HUUM CORE Aspen CORE Series Sauna Heater, Aspen Wood Exterior, Up to 10.5kW
The HUUM CORE Aspen is a floor-standing electric sauna heater with an aspen wood exterior cladding, available up to 10.5kW. This listing is the heater only. A compatible UKU control unit and sauna stones are sold separately. The CORE Aspen is the lightest-toned natural wood option in the CORE series - aspen is a Nordic softwood with a very pale, almost white grain that makes it the most visually light of the four CORE exterior finishes. For sauna rooms designed around the bright, minimalist aesthetic of traditional Nordic bathing culture - pale birch, whitewashed surfaces, or bright natural wood - the CORE Aspen delivers a heater exterior that reads as a natural, unobtrusive part of the room rather than a contrasting element. The CORE Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a complete single purchase.
The CORE design - open basket, wood and stone in one form
The HUUM CORE heater combines an open stainless steel stone basket with natural wood panels on the exterior sides, creating a heater that presents both the warmth of natural wood and the honest texture of the sauna stones simultaneously from within a single unit. The open basket allows stones to be visible through the structure on all sides, and the wood exterior panels frame the stone mass in natural timber. Water ladled onto the stones produces soft, consistent steam from stones at multiple temperature levels throughout the basket depth, and the open structure allows heat and steam to radiate from the full stone surface area rather than only from an exposed top. The aspen wood panels of the CORE Aspen provide the lightest possible wood cladding tone - suitable for bright contemporary saunas where the traditional aesthetic is maintained but the material palette is kept pale and clean.
Aspen wood - the palest CORE exterior
Among the natural wood options in the CORE series, aspen has the lightest tone. Natural aspen is a soft, fine-grained Nordic wood with a pale cream-to-white surface that brightens with age rather than darkening. In a sauna room with light birch, spruce, or pale pine, aspen cladding on the heater is nearly invisible as a separate material - it reads as a continuation of the wall and bench timber rather than a distinct heater body. For sauna rooms where the interior palette is deliberately light and the heater should integrate as seamlessly as possible with the surrounding wood surfaces, the CORE Aspen is the correct choice. Where thermo-aspen is the thermally darkened version of the same wood species - deep brown and rich - natural aspen is the unmodified, lightest expression of the same timber.
UKU compatible - control sold separately
The CORE Aspen is compatible with both UKU Local Black (on-site digital control) and UKU WiFi (HUUM app remote preheat, scheduling, and monitoring on iOS and Android). Both control variants are sold separately at BathingBrands. The specific output level selected for the CORE determines the room coverage, electrical requirements, and whether a UKU Extension Box is required. Confirm the output level and corresponding electrical and extension box specifications before ordering. A licensed electrician is required for all electrical connections. Do not connect to a GFI/GFCI breaker.
Floor-standing electric sauna heater with aspen wood exterior cladding. Up to 10.5kW. Open stainless steel stone basket with natural aspen wood side panels. The lightest CORE exterior - pale cream-to-white Nordic aspen grain. Suits light birch, spruce, or pale pine sauna interiors where minimal contrast is the design goal. Control (UKU Local Black or WiFi) and sauna stones sold separately. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See CORE Aspen Package listing for complete bundled purchase.
Up to 10.5 kW Aspen wood exterior - palest CORE finish Pale cream-to-white Nordic aspen grain Open stainless steel stone basket Floor-standing UKU control sold separately Stones sold separately CORE Aspen Package available - bundled purchase SGS Listed 5-year warranty (elements excluded) Made in Estonia by HUUM
Specifications
Electrical
| Maximum output |
Up to 10.5 kW |
| Voltage |
240V / 1-phase or 3-phase |
| Control included |
No - UKU Local Black or WiFi sold separately |
| Certification |
SGS Listed |
Stones and room sizing
| Stones included |
No - sold separately |
| Stone specification |
See Stone Requirements document below |
| Room coverage |
Determined by output level selected |
Design
| Exterior cladding |
Natural aspen wood panels |
| Tone |
Pale cream-to-white - lightest CORE exterior |
| Stone basket |
Open stainless steel - stones visible on all sides |
| Mounting |
Floor-standing |
| Origin |
Made in Estonia by HUUM |
CORE wood exterior options
| CORE Black |
Painted black finish - darkest |
| CORE Thermo-Aspen |
Deep rich brown - thermally modified aspen |
| CORE Alder |
Pale warm neutral - natural alder |
| CORE Aspen (this listing) |
Pale cream-to-white - lightest, natural aspen |
| All variants |
Same stainless basket, open design, up to 10.5kW |
Warranty
| Warranty period |
5 years (elements excluded) |
| SKU |
CORE6-ASP-BK |
What's included
HUUM CORE Aspen floor-standing sauna heater with natural aspen wood exterior cladding
Installation and operation manual
Required (not included): UKU control unit (Local Black or WiFi, sold separately at BathingBrands); sauna stones (sold separately - see Stone Requirements document). A UKU Extension Box may also be required depending on the output level selected. A licensed electrician is required. Do not connect to a GFI/GFCI breaker.
Why the HUUM CORE Aspen stands out
The palest CORE exterior - natural aspen
Natural aspen is the lightest-toned wood in the CORE series - a pale cream-to-white Nordic softwood that integrates with light birch, spruce, and pale pine sauna interiors without adding colour contrast. For sauna rooms built around a bright, minimal Nordic aesthetic where every material is kept light and the heater should read as part of the wood interior rather than a separate element, the CORE Aspen is the appropriate choice.
Aspen vs Thermo-Aspen - same wood, opposite tones
Natural aspen (this listing) and thermo-aspen are the same wood species at opposite ends of the colour spectrum. Natural aspen is pale cream-to-white - unmodified, light, and bright. Thermo-aspen is deep rich brown - the same aspen wood thermally modified at high temperature to produce a dramatic colour transformation. The shared species name can cause confusion; the tones could not be more different.
Open basket - wood and stone visible together
The CORE's open stainless steel basket allows the full stone load to be visible through the structure on all sides, with the aspen wood panels framing the stone mass in pale natural timber. The visual combination of pale aspen exterior and visible stone interior creates a heater that presents the fundamental materials of a traditional sauna - wood and stone - as its visible face.
Up to 10.5kW output range
The CORE Aspen is available up to 10.5kW, covering a wide range of sauna room sizes. The output level selected determines room coverage, electrical specification, and extension box requirements. Confirm the correct output configuration for the specific sauna room before ordering and reference the Size Your Sauna document below for guidance.
CORE Aspen Package - complete bundled option
The CORE Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a single complete purchase. This standalone listing is for buyers sourcing the heater separately - replacing a heater in an existing CORE installation, pairing with a control already on hand, or completing a multi-component order in separate transactions.
SGS Listed - 5-year warranty - made in Estonia
The HUUM CORE Aspen is SGS Listed for safety compliance and manufactured in Estonia by HUUM. The 5-year limited warranty covers defects in manufacturing and materials under normal use conditions, with heating elements carrying their own separate warranty period. Proof of purchase from an authorized HUUM dealer is required for warranty claims.
About HUUM
Made in Estonia - SGS Listed
HUUM CORE Aspen. Up to 10.5kW. Natural aspen wood exterior. Palest CORE finish. Open stone basket.
HUUM is an Estonian sauna heater company. The CORE Aspen is HUUM's floor-standing heater with natural aspen wood exterior cladding - the lightest-toned exterior in the CORE series, with pale cream-to-white aspen panels framing an open stainless steel stone basket. This listing is the heater only. UKU control (Local Black or WiFi) and sauna stones are required and sold separately at BathingBrands. See the CORE Aspen Package for a complete bundled purchase. We are an authorized HUUM dealer.
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Natural aspen wood exterior - pale cream-to-white, lightest CORE finish
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Open stainless steel stone basket - stones visible all sides
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Up to 10.5kW - multiple output configurations available
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UKU Local Black or WiFi compatible - both sold separately
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Stones sold separately - CORE Aspen Package also available
Manuals and Documents
Warranty
5-year limited warranty (elements excluded)
The HUUM CORE Aspen is covered by HUUM's 5-year limited warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM'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 HUUM dealer is required. We are an authorized HUUM dealer.
