor heat and air conditioning.

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The fund gives a grant for a package of energy efficiency and heating measures ranging from insulation to, in some cases, a central heating system if you do not have one at the moment.

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It also involves better insulation of battery cells and adding a new containment and venting system aimed at preventing any overheating from affecting the plane or being noticed by passengers, Boeing said.

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