The HIVE Flow 9.8 kW sauna heater proudly stands out as the most efficient and environmentally friendly wood-burning sauna heater on the market. Its innovative design ensures that 75% of the heat from the firewood remains in the sauna, rather than escaping through the chimney. The large stone capacity retains heat, providing excellent steam for more than 30 minutes after the fire has extinguished. The heater’s carbon monoxide emissions are only 346 mg/m³, compared to over 1000 mg/m³ for similar heaters.   The novel design reduces fire risk, allowing for closer installation compared to traditional heaters. The robust structure of the heater features a 5 mm thick top and 3 mm thick sides, ensuring even heat distribution. The HIVE Flow weighs 67 kg (73 kg for the LS model) and accommodates 150 kg of stones, with an additional 35-40 kg of stones in the chimney cage.   The large glass door of the heater adds a cozy ambiance to the sauna, allowing you to enjoy the mesmerizing flames. The HIVE Flow meets stringent environmental standards and surpasses all known efficiency and environmental benchmarks for wood-burning heaters, ensuring a high-quality and sustainable choice for your sauna.