It's a 6 kW wall-mounted electric sauna heater shaped like a drop of water. HUUM designed it to soften the hard angles of a typical sauna interior — it's the most sculptural heater in their range, and the one people buy as much for how it looks as for what it does.

Rooms from 177 to 353 cubic feet. That covers the great majority of home saunas.

Length × width × height in feet. A 6' × 6' room with a 7' ceiling is 252 cubic feet, right in the middle of this heater's range. If you're near either end of the band, send us your dimensions and we'll check it properly.

Yes. Glass sheds heat faster than insulated timber, so a glass-fronted room behaves like a larger one. Tell us your glass area before you order and we'll size against it rather than raw volume.

Deliberately. A sauna is a room of straight lines and right angles, and a conventional heater is another box in it. The DROP's rounded form is the visual counterpoint — it reads as an object rather than an appliance. If the look of your sauna matters to you, this is the heater that changes it most.

It performs. 122 lbs of stone is a serious mass for a wall-mounted heater — most wall units carry 40 to 50 lbs — and the exposed-stone design gives a long, mild heat rather than a sharp radiant one. The shape isn't at the expense of the sauna.

Yes, and this is not optional. Every HUUM heater requires a UKU controller, sold separately. There is no built-in control version — a DROP without a UKU simply won't run.

The UKU Local for straightforward digital control at the wall, or the UKU Wi-Fi if you want app control and scheduling from your phone. There are also Glass, Mirror and Gold finishes. Tell us how you'll use the sauna and we'll recommend one.

No. That's only required for heaters 12 kW and above. A 6 kW heater runs on the UKU controller alone.

240V single phase, drawing 25 amps. It's hardwired — no plug.

Possibly, if you're replacing another 6 kW heater — 25 amps is the same draw as most 6 kW units. Send us a photo of your breaker and the old heater's rating plate and we'll confirm before you spend anything.

Yes, any licensed electrician can. Give them the manual and the load figures before they quote rather than after — the UKU controller wiring is part of the same job.

23" wide × 15" deep × 14" high (584 × 381 × 356 mm). Wide and low rather than tall.

21.9 lbs empty — but it takes 122 lbs of stones, so plan for close to 145 lbs hanging on your wall.

Only if it's mounted into proper framing. 145 lbs on cladding alone is not acceptable. If you're building the sauna, tell your carpenter where the heater goes so blocking can be added before the walls close up — this is the single most important thing to get right on a wall-mounted heater with this much stone.

On the wall. A mounting bracket is supplied in the box.

Minimum clearances to walls, benches and ceiling are in the installation manual and they're a fire-safety requirement, not a suggestion. Check them before you finalise bench placement — the DROP's width means the horizontal clearances matter more than usual.

No. The DROP takes 122 lbs of stones — four boxes of 5–10 cm stones at 33 lbs each — ordered separately. The heater won't run safely without them.

Yes, and it's unusual — most wall units at this output carry a fraction of that. It's what gives the DROP a heat character closer to a large floor heater than a typical wall model, and it's why a modest 6 kW here delivers a substantial löyly.

No. Every DROP in the range takes the same 122 lbs — they share one body. The kW rating determines how large a room it heats; the stone mass and heat character are identical across the range.

Yes, and it isn't optional. Budget for it properly when pricing the project — 122 lbs of rock is a real cost and a real freight item. Ask us for a delivered price on the complete package rather than being surprised later.

5–10 cm, the same as the CORE. Note the CLIFF range takes smaller 1"–2" (3–5 cm) stones — they aren't interchangeable, so check the model before ordering.

Only proper sauna stones in the specified size. Never river rock, granite, or decorative landscape stone — ordinary rock can crack or explode when water hits it at temperature.

Rinse them first, then stack loosely so air moves freely between them — never wedged tight or forced around the elements. The manual shows the correct arrangement, and on a rounded heater the stacking pattern is part of the look as well as the function.

Inspect them once a year. They break down with repeated heating and cooling, and crumbling stones choke airflow through the heater. Restack as they settle, replace when they start falling apart.

The stones sit directly against the heating elements rather than being separated by a shield. Heat transfers into the stone mass more efficiently, which is what gives the heater its steam response when you ladle water.

By design. More exposed stone gives a longer, milder heat — the warmth comes off the stone mass rather than radiating hard off metal. It's a softer sauna than a heater with the stones enclosed.

Ask us to confirm the maximum setting for this model. Across the HUUM range heaters run to Finnish temperatures, and most people sit between 70 and 85°C in practice.

122 lbs of stone takes time to charge properly, and a 6 kW moving that mass takes longer than the larger DROPs. It holds heat far better once there. Exact timing depends on your room size, insulation and starting temperature.

Yes — that's the point of a traditional heater. Ladle water over the stones for löyly. Plain water, a ladleful at a time, never poured directly onto the elements.

Only products made for sauna use, diluted in the water bucket rather than poured neat on the stones. Undiluted oils can scorch, stain the stones, and in some cases ignite.

Brushed stainless steel construction, with stainless steel industrial-quality heating elements.

Yes — HUUM stock replacement elements as service parts. Worth knowing, because elements are excluded from the warranty as a wear item.

The heater, wall-mount bracket, the installation and operation manual, and the warranty. Stones and the UKU controller are separate.

Three years limited residential, and one year limited commercial — both excluding the heating elements, which are treated as a wear item. Ask us for the current written terms before you order.

Heating elements are consumable in any sauna heater, like stones. HUUM stock them as service parts, and how long yours last depends heavily on whether you keep the stones properly stacked — packed-tight stones are the main cause of early element failure.

Yes — it carries a one-year commercial warranty. If it's going into a gym, spa or hotel, tell us; we handle commercial projects regularly and there may be considerations around duty cycle worth discussing.

It carries CE, SGS and IPX4 marks. Ask us to confirm the current North American listing before you order and we'll send it in writing — your electrical inspector will want documentation.

Designed, engineered and crafted in Estonia.

One step up, covering 230 to 441 cubic feet against this one's 177 to 353, and drawing 31.25 amps against 25. Same body, same stone. There's overlap between 230 and 353 cubic feet — in that band either works, and this 6 kW is cheaper both to buy and to wire.

One step down, covering 106 to 247 cubic feet at 18.8 amps. If your sauna is small, that's the cheaper choice on the lightest circuit in the range. Overlap runs from 177 to 247 cubic feet.

Same output, entirely different objects. The CLIFF is a tall floor-standing column carrying 165 lbs of stone with exceptionally tight clearances, and it ships LTL freight. The DROP is a wide wall-mounted sculpture carrying 122 lbs that ships parcel — and it's considerably cheaper. If floor space is scarce or budget matters, the DROP.

The CORE is floor-standing, can be embedded into a bench, and carries 66 lbs of stone. The DROP is wall-mounted with nearly double the stone and a sculptural shape, and it's cheaper. Choose on how you want the heater to sit in the room.

No. Oversizing means a bigger circuit, a bigger installation cost, and a sauna that short-cycles and never develops proper steam. Since every DROP carries the same stone mass, going up in output gains you nothing but room capacity — size to the room.

By parcel carrier — the DROP range doesn't require LTL freight, unlike the CLIFF and CORE. That makes delivery simpler and generally cheaper. The stones ship separately.

HUUM's supplier lead time runs around 40 days, so this isn't a stock item you'll have next week. If you're working to a build schedule, order early and tell us your deadline so we can be straight with you about whether it's achievable.

Wipe the casing occasionally, check and restack the stones annually, keep debris from building up around the unit, and let the room air out after each session.

Call us. We handle warranty claims directly with HUUM rather than handing you a phone number, and service parts including elements are available.

Because a working installation is the heater, a UKU controller, 122 lbs of stone and an electrical job. Freight varies by address. Request pricing and you'll get one delivered figure for the complete setup rather than a number you have to keep adding to.

We're an authorized HUUM dealer. On a wall-mounted heater carrying 145 lbs loaded, confirming your wall framing and the whole package before you order is worth more than a slightly cheaper box.

Please review our return policy at thesaunarepublic.com/policies/refund-policy. Because heaters are sized to a specific room and hardwired on installation, talk to us before ordering if you have any questions.