HUUM
HUUM CORE Electric Sauna Heater Alder
HUUM CORE Electric Sauna Heater Alder
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Description
Description
This package pairs the HUUM CORE electric sauna heater with HUUM’s original alder cladding for all four sides, bringing the warmth of natural wood to the heater’s Nordic steel form. Designed and built in Estonia, the CORE holds 30 kg of stones for soft, generous steam, and its compact footprint suits smaller home saunas; it can also be recessed partially or fully into the sauna bench. Choose a stainless steel or black top cover and an output of 6 kW, 9 kW or 10.5 kW, heating sauna rooms from 5 to 16 m³ on a single-phase 230 V or three-phase 400 V supply. Sauna stones and the required HUUM UKU control console (UKU Local or UKU Wi-Fi) are sold separately.
Features
Technical Specification
| All models | |
| Heater type | Floor-standing electric sauna heater |
| Dimensions (H × W × D) | 830 × 385 × 385 mm |
| Width and depth with cladding fitted | 400 mm |
| Weight (heater body, excluding cladding and stones) | 15 kg |
| Stone capacity | 30 kg |
| Recommended stone size | 3–5 cm rounded natural stones |
| Minimum side safety distance (A) | 40 mm |
| Safety distance B (see diagram in product images) | 480 mm |
| Minimum clearance above heater | 1,200 mm |
| Minimum air gap beneath heater | 25 mm |
| Minimum sauna ceiling height | 2,030 mm |
| Power supply | Single-phase 230 V or three-phase 400 V |
| Control system | HUUM UKU console (UKU Local or UKU Wi-Fi), sold separately |
| Standard | EN 60335-2-53:2011 |
| Certification | UKCA |
| CORE 6 (6 kW) | |
| Heating output | 6 kW |
| Recommended sauna volume | 5–9 m³ |
| Front fuse (3N~ 400 V) | 3 × 10 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 1.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 1.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 32 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 6 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
| CORE 9 (9 kW) | |
| Heating output | 9 kW |
| Recommended sauna volume | 8–13 m³ |
| Front fuse (3N~ 400 V) | 3 × 16 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 2.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 2.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 40 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 10 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
| CORE 11 (10.5 kW) | |
| Heating output | 10.5 kW |
| Recommended sauna volume | 10–16 m³ |
| Front fuse (3N~ 400 V) | 3 × 16 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 2.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 2.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 50 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 10 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation the manufacturer recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The installation manual in the Downloads tab and local wiring regulations must be followed. The CORE accepts a single-phase 230 V or three-phase 400 V supply; when connecting to a single-phase supply, follow the separate single-phase connection note in the Downloads tab. A heat-resistant rubber-insulated cable must be used, never PVC-insulated cable, and any junction box in the sauna room must be waterproof and mounted no higher than 500 mm from the floor. Screw on the four adjustable legs and level the heater, allowing a minimum air gap of 25 mm beneath it; the heater can also be recessed partially or fully into the sauna bench provided air can move freely underneath. The minimum sauna ceiling height is 2,030 mm. When sizing the heater, add 1 m³ to the calculated room volume for every square metre of uninsulated brick, tile, glass or log wall.
Sauna stones
The CORE takes up to 30 kg of sauna stones, which are sold separately. The manufacturer specifies rounded natural stones of 3–5 cm diameter, such as olivine diabase or olivine; decorative stones should be avoided as they hold little heat and break easily. Lay the stones one by one, tightly packed between and over the heating elements so that no element remains visible: the published safety distances apply only to a correctly filled heater. Check the stones once a year and replace any broken pieces; defects caused by unsuitable stones are not covered by the warranty.
Brand
HUUM designs and manufactures its sauna heaters in Estonia, pairing age-old sauna knowledge with smart technology and modern Nordic design; its DROP heater won a Red Dot Award for product design in 2015.
Warranty
Full details are set out in HUUM’s Limited Warranty Terms and Conditions. Heating elements are excluded from the warranty, as are defects caused by unsuitable stones, and the warranty is not valid if the heater output does not correspond to the calculated volume of the sauna room.
Downloads
Delivery & Returns
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
Description
This package pairs the HUUM CORE electric sauna heater with HUUM’s original alder cladding for all four sides, bringing the warmth of natural wood to the heater’s Nordic steel form. Designed and built in Estonia, the CORE holds 30 kg of stones for soft, generous steam, and its compact footprint suits smaller home saunas; it can also be recessed partially or fully into the sauna bench. Choose a stainless steel or black top cover and an output of 6 kW, 9 kW or 10.5 kW, heating sauna rooms from 5 to 16 m³ on a single-phase 230 V or three-phase 400 V supply. Sauna stones and the required HUUM UKU control console (UKU Local or UKU Wi-Fi) are sold separately.
Features
| All models | |
| Heater type | Floor-standing electric sauna heater |
| Dimensions (H × W × D) | 830 × 385 × 385 mm |
| Width and depth with cladding fitted | 400 mm |
| Weight (heater body, excluding cladding and stones) | 15 kg |
| Stone capacity | 30 kg |
| Recommended stone size | 3–5 cm rounded natural stones |
| Minimum side safety distance (A) | 40 mm |
| Safety distance B (see diagram in product images) | 480 mm |
| Minimum clearance above heater | 1,200 mm |
| Minimum air gap beneath heater | 25 mm |
| Minimum sauna ceiling height | 2,030 mm |
| Power supply | Single-phase 230 V or three-phase 400 V |
| Control system | HUUM UKU console (UKU Local or UKU Wi-Fi), sold separately |
| Standard | EN 60335-2-53:2011 |
| Certification | UKCA |
| CORE 6 (6 kW) | |
| Heating output | 6 kW |
| Recommended sauna volume | 5–9 m³ |
| Front fuse (3N~ 400 V) | 3 × 10 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 1.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 1.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 32 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 6 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
| CORE 9 (9 kW) | |
| Heating output | 9 kW |
| Recommended sauna volume | 8–13 m³ |
| Front fuse (3N~ 400 V) | 3 × 16 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 2.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 2.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 40 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 10 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
| CORE 11 (10.5 kW) | |
| Heating output | 10.5 kW |
| Recommended sauna volume | 10–16 m³ |
| Front fuse (3N~ 400 V) | 3 × 16 A |
| Cable to UKU main module (3N~ 400 V) | 5-core 2.5 mm² SWA |
| Cable to heater (3N~ 400 V) | 5-core 2.5 mm² H07RN-F |
| Front fuse (1N~ 230 V) | 1 × 50 A |
| Cable to UKU main module (1N~ 230 V) | 3-core 10 mm² SWA |
| Cable to heater (1N~ 230 V) | 7-core 2.5 mm² SiHF |
Installation
Installation and maintenance must be carried out by a certified electrician, with the electricity supply isolated at the fuse panel before any work begins. Under IEC 60364-7-703 and BS 7671:2018 an electric sauna heater does not have to be connected through an RCD, and for reliable operation the manufacturer recommends that the heater supply is not run through one; other electrical devices in the sauna room should be RCD protected. A local point of isolation covering all live conductors is recommended. The installation manual in the Downloads tab and local wiring regulations must be followed. The CORE accepts a single-phase 230 V or three-phase 400 V supply; when connecting to a single-phase supply, follow the separate single-phase connection note in the Downloads tab. A heat-resistant rubber-insulated cable must be used, never PVC-insulated cable, and any junction box in the sauna room must be waterproof and mounted no higher than 500 mm from the floor. Screw on the four adjustable legs and level the heater, allowing a minimum air gap of 25 mm beneath it; the heater can also be recessed partially or fully into the sauna bench provided air can move freely underneath. The minimum sauna ceiling height is 2,030 mm. When sizing the heater, add 1 m³ to the calculated room volume for every square metre of uninsulated brick, tile, glass or log wall.
Sauna stones
The CORE takes up to 30 kg of sauna stones, which are sold separately. The manufacturer specifies rounded natural stones of 3–5 cm diameter, such as olivine diabase or olivine; decorative stones should be avoided as they hold little heat and break easily. Lay the stones one by one, tightly packed between and over the heating elements so that no element remains visible: the published safety distances apply only to a correctly filled heater. Check the stones once a year and replace any broken pieces; defects caused by unsuitable stones are not covered by the warranty.
Brand
HUUM designs and manufactures its sauna heaters in Estonia, pairing age-old sauna knowledge with smart technology and modern Nordic design; its DROP heater won a Red Dot Award for product design in 2015.
Warranty
Full details are set out in HUUM’s Limited Warranty Terms and Conditions. Heating elements are excluded from the warranty, as are defects caused by unsuitable stones, and the warranty is not valid if the heater output does not correspond to the calculated volume of the sauna room.
Delivery
We offer fast and reliable delivery to customers across the UK and beyond. For full details on shipping times and costs, please review our delivery policy.
Returns
We offer hassle-free returns within 30 days of purchase, so you can shop with complete confidence. For details, see our returns policy.
Warranty & Quality Promise
We are committed to delivering products of the highest quality, for details surrounding warranty please contact us.
