
The author presents the concept of passive houses as an energy-efficient and sustainable alternative to traditional homes, emphasizing their ability to maintain comfortable temperatures without a furnace.


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With extra insulation and lots of sun, a passive house in the town of Hope is able to maintain an indoor temperature of around 70 degrees without the use of a furnace.

This Maine home can stay 70 degrees without a furnace, even when it's freezing outside

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Maine Passive House: Efficient Heating Without Furnace
