HUUM — Electric Sauna Heaters, Wood-Burning Stoves & Accessories

HUUM is an Estonian sauna heater manufacturer known for award-winning minimalist design and large stone capacities that produce soft, enveloping steam. Every HUUM heater is designed and manufactured in Estonia. Where Harvia is the industry workhorse with the widest product range, HUUM is the design-forward alternative — heaters that look like sculptural art pieces while delivering exceptional heating performance. All HUUM electric heaters are controlled by the UKU system, available in WiFi (app-controlled from your phone) and Local (in-room panel) versions. We carry the full HUUM electric lineup, wood-burning stoves, UKU controllers, and accessories. Free shipping on all HUUM products, 0% APR financing available.

Not sure which HUUM heater fits your sauna? Read our complete HUUM heater guide or use our sauna heater sizing calculator to match the right kW rating to your sauna's cubic footage.

Wall-Mounted Electric Heaters

DROP (4.5 / 6 / 7.5 / 9 kW) — HUUM's signature heater and the most popular HUUM model we sell. Shaped like a water droplet, the DROP is one of the most visually distinctive sauna heaters on the market. Despite its compact wall-mounted design, it holds up to 122 lbs of stones — significantly more than most wall-mounted heaters — for rich, long-lasting steam. Heats saunas from 106–530 cubic feet, covering everything from small home saunas to mid-size commercial rooms. Available as heater only or as a complete package with UKU WiFi controller and stones. 240V. Read our HUUM DROP in-depth review or see how it compares: DROP vs. Harvia Spirit · DROP vs. Harvia KIP.

CLIFF (6 / 9 / 10.5 kW) — A slim, flat-profile wall-mounted heater with remarkably small safety distances, making it ideal for tight saunas where space between the heater and walls or benches is limited. The CLIFF's low-profile design takes up minimal room while still delivering strong heating performance. Available as heater only or complete package with UKU WiFi controller and stones. 240V. Read our CLIFF vs. STEEL comparison.

STEEL (6 / 9 / 10.5 kW) — Functionally identical to the CLIFF with the same slim profile, small safety distances, and kW ratings, but with a different exterior finish and aesthetic. The CLIFF and STEEL are the same heater with different looks — choose whichever finish matches your sauna's interior design. Available as heater only or complete package.

CLIFF Mini (3.5 kW) / STEEL Mini (3.5 kW) — Compact versions of the CLIFF and STEEL for very small saunas. At 3.5 kW, these are designed for compact home saunas where a full-size heater would be oversized. Same slim profile and small safety distances as the full-size models. Available as heater only or complete package with UKU WiFi controller and stones. 240V.

CORE (6.5 / 9 / 11 kW) — HUUM's newest electric heater. A refined, compact design that blends seamlessly into modern sauna interiors. Available as heater only or as a complete package with UKU WiFi controller and stones.

Floor-Standing Electric Heaters

HIVE Mini (6 / 9 / 10.5 kW) — A floor-mounted heater that brings the HIVE's iconic stacked-stone aesthetic to mid-size saunas. The natural stone appearance looks more like a piece of art than a heater — stones are visible through the open frame, creating a visual focal point in the sauna. Excellent thermal mass for soft, even steam. Available as heater only or complete package with UKU WiFi controller and stones. 240V. Can't decide between DROP and HIVE? Read our DROP vs. HIVE comparison.

HIVE (12 / 15 / 18 kW) — The powerhouse of the HUUM lineup. A floor-standing heater with an enormous 529 lbs of stone capacity — more than almost any residential heater on the market. The massive thermal mass produces steam that lasts for hours with minimal temperature fluctuation. Built for large home saunas and commercial environments (spas, hotels, wellness centers). Heats saunas from 424–1,236 cubic feet. Requires UKU Extension Box for heaters over 10.5 kW. Available as heater only or complete package with UKU WiFi controller, extension box, and stones. 240V. Shop all electric sauna heaters.

Wood-Burning Sauna Stoves

HUUM's wood-burning stoves carry the same design-forward aesthetic as their electric heaters — these are some of the most visually striking wood stoves on the market. Shop all wood-burning sauna stoves.

HIVE Flow Mini (8.5 kW) — HUUM's compact wood-burning stove with an innovative design that directs 75% of the heat from the fire into the stones rather than up the chimney. Efficient combustion in a smaller footprint.

HIVE Flow (9.8 kW) — The full-size version of the Flow Mini with the same high-efficiency design. Balances efficiency with eco-friendly performance for outdoor saunas and off-grid builds.

HIVE WOOD (13 / 17 kW) — HUUM's largest wood-burning stove. A visible fire chamber lets you watch the flames while you sauna — combining the primal experience of a wood-fired sauna with HUUM's distinctive stacked-stone visual. Available as stove only or in complete packages with thru-roof or thru-wall chimney kit, stones, and floor protection. Read our HUUM wood-burning stove comparison.

UKU Controllers & Accessories

UKU WiFi Controller — HUUM's smart control system. A minimalist touchscreen panel that controls temperature, timer, and delayed start, with WiFi connectivity for remote control from the HUUM app (iOS and Android). Pre-heat your sauna from your phone on the way home. The WiFi version is included in all HUUM complete heater packages. Read our HUUM app setup guide and WiFi connection guide.

UKU Local Controller — A stylish, durable in-room control panel without WiFi connectivity. For saunas without WiFi coverage or buyers who prefer a simple hardwired control without app features. Same minimalist design as the WiFi version.

UKU Extension Box — Required for HUUM electric heaters over 10.5 kW (HIVE 12/15/18 kW). The UKU main module handles heaters up to 10.5 kW; the extension box adds the additional power capacity needed for larger heaters.

Accessories: OVO Sauna Light — HUUM's signature sauna lamp with a smooth, egg-shaped design (one of our best-selling sauna accessories at 2,601 impressions and strong click performance). HIVE Reflector — A heat shield that reduces required safety distances around HIVE heaters, useful when installing in tighter spaces. Replacement UKU Control Panel — A direct replacement panel for damaged or worn UKU interfaces.

Heater Packages vs. Heater Only

Every HUUM electric heater is available in two formats: heater only (just the heater — you supply your own UKU controller, stones, and wiring) or complete package (heater + UKU WiFi controller + stones, ready to install). The complete packages are the better value for new sauna builds. Heater-only is for replacements or for buyers who already own a UKU controller. All HUUM electric heaters require 240V and a licensed electrician for installation.

Frequently Asked Questions

Which HUUM heater should I buy?

For most home saunas (100–530 cu ft), the DROP is the default recommendation — it's HUUM's most popular model, wall-mounted to save floor space, and holds more stone than most wall heaters for excellent steam quality. If your sauna has tight clearances, the CLIFF or STEEL have the smallest safety distances. If you want a floor-standing visual centerpiece, the HIVE Mini delivers the iconic stacked-stone look for mid-size rooms. For large or commercial saunas over 400 cu ft, the full HIVE is the flagship with unmatched thermal mass. Use our sauna heater sizing calculator to find the right kW for your room, then read our DROP vs. HIVE comparison to narrow it down.

How does HUUM compare to Harvia?

Harvia is the world's largest sauna heater manufacturer — Finnish-made with a wider product range, more control options, and lower entry pricing. HUUM wins on design aesthetics (the DROP and HIVE are visually in a different league), stone capacity per unit size, and the UKU app experience. Harvia has more heater models to choose from and broader commercial options. Both make excellent heaters — the choice often comes down to whether you prioritize design and steam quality (HUUM) or range and value (Harvia). Our HUUM vs. Harvia comparison is the most-read article on our entire site and covers every angle in detail.

What's the difference between CLIFF and STEEL?

They're the same heater with different exterior finishes. Same kW ratings, same slim profile, same small safety distances, same performance. Choose whichever finish matches your sauna interior. Read our CLIFF vs. STEEL comparison for the full visual and spec breakdown.

Do HUUM heaters require 240V?

Yes — all HUUM electric heaters require a dedicated 240V circuit and professional installation by a licensed electrician. HUUM does not offer a 120V option. If you need a heater that plugs into a standard household outlet, the Harvia Vega Compact is available in 120V versions for very small saunas.

Are HUUM heaters affected by tariffs?

HUUM heaters are manufactured in Estonia and imported to the U.S. Changes in trade policy and import tariffs can affect pricing. We recommend ordering at current pricing to lock in today's rates. Read our tariff alert article for the latest information on how potential tariff changes may impact HUUM and Harvia pricing.

Shop more: All Electric Sauna Heaters · Wood-Burning Stoves · Harvia Heaters · Complete Heater Packages · Heater Sizing Calculator · HUUM vs. Harvia · HUUM Heater Guide