Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Includes

What Is Included

12 KW

Included with purchase

12.0 kW sauna heater adjustable legs pre-installed hive air tunnel installation and operation manual.

Required separately

UKU control, UKU extension box, 528 lb stones (quantity 16 × 33 lb. 2 to 4 in stones boxes).

15 KW

Included with purchase

15.0 kW sauna heater adjustable legs pre-installed hive air tunnel installation and operation manual.

Required separately

UKU control, UKU extension box, 528 lb stones (quantity 16 × 33 lb. 2 to 4 in stones boxes).

18 KW

Included with purchase

18.0 kW sauna heater adjustable legs pre-installed hive air tunnel installation and operation manual.

Required separately

UKU control, UKU extension box, 528 lb stones (quantity 16 × 33 lb. 2 to 4 in stones boxes).

Contents vary by configuration. Check the row for the option selected above.

Technical Specifications

Model & Application

Model & Application
Brand	HUUM
Catalog Product	HUUM HIVE Electric Sauna Heater with Included Air Tunnel \| 12, 15 & 18 kW
Heater Type	Electric sauna heater
Model Number	12 kW / 240 V / 1 phase: HIVE 12; 15 kW / 240 V / 1 phase: HIVE 15; 18 kW / 240 V / 1 phase: HIVE 18
SKU / Part Number	12 kW / 240 V / 1 phase: H1003012; 15 kW / 240 V / 1 phase: H1003022; 18 kW / 240 V / 1 phase: H1003032

Sauna Sizing

Sauna Sizing
Maximum Room Volume	12 kW / 240 V / 1 phase: 636 ft³; 15 kW / 240 V / 1 phase: 813 ft³; 18 kW / 240 V / 1 phase: 989 ft³
Minimum Room Volume	12 kW / 240 V / 1 phase: 424 ft³; 15 kW / 240 V / 1 phase: 530 ft³; 18 kW / 240 V / 1 phase: 636 ft³

Electrical

Electrical
Phase	1 phase
Rated Current	12 kW / 240 V / 1 phase: 50 A; 15 kW / 240 V / 1 phase: 62.5 A; 18 kW / 240 V / 1 phase: 75 A
Rated Power	12 kW / 240 V / 1 phase: 12 kW; 15 kW / 240 V / 1 phase: 15 kW; 18 kW / 240 V / 1 phase: 18 kW
Supply Voltage	240 V

Dimensions & Weight

Dimensions & Weight
Assembled Dimensions	22"D x 29.5"H
Heater Diameter	22.05 in
Heater Height	29.53 in
Minimum Host-Room Height	76.77 in
Product Weight	12 kW / 240 V / 1 phase: 49.1 lbs; 15 kW / 240 V / 1 phase: 51.3 lbs; 18 kW / 240 V / 1 phase: 53.5 lbs

Installation Clearances

Installation Clearances
Ceiling-Clearance Reference Height Above Finished Floor	29.53 in
Ceiling-Clearance Reference Plane	Top Of Rocks
Combustible Radial Clearance	12 kW / 240 V / 1 phase: 4.72 in; 15 kW / 240 V / 1 phase: 5.91 in; 18 kW / 240 V / 1 phase: 7.09 in
Minimum Installation Envelope Width	12 kW / 240 V / 1 phase: 31.5 in; 15 kW / 240 V / 1 phase: 33.86 in; 18 kW / 240 V / 1 phase: 36.22 in
Minimum Spacing from Adjacent Surfaces	12 kW / 240 V / 1 phase: 4.72 in; 15 kW / 240 V / 1 phase: 5.91 in; 18 kW / 240 V / 1 phase: 7.09 in
Top of Rocks Above Finished Floor	29.53 in

Included & Required

Included & Required
Included Components	12 kW / 240 V / 1 phase: 12.0kW Sauna Heater Adjustable Legs Pre-Installed HIVE Air Tunnel Installation and Operation Manual 5-Year Limited Warranty (excluding elements); 15 kW / 240 V / 1 phase: 15.0kW Sauna Heater Adjustable Legs Pre-Installed HIVE Air Tunnel Installation and Operation Manual 5-Year Limited Warranty (excluding elements); 18 kW / 240 V / 1 phase: 18.0kW Sauna Heater Adjustable Legs Pre-Installed HIVE Air Tunnel Installation and Operation Manual 5-Year Limited Warranty (excluding elements)
Required, Not Included	UKU Control, UKU Extension Box, 528 lbs stones (Qty 16 x 33 lbs. 2 to 4 in stones boxes)

Certifications

Certifications
Certifications & Listings	CE, IPX4, SGS

Warranty

Warranty
Residential Warranty	3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

Use the attached current manual and a qualified installer for final sizing, wiring, clearances, venting, and local-code compliance.

How It Fits

How This Product Fits the System

What it is used for

An electric sauna heater that heats the sauna room and stone mass for traditional löyly. Choose the output from adjusted room volume, then match the exact voltage, phase, circuit, controls, stones, clearances, and ventilation.

What to plan

Size from adjusted sauna volume, including the effect of glass, masonry, and other uninsulated surfaces; do not size from floor area alone.
Match the selected model's power or fuel, voltage, phase, circuit, wire, control, stone, and venting requirements before ordering.
Treat clearances, ceiling reference planes, ventilation, guarding, floor protection, and service access as one room-layout decision.
Follow the current installation manual and use a qualified installer.

Required separately

Complete the system with these items.

HUUM UKU Sauna Control | Local & Wi-Fi Packages Required for operation; match the version and quantity to this selection.
HUUM Stones 24 | Rounded 2 to 4-Inch Sauna Stones, 33 lb (With Heater Purchase Only) Required for operation; match the version and quantity to this selection.
HUUM UKU Extension Box Required for operation; match the version and quantity to this selection.

Designed to work with

Model-specific replacements and compatible system components.

HUUM 75-Foot UKU Extension Cables | Control & Sensor Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Panel Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU-TEMP-SNSR Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Wi-Fi Main Module | SP0030 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Door Sensor | SP0032 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Control Panel Cable | 33 ft, SP0035 Designed for the same heater or control system; confirm compatibility with the selected model.
HUUM UKU Surface Mounting Frame | UKU Glass, Mirror and Gold Designed for the same heater or control system; confirm compatibility with the selected model.

Optional accessories

Optional upgrades and accessories.

HUUM HIVE Reflector | HIVE & HIVE Mini Optional accessory; confirm model compatibility and room layout before adding it.
HUUM HIVE Safety Rail | Rail H & Rail HM Optional accessory; confirm model compatibility and room layout before adding it.
HUUM Flange H | HIVE Embedding Flange Optional accessory; confirm model compatibility and room layout before adding it.

Sauna packages that offer this heater

Available heater options for these sauna packages.

Auroom Natura Outdoor Modern Sauna with Changing Room Available with this sauna package; confirm the current selection and installation requirements.

Other heater options

Compare these options; sizing, power, controls, clearances, and stones may differ.

Harvia Linear 16 A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.
Homecraft Apex Commercial-Grade Electric Sauna Heater | 10, 12, 15 and 18 kW A related heater option, not an interchangeable replacement; re-check sizing, power, controls, clearances, and stones.

Attachments

Hardware-Specific US/CA Manual - HUUM UKU 4.2 - v1

Official HUUM US/Canada UKU 4.2 installation and operation manual. Use only after the supplied or installed hardware is verified as UKU 4.2; a controller package name or commerce SKU does not establish its hardware generation.

View PDF Download

Hardware-Specific US/CA Manual - HUUM UKU 4.1 - H200402L03 v9 / content v4

Official HUUM US/Canada UKU 4.1 installation and operation manual. Use only after the supplied or installed hardware is verified as UKU 4.1; a controller package name or commerce SKU does not establish its hardware generation.

View PDF Download

Current US Manual - HUUM HIVE / HIVE Mini - H1002L03 v13 / content v3

Current official HUUM US installation and operation manual, verified by Sauna Marketplace on 2026-08-08. Applies to full-size HIVE 12, 15, and 18 as well as HIVE Mini models listed in the manual.

View PDF Download

Current HUUM Limited Warranty Terms - v4

Current official HUUM limited warranty terms linked from HUUM's U.S. warranty page and verified by Sauna Marketplace on 2026-08-08.

View PDF Download

HUUM Heating Element Requirements - distributor guide, 2025-12

Current Bathing Brands HUUM replacement-element matrix. HIVE Mini 6 uses three SP0008 2.0 kW elements; HIVE Mini 9 uses three SP0009 3.0 kW elements; HIVE Mini 11 uses three SP0010 3.5 kW elements.

View PDF Download

HUUM Heater and Stone Requirements - distributor guide, 2025-12

Current Bathing Brands HUUM stone matrix. HIVE Mini requires 330 to 331 lb of 2 to 4-inch Stones 24, supplied as ten 33-lb boxes.

View PDF Download

Certificate of Compliance

View PDF Download

HUUM HIVE DWG CAD/AutoCad

View PDF Download

Gallery

Click Image, Then Scroll! For the best experience, click on any image then swipe or use arrow keys to browse.

Fast, Free Shipping

Most HUUM HIVE orders leave the warehouse within 3 business days. Due to weight and size, the HUUM HIVE ships via LTL freight. The free, courteous delivery includes lift-gate service.

Sizing

HUUM Sauna Heater Size Calculator

HUUM HIVE Electric Sauna Heater with Included Air Tunnel | 12, 15 & 18 kW

Rated 5.00 out of 5 based on 2 customer ratings

(2 customer reviews)

Full-size HUUM HIVE is built around 528 lb of stones for large residential and commercial-style sauna rooms from 424 to 989 cubic feet. The current 2025+ U.S. heater includes HUUM’s stainless-steel air tunnel to improve airflow, support the elements, and help them last longer. UKU control, UKU Extension Box, and sixteen 33-lb boxes of 2 to 4-inch stones are required and sold separately.

Build A Quote:

Model	CLIFF Core DROP HIVE HIVE Mini STEEL

Clear

Fast and Free Shipping!

Most HUUM HIVE packages leave our Chicago warehouse in 2 to 3 business days. They travel by freight to the distribution hub nearest you, and the carrier calls you to book a delivery window. Plan on someone being there to receive it.

Choose a HUUM UKU controller (required)

Your heater will not run without a UKU. Local mounts outside the hot room and runs the sauna from its own panel. Wi-Fi does the same and adds scheduling and remote start from the HUUM app, which is what you want when the sauna is not ten steps from the couch. Every finish below is the same controller underneath, so pick on looks and budget. Already own a UKU? Take the first option and we will check yours against this heater before anything ships.

I already own a compatible HUUM UKU controller package

UKU Wi-Fi, Black (recommended) +$1,324.00

UKU Wi-Fi, Black (recommended)(+$1,324.00)

Add the required stones: HIVE 12/15/18

The full-size HIVE holds about 528 lb of 2 to 4 inch stones, and stones do not come in the box with the heater. That comes to 16 boxes. Stack them loosely so air can move between them and the elements stay covered, and plan on restacking once a year.

I already have the approved 2–4 inch stones for HIVE 12/15/18

16 × 33-lb boxes of HUUM STONES 24 (528 lb supplied)(+$1,280.00)

Add the required UKU Extension Box

The UKU drives a heater up to 11 kW on its own. The full-size HIVE starts at 12 kW, so it needs this extension box wired in alongside the main module. Add one here and it ships with your heater.

I already own a compatible HUUM UKU Extension Box

HUUM UKU Extension Box (H2003012)(+$773.00)

Add-Ons

HIVE Safety Railing (Wood Ring around Heater) (+$396.00)

Flange for embedding Hive into floor or bench (+$397.00)

Hive Reflector – Cuts safety distances in half (+$328.00)

75′ Sensor/Door Cable Extension (+$176.00)

75′ Controller Cable Extension (+$143.00)

Spare Set of Heating Elements (+$476.00)

Compatible Sauna Lights

Ideal under-the-bench or behind-the-backrest lighting. Can be plugged into a standard outlet or hardwired into your HUUM Main Module. Can be cut and bent. See also: HUUM OVO Lights.

Free Quote For Sauna Wood

Did you know Sauna Marketplace specializes in premium Sauna Woods? Whether you’re looking for the highest grade material, a specific look, or to save money we have something for you.

I would like a call to discuss sauna woods, or other materials for my project.

Send free wood samples with my heater.

No, thank you.

We added you to this product's waitlist and we'll send you an email when the product is available.

Leave Waitlist

This product is currently sold out.

No worries! Enter your email, and we'll let you know as soon as it's back in stock.

Fulfillment Partner:

Bathing Distribution Center - Chicago

Zero Interest Payments:

Pay with HSA/FSA:

Marketplace 360

[3d_viewer id="466394"]

Ask about free Sauna Wood and Door shipping with your heater order!

Marketplace Knowledgebase

14 Videos

What to Expect

Freight Shipping w/ Liftgate Service

Shipping is free in the continental US. Please get in touch with us or check-out for Canada, Alaska, and Island shipping.

Free

Compatibility Check

We look for any issues with your order.

Same Day

Ready to Ship

Warehouse schedules shipment

1 Day

Delivered

Freight delivery with tracking. Our trusted shipping partners will contact you to schedule.

8-14 Days

'Whatever-It-Takes' Support

Unlimited access to tech support from SaunaMarketplace.com, Bathing Brands, and HUUM.

Support Details

This order is fulfilled by Bathing Brands in Chicago. That means you have full access to their top-knotch customer service and tech support, as well as SaunaMarketplace.com and HUUM support. We're with you and your contractors until it's operating as it should, no matter what.

Before your order ships, we provide contact information and reference numbers for each.

Warranty: 3 Years Private / 1 Year Commercial

HUUM Warranty does not include heating elements. SaunaMarketplace.com offers supplemental 2 year coverage for heating elements (additional charge).

Warranty Docs

HUUM Heater Warranty

SaunaMarketplace.com Elements Warranty (Additional Cost)

Experience the ultimate in sauna relaxation and luxury with the HUUM HIVE electric sauna heater.

The HUUM HIVE sauna heater is a masterpiece of design and engineering. It features a sleek, round shape made of brushed stainless steel that blends perfectly into any sauna interior. The heater is also incredibly efficient, using less energy than traditional sauna heaters to heat your sauna to the perfect temperature.

The HUUM HIVE sauna heater is available in a variety of sizes to fit any sauna, from small to large. The different models also offer different stone capacities, so you can choose the right heater for your needs.

No matter which HUUM HIVE sauna heater you choose, you can be sure that you are getting a high-quality product that will last for years to come. The heaters are made in Estonia using only the highest quality materials and craftsmanship.

If you are looking for a sauna heater that will transform your sauna experience, then the HUUM HIVE is the perfect choice for you. Order your HUUM HIVE sauna heater today and start enjoying the ultimate in sauna relaxation and luxury.

Here are some of the features of the HUUM HIVE sauna heater:

Sleek, round design made of brushed stainless steel
Incredibly efficient, using less energy than traditional sauna heaters
Available in a variety of sizes to fit any sauna
Different models offer different stone capacities
Made in Estonia using only the highest quality materials and craftsmanship

Benefits of using a HUUM HIVE sauna heater:

Enjoy a more relaxing and luxurious sauna experience
Save money on your energy bills
Extend the life of your sauna
Enjoy the peace of mind knowing that you are using a high-quality product

Order your HUUM HIVE sauna heater today and start enjoying the ultimate in sauna relaxation and luxury!

Always refer to the manual to confirm clearances, instructions, and safety instructions.

HUUM HIVE MANUAL

HUUM HIVE SPECS

HUUM Stone Requirements

HUUM Heater Warranty

Shop all commercial-grade sauna heaters

Expert help that stays with you

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Includes