The Saunum Air L 15 is a 15kW floor-standing electric sauna heater for rooms from 530 to 706 cubic feet, finished in black steel. It is the top output model in the Saunum Air L series - the largest room range the Air L family covers - and shares the same patented Climate Equalizer air mixing system, Himalayan salt reservoir, and Scandinavian design language as the Air L 10 and Air L 13. This listing is the heater only. The required control unit and 198 lbs of sauna stones (6 boxes) are sold separately.
The Climate Equalizer at 15kW - the largest Air L application
In large sauna rooms from 530 to 706 cubic feet, temperature stratification is more pronounced than in smaller rooms - the vertical air column is taller, the ceiling-to-floor temperature differential is greater, and the oxygen gradient between bench levels is more significant. The Climate Equalizer's patented air mixing system is especially valuable at this scale: by drawing cooler, oxygen-rich floor air up through the heater and blending it with the hot, oxygen-depleted ceiling air, the system compresses the floor-to-ceiling temperature differential from the 20-30°F typical of a conventional large sauna room to approximately 5-8°F. In a large room with multiple bench levels, this produces a substantially more consistent bathing experience at every bench position - the upper bench is more breathable and the lower bench is warmer than in a conventionally heated room of the same size.
198 lbs of stone capacity - the largest in the Air L series
At 198 lbs, the Air L 15 carries the largest stone load of any Air L model. For a 530-706 cu ft sauna room, this stone mass provides the thermal reserve needed to heat a large room to temperature, sustain that temperature through extended sessions, recover quickly between back-to-back uses, and produce soft, long-lasting steam when water is ladled. Stones are not included in this listing - 6 boxes of the correct stone specification must be purchased separately. The Air L 15 requires the heaviest electrical installation in the Air L series: a 70A two-pole breaker and 4 AWG wire, which must be confirmed with a licensed electrician before ordering.
The top of the Air L series - 70A / 4 AWG electrical planning required
The Air L 15 is the highest-output model in the Air L range and has the heaviest electrical requirement of the three: a 70A breaker and 4 AWG wire. The Air L 10 requires 45A / 6 AWG and the Air L 13 requires 60A / 6 AWG - both use 6 AWG wire. The Air L 15 steps up to 4 AWG, which is a heavier wire specification that must be confirmed with the electrical panel's available capacity and the electrician's assessment of the wire run before ordering. For rooms from 530 to 706 cu ft where the Air L 15 and the Air L 13 both cover the room at the lower end of overlap, confirming the panel can supply 70A before choosing the 15kW is the correct planning sequence. A compatible Saunum control unit is required and sold separately at BathingBrands.
15kW floor-standing electric sauna heater with Climate Equalizer for rooms from 530 to 706 cubic feet. Black steel finish. Top output model in the Air L series. Patented air mixing technology - blends floor and ceiling air for even temperature and better breathability head to toe at all bench levels. 198 lb stone capacity - largest in the Air L series. Himalayan salt reservoir - salt ions distributed throughout the room by the air mixing system. Required: control unit and 198 lbs sauna stones - 6 boxes (both sold separately). 240V / 1-phase. 70A breaker, 4 AWG wire. UL Listed. 5-year warranty. Made in Estonia by Saunum.
15 kW 530 to 706 cu ft Top output in the Air L series Black steel finish Patented Climate Equalizer air mixing Even temperature floor to ceiling Better breathability at all bench levels 198 lb stone capacity Himalayan salt reservoir Control sold separately Stones: 198 lbs (6 boxes) sold separately 240V / 1-phase - 70A breaker - 4 AWG UL Listed 5-year warranty - made in Estonia
Specifications
Electrical
| Power output |
15 kW |
| Voltage |
240V / 1-phase / 60 Hz |
| Circuit breaker required |
70 A (standard 2-pole - no GFI/GFCI) |
| Wire gauge |
4 AWG |
| Certification |
UL Listed |
Room sizing and stones
| Room volume |
530 to 706 cu ft |
| Stone capacity |
198 lbs |
| Stones included |
No - 6 boxes sold separately |
| Control included |
No - sold separately |
Climate Equalizer and features
| Air mixing system |
Patented Climate Equalizer - floor-to-ceiling air blending |
| Temperature consistency |
Even heat head to toe across all bench levels |
| Himalayan salt reservoir |
Yes - salt ions distributed by air mixing system |
| Finish |
Black steel |
| Mounting |
Floor-standing |
| Origin |
Made in Estonia by Saunum |
Air L series comparison
| Air L 10 (Black or SS) |
10 kW | 318-424 cu ft | 45A / 6 AWG | 132 lbs stones |
| Air L 13 (Black or SS) |
13 kW | 424-565 cu ft | 60A / 6 AWG | 180 lbs stones |
| Air L 15 (this listing) |
15 kW | 530-706 cu ft | 70A / 4 AWG | 198 lbs stones |
| All models |
Climate Equalizer, Himalayan salt, black or SS finish |
Warranty
| Warranty period |
5 years |
| Finish option |
Black steel (this listing) or stainless steel |
What's included
Saunum Air L 15 sauna heater - black steel finish
Climate Equalizer air mixing unit (integrated)
Himalayan salt reservoir (integrated)
Installation and operation manual
Required (not included): Compatible Saunum control unit (sold separately); 198 lbs sauna stones - 6 boxes (sold separately). A licensed electrician is required for all electrical connections. Do not connect to a GFI/GFCI breaker.
Why the Saunum Air L 15 stands out
Top of the Air L series - 530-706 cu ft
The Air L 15 covers the largest room range in the Air L family - from 530 to 706 cubic feet. For large dedicated sauna buildings, multi-bench commercial saunas, and oversized residential installations that the Air L 13's 565 cu ft ceiling cannot serve, the 15kW is the correct and only Air L choice. At 706 cu ft it is one of the highest-output single-phase electric sauna heaters available with the Climate Equalizer technology.
Climate Equalizer - essential in large rooms
Temperature stratification is most severe in tall, large sauna rooms. The Climate Equalizer's floor-to-ceiling air mixing is most impactful precisely in the 530-706 cu ft range the Air L 15 covers: more vertical height means a larger temperature gradient to equalize, and more total air volume means the patented air mixing system's consistent oxygen distribution has a bigger effect on the bathing experience at every bench level compared to a smaller room.
198 lbs of stone - largest in the Air L series
The Air L 15's 198-lb stone capacity is the largest of any Air L model. For a 530-706 cu ft room with multiple bathers and extended session use, 198 lbs of stones provides the thermal reserve to heat the room, sustain temperature throughout the session, recover between back-to-back uses, and produce soft, consistent steam from the full stone mass when water is ladled repeatedly across a long session.
Himalayan salt reservoir - whole-room distribution
The Himalayan salt reservoir positioned within the Climate Equalizer air stream means every air circulation cycle passes fresh air through the salt spheres. In a 530-706 cu ft room, the volume of air being mixed and circulated is substantial - the salt ion distribution effect operates throughout the full large room on every cycle, delivering consistent air ionization across all bench positions rather than only near a passively placed salt panel.
Black steel - the contemporary finish for large saunas
The black steel finish suits large sauna rooms with dark interior finishes - black or dark brown timber, slate tile, concrete, or matte black hardware. The Air L 15 in black also provides visual presence proportional to its position as the largest model in the series, making it an appropriate design statement in a purpose-built sauna where the heater is a focal point of the room.
70A / 4 AWG - the heaviest Air L electrical requirement
The Air L 15 requires a 70A two-pole breaker and 4 AWG wire - heavier than the Air L 10 (45A / 6 AWG) and Air L 13 (60A / 6 AWG). Confirm panel capacity for a 70A slot before ordering. For rooms in the 530-565 cu ft overlap between Air L 13 and 15, the 60A / 6 AWG requirement of the 13kW vs the 70A / 4 AWG of the 15kW may be a deciding factor if panel capacity is the constraint.
About Saunum
Made in Estonia - UL Listed
Saunum Air L 15. 15kW. 530-706 cu ft. Patented Climate Equalizer. 198 lbs of stone. Black steel.
Saunum is an Estonian sauna company and the inventor of the Climate Equalizer - the patented air mixing technology that solves temperature stratification in sauna rooms. The Air L 15 in black steel is the highest-output model in the Air L series, for rooms from 530 to 706 cubic feet on a 70A / 4 AWG single-phase circuit. This listing is the heater only; a compatible Saunum control unit and 198 lbs of sauna stones (6 boxes) are required and sold separately. See the Saunum Air L 15 Package listing for the complete bundled purchase. We are an authorized Saunum dealer.
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15kW, 530-706 cu ft - 240V/1PH, 70A breaker, 4 AWG
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Top of the Air L series - largest output and room range
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Patented Climate Equalizer - even temperature head to toe
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198 lb stone capacity - largest in the Air L series
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Black steel finish - control + stones (198 lbs, 6 boxes) sold separately
Manuals and Documents
Warranty
5-year warranty
The Saunum Air L 15 is covered by Saunum's 5-year warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover damage caused by improper installation, use without the required stone load, incorrect stone specification, or failure to follow Saunum's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI/GFCI breaker. Proof of purchase from an authorized Saunum dealer is required for warranty claims. We are an authorized Saunum dealer.
