The HUUM HIVE Wood LS 17 is a 17kW wood-burning sauna stove for rooms from 283 to 565 cubic feet with a firebox extension that allows wood to be loaded from an adjacent room or from outside the building. LS stands for the firebox extension configuration - the stove body and stone cage sit inside the sauna while the firebox opening passes through the wall to face the adjacent space. The stainless steel body is built on HUUM's core design philosophy: use as little metal as possible so that heat comes primarily from the stones rather than from metal surfaces. The result is a stove with a 287-lb stone capacity (9 boxes, sold separately) that delivers what HUUM describes as healthy, mild, and long-lasting steam - maximizing the negative ions released by stones and minimizing the positive ions associated with heated metal. The most sensitive component of the HIVE Wood - the flame tamer - is made from 5mm (0.20 in) thick stainless steel, making it exceptionally durable under sustained high-temperature use. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, giving the person tending the fire a direct view of the flames. Stones and chimney connection sold separately. 5-year limited warranty. Designed, engineered, and precision-crafted in Estonia by HUUM.
LS firebox extension - load from outside, bathe undisturbed inside
The LS in HIVE Wood LS 17 identifies the firebox extension configuration. The firebox bushing passes through the sauna wall into an adjacent room or outdoors, so wood is added and the fire is managed from outside the sauna at all times. The bathers inside the sauna are completely undisturbed - the sauna door stays closed, no heat is lost to wood loading, and the 287-lb stone mass continues radiating heat through the session without interruption. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, allowing the person tending the fire to watch the flames while the sauna is in use. HUUM notes in the installation manual that the firebox bushing must pass through a non-combustible wall (stone, concrete, or similar), with mineral wool insulation recommended around the bushing. At least 0.4 in (10mm) must be left between the bushing and the stove for air circulation.
287 lbs of stones - heat from stones, not metal
HUUM's design philosophy for the HIVE Wood is explicit and precise: HUUM heaters are built using very little metal so that the heat comes mainly from the stones and very little from the metal. This approach maximises the good negative ions released by the stones - consistent with the traditional sauna experience where stones are the primary heat source - and keeps the positive ions from heated metal surfaces at a minimum. At 287 lbs (130 kg), the HIVE Wood LS 17's stone capacity is among the largest of any residential wood-burning sauna stove in the same output class. The large number of exposed stones provides long-lasting heat retention and outstanding steam capability. The flame tamer, positioned above the fire to distribute heat into the stone mass, is made from 5mm stainless steel - robust enough to handle sustained high-heat exposure across years of regular use.
Stainless steel construction and tempered glass door
The HIVE Wood LS 17 body, firebox door frame, and flame tamer are all stainless steel - chosen for corrosion resistance, thermal durability, and the organic, modern aesthetic of the HIVE series. The tempered glass within the robust stainless steel-framed door provides both a view of the fire and safety during operation. The HIVE Wood's design is described by HUUM as bringing ancient wisdom of building sauna stoves to a new level - a reference to the stone-primary heating philosophy combined with precision stainless steel construction. The flue outlet is at the top of the stove, accepting a 115mm (4.5") chimney connection. A 6" North American adapter is required and sold separately. Maximum firewood length is 15.75" (400mm). A licensed chimney professional is recommended for all flue installations.
17kW wood-burning sauna stove with firebox extension for rooms from 283 to 565 cubic feet. HIVE Wood LS - firebox extension passes through sauna wall, wood loaded from adjacent room or outdoors. Tempered glass door faces adjacent room. Bathers inside sauna are undisturbed throughout the session. No electricity required. 287 lbs sauna stones required (9 x 33-lb boxes, sold separately). Stone-primary heat design - very little metal mass, heat comes mainly from stones. 5mm thick stainless steel flame tamer. Stainless steel body and door frame. Top flue connection - 115mm - 6" adapter required for North America (sold separately). Max firewood 15.75" (400mm). Dimensions: 21.9"W x 29.1"D x 29.5"H. Weight: 165 lbs (75 kg). Pallet delivery - scheduled freight required. 5-year limited warranty. CE certified. Designed and precision-crafted in Estonia by HUUM.
17 kW 283 to 565 cu ft HIVE Wood LS - firebox extension through sauna wall Wood loaded from adjacent room or outdoors Tempered glass door faces adjacent room Bathers inside sauna undisturbed Wood-burning - no electricity required Stone-primary heat - minimal metal mass by design 287 lbs sauna stones required (9 x 33-lb boxes) 5mm stainless steel flame tamer - durable Stainless steel body and door frame Top flue - 115mm - 6" adapter required Max firewood 15.75" (400mm) 21.9"W x 29.1"D x 29.5"H - 165 lbs Pallet delivery required 5-year limited warranty CE certified - designed in Estonia by HUUM
⚠️ 287 lbs sauna stones required (9 x 33-lb boxes, HUUM Stones 24) - not included. 6" North American flue adapter required - not included. Pallet delivery. Stones and the 6" adapter must be purchased separately. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. Mineral wool insulation is recommended around the bushing. A licensed chimney professional is recommended for all flue installations. This stove ships by scheduled pallet freight - a delivery appointment is required. At 165 lbs, plan for on-site assistance to move from the delivery point to the installation position.
ℹ️ HIVE Wood LS 17 vs HIVE Wood 17 - LS firebox extension vs standard interior firebox, same stove otherwise. HIVE Wood 17: standard interior firebox - door faces into the sauna room, wood loaded from inside. HIVE Wood LS 17 H1010012 (this listing): LS firebox extension - firebox bushing passes through the sauna wall, wood loaded from an adjacent room or outdoors, tempered glass door faces adjacent room, bathers inside undisturbed. Both share identical output (17kW), room range (283-565 cu ft), stone capacity (287 lbs, 9 x 33-lb boxes), stainless steel construction, 5mm flame tamer, 115mm top flue, and 5-year warranty. The LS configuration adds approximately 9 inches of depth for the firebox extension. Choose the HIVE Wood 17 for standard interior loading. Choose the HIVE Wood LS 17 for exterior loading convenience and an undisturbed sauna session.
Specifications
Performance
| Power output |
17 kW |
| Fuel type |
Wood - no electricity required |
| Room volume |
283 to 565 cu ft (8-16 m3) |
| Stone capacity |
287 lbs / 130 kg (9 x 33-lb boxes) - sold separately |
| Max firewood length |
15.75 in (400 mm) |
| Heat philosophy |
Stone-primary - minimal metal mass by design |
LS firebox extension
| Firebox access |
From outside the sauna room via wall bushing extension |
| Glass door faces |
Adjacent room - fire view from outside sauna |
| Wall requirement |
Non-combustible wall (stone or concrete) required |
| Insulation requirement |
Mineral wool around bushing recommended |
| Air gap requirement |
Min. 0.4 in (10 mm) between bushing and stove |
Flue and installation
| Flue connection diameter |
115mm (4.5") - top connection only |
| North American adapter |
6" (155mm) adapter required - sold separately |
| Delivery |
Scheduled pallet freight - appointment required |
Physical dimensions
| Width |
21.9 in (555 mm) |
| Depth (with LS extension) |
29.1 in (740 mm) |
| Height |
29.5 in (750 mm) |
| Weight |
165 lbs (75 kg) |
Construction
| Body material |
Stainless steel |
| Door frame |
Stainless steel |
| Door glass |
Tempered glass |
| Flame tamer |
0.20 in (5 mm) thick stainless steel - exceptionally durable |
| Design philosophy |
Minimal metal mass - heat from stones not metal |
| Installation |
Floor-mounted, vertical orientation |
| Use environment |
Interior - wet area |
Certifications and warranty
| Certifications |
CE certified |
| Origin |
Designed and precision-crafted in Estonia by HUUM |
| Warranty |
5-year limited warranty |
Optional accessories (sold separately)
| Protective cage |
HUUM Cage HSTV |
| Chimney - thru-ceiling |
HUUM Thru-Ceiling Chimney Kit |
| Chimney - thru-wall |
HUUM Thru-Wall Chimney Kit |
| Chimney - barrel |
HUUM Barrel Chimney Kit |
| Water heater |
HUUM WaterEx |
| North American flue adapter |
6" (155mm) adapter - sold separately |
What's included
HUUM HIVE Wood LS 17 wood-burning sauna stove with firebox extension
Stainless steel-framed tempered glass door
5mm stainless steel flame tamer
Installation and operation manual
5-year limited warranty
Required (not included): 287 lbs sauna stones (9 x 33-lb boxes, HUUM Stones 24 recommended); 6" North American flue adapter; chimney connection. Optional accessories (sold separately): HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM WaterEx. A licensed chimney professional is recommended for all flue installations. The LS firebox bushing requires a non-combustible wall.
Why the HUUM HIVE Wood LS 17 stands out
Stone-primary heat - minimal metal, maximum negative ions
HUUM's design philosophy for the HIVE Wood is built into the structure itself: the stove uses as little metal as possible so that heat comes primarily from the stones and very little from the metal surfaces. This directly implements the traditional sauna logic where stones are the heat source and metal is only the structure. HUUM states the goal explicitly: maximize the good negative ions from the stones, as in traditional saunas, and keep the positive ions from the metal at a minimum. Together with the 287-lb stone capacity, this approach delivers what HUUM describes as healthy, mild, and long-lasting steam - the defining quality difference that separates the HIVE Wood from heaters where metal surfaces account for a significant portion of the radiant heat.
Firebox extension - load from outside, sauna stays closed
The LS firebox extension allows wood to be added from an adjacent room or outdoors without opening the sauna door. For the bathers inside, the session continues without interruption - no heat loss, no draft, no intrusion. The tempered glass door faces the adjacent room in the LS configuration, so the person tending the fire has a direct view of the flames throughout. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. For a cabin sauna with an adjoining relaxation area or a sauna building where the fire is managed from outdoors, the HIVE Wood LS 17 is built for exactly this installation type.
287 lbs of stones - long-lasting heat and outstanding steam
At 287 lbs (130 kg), the HIVE Wood LS 17 stone capacity is substantial - HUUM describes the result directly: long-lasting heat retention and outstanding steam capability. The large exposed stone surface above the flame tamer accumulates heat throughout the fire and holds it in the stone mass long after the fire has burned down. For a sauna session where the fire cannot be constantly tended from inside - which is the entire point of the LS configuration - the stone thermal mass is what sustains the session. Nine boxes of 33-lb sauna stones (HUUM Stones 24 recommended) fill the stone cavity to the required minimum.
5mm stainless steel flame tamer - exceptionally durable
The flame tamer is the component of a wood-burning sauna stove most exposed to direct flame contact over sustained high-temperature use. HUUM built the HIVE Wood's flame tamer from 5mm (0.20 in) thick stainless steel specifically because it is the most sensitive component of the stove. HUUM describes this directly: the flame tamer is made of 0.20 in / 5 mm thick stainless steel and is therefore exceptionally durable. This thickness is significantly more robust than typical flame tamer construction and is a key long-term durability advantage of the HIVE Wood platform. The 5-year limited warranty reflects HUUM's confidence in the overall build quality of which the flame tamer is the most demanding component.
Organic stainless steel design - designed in Estonia
The HIVE Wood LS 17 combines the organic hexagonal aesthetic of the HUUM HIVE design language with all-stainless steel construction. The stainless steel body, door frame, and flame tamer resist corrosion and heat discolouration across years of regular use. The tempered glass door provides a clear view of the fire from the adjacent room in the LS configuration. HUUM describes the HIVE Wood as bringing ancient wisdom of building sauna stoves to a new level - a precise summary of their stone-primary, low-metal-mass design approach applied to precision stainless steel construction. Designed, engineered, and precision-crafted in Estonia. We are an authorized HUUM dealer.
HIVE Wood Series - 13kW and 17kW configurations
The H1010012 is the 17kW LS (firebox extension) configuration of the HIVE Wood Series. The same HIVE Wood platform is available as: HIVE Wood 13 (13kW, 212-459 cu ft, 199 lbs stones / 6 x 33-lb boxes, standard interior firebox), HIVE Wood 17 (17kW, 283-565 cu ft, 287 lbs stones, standard interior firebox), and HIVE Wood LS 17 (this listing, 17kW, 283-565 cu ft, 287 lbs stones, LS firebox extension for exterior loading). All HIVE Wood stoves share the same stone-primary design philosophy, 5mm stainless steel flame tamer, stainless steel construction, 115mm top flue connection, and 5-year limited warranty. HUUM also offers the HIVE Electric and DROP Electric heater lines for electric sauna heating. We are an authorized HUUM dealer.
About HUUM
Designed in Estonia - CE Certified - HIVE Wood Series - LS Firebox Extension
HUUM HIVE Wood LS 17. 17kW. 283-565 cu ft. 287 lbs of stones. Stone-primary heat. Exterior loading.
HUUM is an Estonian sauna heater company built on the principle that heat should come from stones, not metal. The HIVE Wood LS 17 is a 17kW wood-burning sauna stove with firebox extension for loading from an adjacent room or outdoors - 287 lbs of stones, 5mm stainless steel flame tamer, stainless steel body and door frame, and tempered glass door facing the adjacent room. Sauna stones (9 x 33-lb boxes), chimney connection, and 6" flue adapter are required and sold separately. Pallet delivery. We are an authorized HUUM dealer.
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17kW wood-burning - 283-565 cu ft - no electricity required
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LS firebox extension - wood loaded from adjacent room - tempered glass door faces outside
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287 lbs sauna stones required (9 x 33-lb boxes) - stone-primary heat design
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5mm stainless steel flame tamer - stainless steel body and door frame
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115mm top flue - 6" adapter required - pallet delivery - 5-year warranty
HIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - HIVE Wood Series selection guide
HIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - choosing the right HIVE Wood configuration
Three HIVE Wood configurations serve different room sizes and loading preferences. HIVE Wood 13: 13kW, 212-459 cu ft (6-13 m3), 199 lbs stones (6 x 33-lb boxes), standard interior firebox. Right for medium sauna rooms where interior wood loading is acceptable and 13kW is adequate output. HIVE Wood 17: 17kW, 283-565 cu ft (8-16 m3), 287 lbs stones (9 x 33-lb boxes), standard interior firebox. Right for the 283-565 cu ft range where interior loading is acceptable and 17kW with 287 lbs of stones is the correct specification. HIVE Wood LS 17 H1010012 (this listing): 17kW, 283-565 cu ft, 287 lbs stones (9 x 33-lb boxes), LS firebox extension. Identical output and stone capacity to the HIVE Wood 17 with the addition of the firebox extension for loading from outside the sauna. Right when exterior loading convenience and undisturbed sauna sessions are priorities and the wall between the sauna and adjacent space is non-combustible (stone or concrete). All three share the same stone-primary heat design, 5mm stainless steel flame tamer, stainless steel body, 115mm top flue, and 5-year warranty.
Manuals and Documents
Warranty
5-year limited warranty
The HUUM HIVE Wood LS 17 carries HUUM's 5-year limited warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines in the manual, use of incorrect or uncertified sauna stones, operating without the required stone load, chimney-related damage from inadequate maintenance, or improper preparation of the LS firebox wall penetration (non-combustible wall required). A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.
