HUUM HIVE 18 Sauna Heater – 18.0kW
The HUUM HIVE 18 is a premium floor-mounted sauna heater designed for large sauna rooms from 636 to 1236 cubic feet. Built for heavy-duty use in spas, gyms, wellness centers, or larger private saunas, this model delivers powerful yet refined performance.
With a massive 550 lb (250 kg) stone capacity, the HIVE 18 produces soft, consistent heat and rich steam for larger groups. Its stainless-steel construction and professional-grade elements ensure long-lasting durability. The design allows stones to rest in direct contact with heating elements, maximizing heat efficiency. The heater can be used for both wet and dry sauna sessions.
Precision-crafted in Estonia, HUUM HIVE heaters are SGS listed for safety and reliability. The HIVE 18 is backed by a 5-year limited warranty (excluding elements).
Key Features
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18.0kW floor-mounted electric sauna heater
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Stainless steel housing and industrial-grade elements
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High stone capacity: 550 lbs (250 kg)
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Designed for commercial and large residential saunas
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Compatible with HUUM UKU controls (Local, Wi-Fi, or Glass)
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SGS listed for quality and safety
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Made in Estonia
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Limited 5-year warranty (excluding elements)
Sauna Room Compatibility
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Designed for saunas: 636 – 1236 cubic feet (18 – 35 m³)
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Compact footprint with minimalist design
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Wi-Fi control available via HUUM UKU Wi-Fi controller and mobile app
Sauna Stones
Sauna stones are not included. HUUM recommends rounded olivine diabase stones (5–10 cm) for durability, high heat capacity, and soft steam output. Decorative stones are not recommended due to breakage risks.
What’s Included
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HUUM HIVE 18 sauna heater (18.0kW)
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Adjustable legs
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Pre-installed HIVE Air Tunnel
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Installation and operation manual
Recommended Add-Ons
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HUUM UKU Control Unit (Local, Wi-Fi, or Glass)
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550 lbs of sauna stones (2–4 in / 5–10 cm)
Specifications
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Model: HIVE 18
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Power: 18.0kW
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Sauna size: 636 – 1236 cu. ft.
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Heater weight: 53.5 lbs
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Shipping weight with stones: 581.5 lbs
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Voltage: 240V, 1-phase
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Amperage: 75A
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Circuit Breaker: 50 + 50
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Wire Size: 8 + 8 AWG
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Dimensions: 22" diameter (560mm) x 29.5" height (750mm)
Model Comparison
| Model |
Power (kW) |
Sauna Size (cu. ft.) |
Amps / Circuit Breaker / Wire Size |
Safety Distance A |
Safety Distance B |
| HIVE 12 |
12 |
424 – 883 |
50 / 30+30 / 10+10 AWG |
4.73" |
31.5" |
| HIVE 15 |
15 |
530 – 1060 |
62.5 / 50+50 / 8+8 AWG |
5.9" |
33.86" |
| HIVE 18 |
18 |
636 – 1236 |
75 / 50+50 / 8+8 AWG |
7.1" |
36.22" |
