Specialized design strategies are essential for passive solar greenhouses in cold climates to maximize efficiency and sustainability. We’re looking for robust insulation, particularly on the non-sun-facing sides, and the use of high-quality glazing materials that allow for maximum light penetration while minimizing heat loss. We should also highlight the necessity of incorporating thermal mass, like water barrels or dense materials, to store heat during the day that can be released at night, maintaining a steady temperature within the greenhouse.
Orientation is also critical, we recommend a south-facing orientation in the Northern Hemisphere to capture the low-angled winter sunlight. We suggest perimeter and foundation insulation to prevent ground-heat loss, and the strategic use of ventilation to manage humidity and temperature. Additionally, we advise the use of energy curtains for retaining heat during the coldest times and creating microclimates inside the greenhouse to protect the most sensitive plants, further extending the growing season in frigid conditions.
