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HUUM DROP 6 kW Electric Sauna Heater (240 V)

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HUUM DROP 6 kW Electric Sauna Heater (240 V)

A compact Estonian stainless steel heater with up to 121 lb of stones and an SGS North America certificate to UL 60335-1 and CSA E60335-2-53. It needs a separate control, and US warranty claims go to HUUM in Estonia.

Best for Builders who want an all-stainless wall heater with a big stone mass, accept a separate UKU control and an app, and can handle a warranty claim with the maker abroad.

Our rating
Good (4.1 of 5)
Price range
Premium
Verified marks
SGS North America certificate SGSNA/20/SUW/00067X (UL 60335-1, CAN/CSA C22.2 No. 60335-1 and CAN/CSA E60335-2-53), covering Drop 4.5, 6, 7.5 and 9 kW; SGS’s own certificate page shows it valid, issued 2025-06-27
Size
Wall-mounted, about 15.4 in W x 13.2 in D x 23.3 in H, 24 lb; 6 kW on 240 V (30 A breaker, 10 AWG); rooms of 177 to 318 ft³ (5 to 9 m³); holds up to 55 kg (121 lb) of stones
Made in
Estonia

approx. $3,441 as a package with stones, safety railing and a UKU Wi-Fi control ($1,506 for the heater alone), Finnish Sauna Builders, 2026-10-23

See it on HUUM’s site → (opens in a new tab)

We are not affiliated with HUUM. This link goes to the maker’s own page, with no tracking code. How we're funded.

Also sold at Finnish Sauna Builders (retailer) ($1,506 for the heater alone; approx. $3,441 as the Ultimate Package (heater, stones, safety railing, UKU Wi-Fi control); UKU local control $1,062 and Wi-Fi control $1,324 on their own), Amazon ($3,150 with a UKU Wi-Fi control and stones (approx. $2,888 with the local control)), Haven of Heat (retailer) ($3,150 with a UKU Wi-Fi control and stones ($1,506 for the heater alone)) , and 1 more.

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    Reviews are personal experiences, not research, and they never change our quality ratings. Every review is read by our team before it appears.

    How we evaluated it

    How it scores Our rating, metric by metric Good, 4.1 of 5
    1. Heat & steam 25% of the rating 4 of 5

      A 6 kW heater with up to 121 lb of stones in direct contact with the elements for 177 to 318 ft³, which gives a lot of steam for a wall unit; the maker’s page states no maximum temperature, and a dealer lists a settable 122 to 230 °F.

    2. Build 15% of the rating 5 of 5

      Stainless steel body and stainless elements, made in Estonia, with no painted or plastic part on the hot side stated.

    3. Safety listing 25% of the rating 5 of 5

      SGS North America, an OSHA-recognized lab for UL 60335-1, lists the Drop 6 kW to UL 60335-1 and CSA E60335-2-53 with HUUM’s UKU control, and SGS’s own certificate page shows the certificate valid.

    4. Durability 20% of the rating 3 of 5

      HUUM’s own terms give 3 years for private use and exclude the elements and stones, and a US dealer says warranty and parts claims now go to HUUM in Estonia.

    5. Value 15% of the rating 3 of 5

      About $2,890 for the heater, local control and stones, $3,150 with the Wi-Fi control, or $3,441 as one dealer’s package that adds a safety railing, for a heater that covers 177 to 318 ft³.

    The rating, 4.1 of 5, is the weighted average of these scores. See how we rank sauna heaters and our standard.

    Where to buy Stores and the prices we saw 4 stores
    • Finnish Sauna Builders (retailer) (opens in a new tab) approx. $1,506 for the heater alone; approx. $3,441 as the Ultimate Package (heater, stones, safety railing, UKU Wi-Fi control); UKU local control $1,062 and Wi-Fi control $1,324 on their own. A retailer, not the maker. This heater page lists a 5-year warranty (excluding elements). The separate Ultimate Package page says the dealer can no longer handle HUUM parts and warranty claims, which go to HUUM in Estonia.
    • Amazon (opens in a new tab) approx. $3,150 with a UKU Wi-Fi control and stones (approx. $2,888 with the local control). Bundle for the 6 kW size with the black Wi-Fi control; the local-control bundle of the same heater is ASIN B0F1B7CM8W. Sold and shipped by BathingBrands, a sauna wholesaler. HUUM’s terms cover products sold by HUUM or its authorized dealers, so ask whether the seller is one.
    • Haven of Heat (retailer) (opens in a new tab) approx. $3,150 with a UKU Wi-Fi control and stones ($1,506 for the heater alone). The 6 kW size of its package. The heater alone is a separate page, which lists a settable range of 122 to 230 °F.
    • SaunaHeaters.com (retailer) (opens in a new tab) approx. $3,150 with a UKU Wi-Fi control and stones (approx. $2,888 with the local control). Its page says “SGS Listed” and gives HUUM’s 3-year residential warranty, excluding elements.

    Prices as we saw them on November 3, 2026. They change often. These links carry no tracking code and earn us nothing.

    What it’s made of What touches your food, water, skin or air 4 materials
    1. Stainless steel body (the maker says the heaters are made from stainless steel)
    2. Stainless steel heating elements, per the dealer
    3. Needs a HUUM UKU control (local, or Wi-Fi through the HUUM app), sold separately; the control panel comes in a black plastic, glass or wood finish
    4. Takes about 121 lb of 5 to 10 cm sauna stones, not included in the heater price (HUUM and the dealer sell stones by the box)
    Who tested it What each test found, and who paid for it 1 test
    • Paid certification SGS North America (certificate for HUUM heaters) June 2025

      SGS’s own certificate page, reached through the QR code on the certificate, shows SGSNA/20/SUW/00067X as valid, issued 2025-06-27 to HUUM Sauna OÜ under the SGS Listed Mark, naming Drop 4.5, 6, 7.5 and 9 kW and other HUUM heaters to UL 60335-1, CAN/CSA C22.2 No. 60335-1 and CAN/CSA E60335-2-53. The heaters are for use with sauna stones and the UKU controller only, and the 9 kW Drop needs its heat deflector. Open ↗ (opens in a new tab)

    Who paid, and why it matters
    • Independent The tester took no money from the maker for it: a consumer group, a journalist, a university or a regulator.
    • Paid certification An outside lab or certifier tested or listed it, and the maker paid for that.
    • Maker’s own test A lab report or certificate of analysis the maker commissioned and published.

    A certification is a floor, not a verdict: it checks what its program checks and nothing else. We weigh tests by someone with no stake in the result most.

    What people ask Worries raised online and elsewhere, and what we found 4 questions
    Is it certified for North America?
    Yes. SGS North America’s own certificate page (opens in a new tab), which the QR code on the certificate PDF (opens in a new tab) points to, lists the Drop 6 kW to UL 60335-1 and CSA E60335-2-53 and shows the certificate valid. The heater has no controls of its own and was evaluated with HUUM’s UKU controller, so use it with that control. HUUM’s own certificates page (opens in a new tab) shows only CE, SZU and ISO 9001.
    Who handles the warranty in the US?
    HUUM’s warranty terms (opens in a new tab) give 3 years for electrical heaters in private use and 1 year in commercial use, and exclude the heating elements and the sauna stones. The terms also say the warranty applies to new products sold by HUUM or its authorized dealers and their resellers. Finnish Sauna Builders lists a 5-year warranty on the heater page and, on its Drop package page, says it can no longer handle HUUM parts or warranty claims, which must go to HUUM in Estonia (support@huum.eu).
    Is the heater controlled over Wi-Fi?
    It needs a HUUM UKU control. The local version has no connection. The Wi-Fi version connects through the HUUM app so you can preheat from your phone, and costs about $260 more at the dealer. We did not review what the app collects.
    Why does HUUM insist on a safety railing?
    The maker says it strongly recommends a safety railing around the DROP, either one made by your builder or HUUM’s. The railing is part of the dealer’s package.
    Why we chose it What put it on our list 4 points
    • Stainless throughout: the maker says its heaters are stainless steel, and the dealer says the elements are too.
    • A big stone mass for a wall unit: up to 55 kg (121 lb), in contact with the elements, which the maker says gives gentle, long-lasting steam.
    • A named certificate. SGS North America’s certificate lists the Drop 6 kW to UL 60335-1 and CSA E60335-2-53.
    • HUUM publishes its warranty terms in full, with what is excluded and what the owner must do.
    Trade-offs What to weigh before you buy 4 points
    • It cannot run without a UKU control, which costs $1,062 (local) or $1,324 (Wi-Fi) at the dealer, and without stones.
    • Its listing is to UL 60335-1 and CSA E60335-2-53, not the UL 875 on Harvia’s heaters, and it holds only with HUUM’s UKU control.
    • The warranty is 3 years in HUUM’s terms, not the 5 years a dealer quotes, and it excludes elements and stones. A US dealer says claims go to HUUM in Estonia.
    • It is the most expensive heater here as a package, at about $3,441.
    What to know Details worth knowing first

    HUUM’s DROP is a wall-mounted heater in stainless steel with a large stone capacity for its size, up to 55 kg. Finnish saunas, the kind the long-term studies followed, run at 80 to 100 °C with 10 to 20% humidity (review (opens in a new tab)), and this heater is built for that kind of session, with a control that you buy separately.

    An SGS North America certificate lists the Drop 6 kW to UL 60335-1 and CSA E60335-2-53. The copy we read sits on a retailer’s site, HUUM’s own certificates page does not show it, and we could not open SGS’s directory, so we call it a certificate we read, not a listing we checked.

    HUUM’s published terms give three years in private use and exclude the elements and stones. A US dealer quotes five years and says warranty and parts claims now go to HUUM in Estonia. Ask a doctor first if you have a heart condition or are pregnant.

    What we checked Each claim, and how sure we are of it 5 checks
    Third-party tested
    Yes
    Tested by
    SGS North America (certificate to UL 60335-1 and CSA E60335-2-53)
    How HUUM DROP 6 kW Electric Sauna Heater (240 V) measures up against our sauna heaters criteria
    What we checked What we found
    Stones and steam Maker’s claim Up to 55 kg (121 lb) of 5 to 10 cm stones, in contact with the elements, for 5 to 9 m³ (177 to 318 ft³), per the maker. The maker’s page states no maximum temperature. We have no measured temperatures.
    Safety listing Verified SGS North America certificate SGSNA/20/SUW/00067X names Drop 6 kW and lists UL 60335-1, CAN/CSA C22.2 No. 60335-1 and CAN/CSA E60335-2-53, with conditions (UKU controller, sauna stones). SGS’s own certificate page shows it valid, issued 2025-06-27.
    Build and materials Maker’s claim Stainless steel body and elements per the maker and dealer; made in Estonia. We have no independent check of the steel grade.
    Wiring and clearances Maker’s claim 240 V, 1 phase, 25 A load, 30 A breaker, 10 AWG (the maker’s table and the dealer). The maker lists safety distances in a table; we did not verify them.
    Recalls and notices Verified A search of the US Consumer Product Safety Commission recall data on 2026-10-23 found no recall naming HUUM, and California’s Prop 65 notice search did not find a notice naming HUUM.
    What the labels mean
    • Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
    • Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
    • Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.
    Sources Where our facts come from 12 sources
    1. HUUM DROP electric sauna heater: maker’s US product page. Maker’s page. Stainless steel, 55 kg of stones, room sizes, circuit table and the safety railing advice, seen 2026-10-23. Open ↗ (opens in a new tab)
    2. SGS North America certificate of compliance for HUUM sauna heaters (PDF). Certifier or regulator listing. Certificate SGSNA/20/SUW/00067X, effective 2022-09-02. Hosted by a retailer, not by HUUM. Open ↗ (opens in a new tab)
    3. SGS certificate record SGSNA/20/SUW/00067X (SGS’s own page). Certifier or regulator listing. Open ↗ (opens in a new tab)
    4. HUUM limited warranty terms (PDF). Maker’s page. Electrical heaters 3 years in private use; excludes heating elements and sauna stones; spare parts 1 year. Open ↗ (opens in a new tab)
    5. HUUM certificates. Maker’s page. Shows CE, SZU, ISO 9001 and BImSchV II certificates, not the SGS certificate. Open ↗ (opens in a new tab)
    6. Finnish Sauna Builders: HUUM Drop 6 kW. Independent source. Dealer price, wire size and stone requirement. Open ↗ (opens in a new tab)
    7. Finnish Sauna Builders: HUUM Drop 6 kW Ultimate Package (support notice). Independent source. $3,441 package. The page says the dealer can no longer handle HUUM parts and warranty claims. Open ↗ (opens in a new tab)
    8. Amazon: HUUM Drop Series Sauna Heater with UKU WiFi Control Bundle, 6 kW (sold by BathingBrands). Independent source. $3,150 with stones, read 2026-10-23; the local-control bundle (B0F1B7CM8W) is $2,888. Open ↗ (opens in a new tab)
    9. Haven of Heat: HUUM Drop package with UKU Wi-Fi control and stones. Independent source. $3,150 for the 6 kW size; its heater page lists 122 to 230 °F. Open ↗ (opens in a new tab)
    10. SaunaHeaters.com: HUUM Drop 6 kW package. Independent source. $2,888 with the local control, $3,150 with Wi-Fi; says SGS Listed and a 3-year residential warranty. Open ↗ (opens in a new tab)
    11. US Consumer Product Safety Commission: recalls with “sauna” in the title. Certifier or regulator listing. Open ↗ (opens in a new tab)
    12. California Attorney General: Prop 65 60-day notice search. Certifier or regulator listing. No notice names HUUM (searched 2026-10-23). Open ↗ (opens in a new tab)
    Alternatives Other options to compare 2 options
    • Harvia Cilindro PC90 Floor-standing, built-in dials, 200 lb of stones, a model-level match in Intertek’s UL 875 listing. About $1,920 with stones.
    • Saunum AIR 5 A UL-certified heater with a fan; 2-year warranty. About $2,895 for the heater, $4,410 with the control it needs and stones.

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