🔥A sand heater is a cost-effective solution for heating greenhouses.
⏰The sand heater can provide heat for up to 48 to 60 hours, depending on the size of the candle used.
🌡️Copper is an excellent conductor of heat and helps distribute heat throughout the sand.
🏭The sand heater is based on the principle of thermal mass heating, where the sand holds and releases heat over time.
💡Terracotta feet can be used to elevate the sand heater to prevent damage to flammable surfaces.