This Passive Energy Greenhouse Stays 50°F in Single-Digit Temps — Here's How
@The Provident Prepper·Food·3k views·1 month ago
Owner and builder walk through a 36×18 steel greenhouse using thermal mass (water totes, concrete), earth tubes, and insulation to stay 50°F in winter with no electricity
thermal-massearth-tubespassive-solaryear-round-greenhousesteel-constructioncold-climate-growing
