🪨528 lbs olivine diabase stones — direct element contact — maximum stone load — olivine diabase is a dense volcanic stone specifically selected for its thermal properties in sauna use: exceptional heat retention, resistance to the extreme thermal cycling of regular steam sessions, and a particularly soft, consistent steam output. At 528 lbs in direct contact with the heating elements, the HIVE Premium delivers more thermal mass, more sustained heat, and more abundant steam than any other electric heater in the FR33DOM range — the closest an electric heater comes to the long-duration heat quality of a traditional wood-burning kiuas
💨Built-in air tunnel — faster heat-up, longer element lifespan — the HIVE Premium's built-in air tunnel is its most significant engineering differentiator from the HIVE Mini. The tunnel channels airflow through the stone mass, improving convective heat distribution for a faster heat-up time — the stone mass reaches session temperature more quickly despite its greater size. Simultaneously, the improved airflow reduces concentrated heat build-up around the elements, extending their operational lifespan. The air tunnel makes the HIVE Premium faster to heat than its stone capacity would suggest and more durable than a conventionally ventilated heater of the same power
🎛️UKU control system — temperature, timers, delayed start, multi-language — the UKU interface provides complete session control from inside the sauna — temperature adjustment, timer management, and delayed start times for pre-heating. Multi-language options make the HIVE Premium appropriate for international commercial spa environments as well as residential installations. Intuitive enough to use while relaxing on the bench without requiring reference to a manual
🌡️Overheat protection — passive safety always active — the HIVE Premium's overheat protection monitors element temperature continuously, triggering automatic shutdown if unsafe operating temperatures are reached. A passive safety layer that operates independently of the UKU control settings — always active regardless of how the heater is programmed. Essential for commercial environments where the heater may operate unsupervised between attended sessions
🔒Child safety lock — control panel protection — the UKU control panel child lock prevents unauthorised or accidental changes to temperature and timer settings. In a commercial spa where multiple users pass through, or a family home where children have access to the sauna, the lock ensures the session environment remains exactly as configured. A standard safety provision that belongs in any professional or family sauna installation
🦵Adjustable legs — stable installation on any floor surface — the HIVE Premium's adjustable legs allow the unit to be levelled and stabilised on uneven or varied floor surfaces without shims, wedges, or floor modification. A practical installation feature that simplifies placement in older buildings, stone or tiled floors, and commercial environments where perfectly level surfaces cannot be guaranteed
🇪🇪Precision-engineered and made in Estonia — 5-year warranty — the HIVE Premium is built in Estonia to HUUM's precision manufacturing standards. The 5-year warranty (elements excluded) reflects HUUM's confidence in the structural and mechanical durability of the heater across years of commercial or residential daily use
