5 DIY Sand Battery Space Heaters! with Heating Elements! 300F/150C (self-regulating Ceramic PTC) 12v
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5 DIY Sand Battery Air Heaters! with heating elements! all models heat up quickly and radiate heat for hours. simple to make. made with steel food cans, sand...
  • Dickey_Butts [none/use name]
    ·
    6 months ago

    I think most people use them for greenhouses and the like. Definitely not practical for bigger spaces.