HUUM CORE Thermo-Aspen Sauna Heater Package | Up to 10.5kW

The HUUM CORE combines industrial-grade stainless steel construction with Thermo-Aspen wood exterior panels for a finished, sauna-integrated look that doubles as burn protection. Its compact 12.2" × 12.2" footprint and minimal safety distances make it ideal for tight spaces — including complete embedding within a sauna bench. Heating elements make direct contact with the stones for rapid heat transfer and generous steam production. Available in three power ratings to accommodate sauna rooms from 177 to 566 cubic feet, and compatible with the full range of UKU controls for precise session management.

The UKU control panel is a sleek, remotely located panel compatible with heaters up to 18kW. It supports delayed start up to 48 hours, programmable temperature from 104°F to 230°F, door and temperature sensors, and connects to lights and ventilation. Optional built-in Wi-Fi adds HUUM app control with smart heating scheduling and push notifications.

Key features

• Thermo-Aspen wood exterior panels — premium appearance and burn protection
• Compact 12.2" × 12.2" footprint — minimal safety distances for flexible placement
• Can be completely embedded within a sauna bench
• Direct contact between stones and heating elements for rapid heat and generous steam
• Stainless steel industrial-quality heating elements
• 66 lb stone capacity
• Available in 6.5kW, 9kW, and 10.5kW
• 240V / single phase
• CE certified
• Designed, engineered, and made in Estonia
• 3-year limited residential warranty / 1-year commercial (excluding elements)
• UKU control — programmable 104°F–230°F, delayed start up to 48 hours, optional Wi-Fi

CORE Thermo-Aspen Heater

Brand: HUUM
Model: CORE THERMO-ASPEN
Wattage Options: 6,500W / 9,000W / 10,500W
Voltage: 240V
Phase: Single
Room Size: 177–566 cu. ft.
Stone Capacity: 66 lbs (30 kg)
Stone Size: 2"–4" (5–10 cm)
Width: 12.2" (31 cm)
Depth: 12.2" (31 cm)
Height: 32.7" (83 cm)
Minimum Ceiling Height: 80" (203 cm)
Weight: 41.9 lbs (19 kg)
Safety Listing: CE Certified
Warranty: 3-year limited residential / 1-year commercial (excluding elements)

Power Rating Guide

6.5kW: 177–318 cu. ft. — 25A — 10 AWG
9kW: 283–460 cu. ft. — 37.5A — 8 AWG
10.5kW: 354–566 cu. ft. — 43.75A — 8 AWG

Thermo-Aspen Panels

Material: Thermo-Aspen wood
Width: 15.1" (38.4 cm)
Depth: 1.1" (2.7 cm)
Height: 31.5" (80 cm)

UKU Control

Model: UKU
Temperature Range: 104°F–230°F
Width: 2.2" (5.6 cm)
Depth: 0.9" (2.3 cm)
Height: 4.1" (10.4 cm)
Warranty: 3-year limited residential / 1-year commercial

CORE Thermo-Aspen Heater

• CORE Thermo-Aspen sauna heater
• Adjustable legs (4)
• Unfinished metal shields (4)
• Cover strips (4) with fastening screws
• Thermo-Aspen wood panels (4) with fastening screws
• Installation and operation manual
• 3-year limited residential warranty

UKU Control

• UKU control panel
• Main module
• Temperature sensor and cable
• Door sensor and cable
• Control panel cable
• Installation and operation manual
• 3-year limited residential warranty

Sauna Stones

• 66 lbs of 2"–4" rounded olivine diabase sauna stones

A dedicated 240V single-phase circuit is required. Circuit breaker sizing, safety distances, and wiring requirements are detailed in the included installation and operation manual. Installation by a licensed electrician is required. The UKU control can be installed inside or outside the sauna room. Optional Wi-Fi module available at additional charge for HUUM app control. Refer to the manual for stone loading instructions — stones must be loaded to the fill line before first use.

Huum UKU Installation

Huum UKU Control

Huum Core Heater

3-year limited residential warranty / 1-year commercial warranty (excluding heating elements) on both the CORE heater and UKU control. Covers manufacturing defects in materials and workmanship under normal residential use. Does not cover heating elements under commercial warranty, damage from improper installation, misuse, or failure to follow electrical requirements. To claim: email support@marterraelements.com with your order number, photos, and a description. We aim to respond within 2–3 business days. Warranty is non-transferable and requires original proof of purchase.

Huum Warranty

Requires a scheduled delivery appointment — we will contact you prior to shipping to share delivery details and discuss any circumstances that may affect the process. Arrives on a wooden pallet encased in three-ply cardboard for solid protection. The driver is responsible for delivery only and will provide limited on-site assistance. Returns accepted within 30 days of delivery for US customers. All returns must be approved prior to sending back — contact support@marterraelements.com to initiate. Items must be unused, undamaged, in original condition, with original packaging intact. For additional details, please visit our Return & Refund page.