HUUM DROP 7STU Pkg DROP Series 7.5kW Sauna Heater Package
The HUUM DROP 7STU Package is the complete ready-to-operate bundle for the 7.5kW DROP electric sauna heater - including the heater, UKU Local controller, and 121 lbs of sauna stones (4 boxes, 5-10 cm rounded olivine). The DROP is an entirely different product platform from the CLIFF and STEEL: where those heaters are slim floor-standing pillars, the DROP is a wall-mounted hemispheric heater inspired by the form of a water droplet. It tapers from a wide stone-holding basket at the top into a narrower base, creating a sculptural shape that HUUM describes as the statement piece of the sauna room. The DROP won the Red Dot Design Award for its masterful craftsmanship and unique aesthetic. At 7.5kW with a 121-lb stone capacity, it covers sauna rooms from 248 to 389 adjusted cubic feet. The DROP 7.5kW requires a 40A circuit breaker and 8AWG wire - a larger electrical requirement than the CLIFF and STEEL 6kW models (30A/10AWG). No UKU Extension Box is required for the 7.5kW DROP. The heater includes a Heater Element Separator and Heat Shield Hood as standard. The bottom of the wall mounting bracket sits 12.2" above the hard floor. Minimum wall thickness of 3.94" (100mm) is required - the DROP must be anchored to wall framing, not cedar paneling alone. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.
The DROP platform - hemispheric wall-mounted water-drop form
The HUUM DROP is described by HUUM as being inspired by the absolute purest of elements in nature - a drop of water. Its organic, hemispherical silhouette is the most visually distinctive wall-mounted sauna heater form on the market - a sculptural shape that tapers from a wide stone-holding open basket at the top to a narrower base, mimicking the outline of a water droplet suspended at the moment before it falls. HUUM's own description of the result: the organic and minimalist design of the DROP heater makes it the statement piece of the sauna. The open basket exposes all 121 lbs of rounded olivine stones to the sauna air and to the bather's ladle of water, maximising the visible stone surface and stone contact with the heating elements. The DROP received the Red Dot Design Award - one of three Red Dot awards HUUM has earned across their product lineup - for the combination of sculptural design, HUUM's stone-primary philosophy, and the practical elegance of integrating a large stone capacity into a wall-mounted form.
Stone-primary philosophy in a wall-mounted form
HUUM applies the same stone-primary philosophy to the DROP that runs through the CLIFF and STEEL platforms: build using very little metal so that heat comes mainly from the stones and only very little from the metal. HUUM's description of the consequence: this maximises the good negative ions from the stones, like in traditional saunas, and keeps the positive ions from the metal at a minimum. At 121 lbs of stones in a wall-mounted 7.5kW heater, the stone-to-power ratio is deliberately high - more stone mass than most wood-burning stoves in a comparable size class. HUUM notes this directly: despite its compact size, this heater can accommodate up to 55 kg of stones, which is more than most wood-burning heaters. The large stone mass produces soft, consistent steam and long-lasting heat with each ladle of water. The 5-10 cm rounded olivine stones included in the package are HUUM's recommended specification for the DROP - rounder stones allow better airflow through the stone basket and produce milder steam.
Package contents and critical installation notes
The DROP 7STU Package includes the DROP 7.5kW heater, UKU Local controller, and 121 lbs of sauna stones (4 boxes, 5-10 cm). No UKU Extension Box is required for the 7.5kW - unlike the CLIFF 9 and CLIFF 10.5 packages. The heater also includes a Heater Element Separator and Heat Shield Hood as standard items that protect the heating elements and the sauna wall behind the heater. The electrical specification for the DROP 7.5kW requires a 40A dedicated circuit and 8AWG wire - larger than the CLIFF and STEEL 6kW models (30A/10AWG). The wall mounting bracket bottom sits 12.2" above the hard floor surface. Minimum wall thickness is 3.94" (100mm) - the DROP must be securely anchored to wall framing studs, not to cedar paneling alone. The total weight of the heater and stones together is approximately 157 lbs, which requires solid structural anchoring. Optional Flange D embedding flange (sold separately) allows the DROP to be partially set into a sauna bench - at least 14.8" of the heater must protrude above the bench surface in this configuration.
7.5kW wall-mounted electric sauna heater package for rooms from 248 to 389 adjusted cubic feet. DROP 7STU Pkg - complete package: DROP 7.5kW heater, UKU Local controller, and 121 lbs stones (4 boxes, 5-10 cm rounded olivine). No UKU Extension Box required. Hemispheric water-drop form - Red Dot Design Award winner. Stone-primary design - 121 lbs in an open basket exceeds most wood-burning stoves. Heater Element Separator and Heat Shield Hood included. Wall-mounted: bracket bottom 12.2" from hard floor. Min. wall thickness 3.94" (100mm). Anchor to framing - not cedar paneling alone. 240V/1PH - 40A circuit breaker - 8AWG (note: different from CLIFF/STEEL 6kW which require 30A/10AWG). Max 230°F. Stone Placement Video included. Optional: DROP safety railing; Flange D bench embedding; Drip Tray. SGS certified. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.
7.5 kW248 to 389 cu ft (adjusted)Complete package - heater, UKU Local, and 121 lbs stonesNo UKU Extension Box requiredDROP - hemispheric water-drop form - wall-mountedRed Dot Design Award winnerStone-primary - 121 lbs exceeds most wood-burning stovesHeater Element Separator and Heat Shield Hood includedBracket bottom 12.2" from hard floorMin. wall thickness 3.94" - anchor to framing required240V/1PH - 40A - 8AWGMax 230°FOptional DROP safety railingOptional Flange D bench embeddingOptional Drip TraySGS certified5-year limited warranty (excl. elements)Designed and made in Estonia by HUUM
Specifications
Package contents
Heater
HUUM DROP 7.5kW wall-mounted electric sauna heater
Controller (included)
UKU Local controller
UKU Extension Box
Not required and not included for 7.5kW
Stones (included)
121 lbs / 55 kg (4 boxes, 5-10 cm rounded olivine)
Element Separator (included)
Heater Element Separator - protects heating elements
Heat Shield Hood (included)
Heat Shield Hood - wall protection behind heater
Performance
Power output
7.5 kW
Fuel type
Electric (240V/1PH)
Room volume
248 to 389 cu ft (adjusted)
Max temperature
230°F (110°C)
Stone capacity
121 lbs / 55 kg (4 boxes, 5-10 cm) - included in package
Stone size
5-10 cm rounded olivine (2-4 in)
Stone contact
Direct - stones in contact with heating elements
Heat philosophy
Stone-primary - minimal metal mass by design
DROP design and awards
Form
Hemispheric water-drop silhouette - wall-mounted
Design inspiration
A drop of water - HUUM's description
Design award
Red Dot Design Award winner
Stone display
Open basket - 121 lbs stones fully visible in sauna
Stone-to-size ratio
More stone capacity than most wood-burning stoves
DROP vs CLIFF vs STEEL - platform comparison
DROP form
Hemispheric water-drop, wall-mounted, open basket
CLIFF form
Slim rectangle open-cage pillar, floor-standing
STEEL form
Slim enclosed square-pillar, floor-standing or wall (Mini)
DROP stones
5-10 cm rounded olivine (2-4 in)
CLIFF/STEEL stones
3-5 cm rounded olivine (1-2 in) - smaller
DROP electrical (7.5kW)
40A / 8AWG
CLIFF/STEEL 6kW electrical
30A / 10AWG
Wall mounting requirements
Mounting type
Wall-mounted with bracket
Bracket bottom height from floor
12.2 in (310 mm) above hard floor
Minimum wall thickness
3.94 in (100 mm)
Wall anchoring requirement
Must anchor to framing studs - not cedar paneling alone
Total weight (heater + stones)
Approx. 157 lbs - structural anchoring required
Bench embedding option
Min. 14.8 in must protrude above bench surface (Flange D)
Electrical (DROP 7.5kW)
Voltage / phase
240VAC, 1-phase, 60Hz
Circuit breaker
40A dedicated circuit
Wire size
8AWG
Note vs CLIFF/STEEL 6kW
DROP 7.5kW requires 40A/8AWG (vs 30A/10AWG)
UKU Extension Box
Not required for 7.5kW
Certification
SGS certified
Max temperature
230°F (110°C)
UKU Local controller (included) and optional accessories
Controller type
UKU Local - physical wall panel
Remote / app control
Not available (UKU Local - no Wi-Fi)
Safety features
Door sensor, overheating protection, child safety lock
Wi-Fi upgrade
UKU Wi-Fi controller available separately
Safety railing
DROP safety railing (DROP-specific) - sold separately
Bench embedding
Flange D (DROP-specific) - sold separately
Water management
Drip Tray (catches water runoff) - sold separately
Origin
Designed and made in Estonia by HUUM
Warranty
5-year limited warranty (excluding elements)
What's included
HUUM DROP 7.5kW wall-mounted electric sauna heater
UKU Local controller (wall panel)
132 lbs of 2" - 4" (5-10 cm) Round Sauna Stones
Wall mounting bracket
DROP Installation and Operation Manual
UKU Installation and Operation Manual
5-year limited warranty (excluding elements)
Required (not included): Licensed electrician for wiring (240V/1PH, 40A dedicated circuit, 8AWG wire). An additional box of stones is recommended. Wall must be anchored to framing studs (minimum 3.94" / 100mm wall thickness). Optional DROP-specific accessories (sold separately): DROP safety railing; Flange D embedding flange (bench integration); Drip Tray (catches water runoff). To upgrade to Wi-Fi control, the UKU Wi-Fi controller is available separately.
Why the HUUM DROP 7STU Package stands out
Complete package - heater, UKU Local, and 121 lbs of stones
The DROP 7STU Package combines the three items needed to operate the DROP 7.5kW into a single order. The DROP has no built-in controls and requires a UKU controller for all operation. Unlike the CLIFF 9 and 10.5 packages, no UKU Extension Box is required for the 7.5kW model - only the heater, controller, and stones are needed. All three arrive together. The only requirement that remains after delivery is the licensed electrician for the 240V/1PH, 40A, 8AWG wiring and the structural wall mounting. The package includes the DROP-specific Heater Element Separator and Heat Shield Hood alongside the heater - both are protective accessories specific to the DROP platform.
Hemispheric water-drop form - Red Dot Award winner
The DROP's hemispherical silhouette is unlike any other electric sauna heater form. It tapers from a wide open stone basket at the top into a narrower base, mimicking the outline of a water droplet. HUUM's description of the design: the sculptural hemispheric shape of this sauna heater mimics the absolute purest of elements in nature - a drop of water. The organic and minimalist design of the DROP heater makes it the statement piece of the sauna. The DROP received the Red Dot Design Award - one of three Red Dot awards HUUM has earned - for the combination of artistic design, functional stone-primary philosophy, and the elegant integration of a large stone capacity into a wall-mounted form.
121 lbs of stones - more than most wood-burning stoves
HUUM's own description of the DROP's stone capacity is direct and precise: despite its compact size, this heater can accommodate up to 55 kg of stones, which is more than most wood-burning heaters. At 121 lbs in a wall-mounted 7.5kW heater, the DROP holds significantly more stone mass than most heaters in its output and size class. The open basket exposes all 121 lbs of stones to the sauna air and to the bather's ladle of water. Direct contact between the stones and the heating elements maximises heat transfer efficiency. HUUM's stone-primary philosophy: the heat comes mainly from the stones and only very little from the metal, maximising the good negative ions from the stones as in traditional saunas.
40A / 8AWG - important electrical distinction from CLIFF/STEEL 6kW
The DROP 7.5kW requires a 40A dedicated circuit and 8AWG wire. This is a larger electrical requirement than the CLIFF 6 and STEEL 6 (both 30A/10AWG) and than the STEEL Mini 4 (15A/14AWG). Buyers moving to the DROP from a CLIFF 6 or STEEL 6 installation, or comparing the two platforms side by side, need to account for this difference when planning the electrical installation. A licensed electrician should confirm the correct circuit capacity before installation. The DROP 7.5kW does not require a UKU Extension Box, unlike the CLIFF 9 and CLIFF 10.5 packages - the electrical sizing is the main installation distinction to plan for.
The DROP 7.5kW heater and stones together weigh approximately 157 lbs. HUUM's installation guidance is explicit: the DROP must not be hung from cedar paneling alone - it must be anchored securely to wall framing studs. Minimum wall thickness of 3.94" (100mm) is required. The mounting bracket bottom sits 12.2" above the hard floor surface (cement or tile - not wooden subfloor). These requirements are specific to the DROP's wall-mounted configuration and larger stone mass compared to the STEEL Mini 4. The included DROP Installation Video and Stone Placement Video cover the correct mounting procedure and stone loading sequence in detail, and both are available through the product page documentation.
DROP Series - 4.5kW, 6kW, 7.5kW, and 9kW models
The DROP 7STU Package covers the 7.5kW configuration of the DROP Series. The DROP platform spans four output levels: DROP 4.5 (4.5kW, 110-248 cu ft, 30A/10AWG), DROP 6 (6kW, 180-350 cu ft, 30A/10AWG), DROP 7.5 in this package (7.5kW, 248-389 cu ft, 40A/8AWG), and DROP 9 (9kW, 290-530 cu ft, 40A/8AWG). All four share the same hemispheric water-drop form, stone-primary philosophy, Red Dot Award-winning design, open stone basket with direct element contact, Heater Element Separator and Heat Shield Hood inclusion, SGS certification, and 5-year warranty. The DROP 7.5 and DROP 9 require 40A/8AWG; the 4.5 and 6 require 30A/10AWG. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.
About HUUM
Designed in Estonia - SGS Certified - DROP Series - Red Dot Award - Complete Package
HUUM DROP 7STU Pkg. 7.5kW. 248-389 cu ft. Heater, UKU Local, and 121 lbs stones. Red Dot Award.
HUUM is an Estonian sauna heater company. The DROP 7STU Package is the complete ready-to-operate bundle for the DROP 7.5kW wall-mounted heater - hemispheric water-drop form, Red Dot Award winner, stone-primary design with 121 lbs of stones (more than most wood-burning stoves), UKU Local controller, Heater Element Separator, and Heat Shield Hood included. 40A/8AWG wiring and structural wall anchoring required. We are an authorized HUUM dealer.
7.5kW wall-mounted - 248-389 cu ft - hemispheric water-drop form
Red Dot Design Award winner - HUUM's stone-primary philosophy
121 lbs stones included (4 boxes, 5-10 cm) - exceeds most wood-burning stoves
DROP 7STU Pkg vs CLIFF 9STU Pkg vs CLIFF 6 - HUUM electric heater comparison
DROP 7STU Pkg vs CLIFF 9STU Pkg vs CLIFF 6 - form, room range, and electrical requirements
Three HUUM electric heater options serve different room sizes, installation types, and design preferences. CLIFF 6 H1004012 (heater only): 6kW, 176-353 cu ft, floor-standing slim open-cage pillar, 10.6"W x 6.3"D, 165 lbs stones (5 boxes, 3-5 cm) sold separately, 2.36" side clearances, 30A/10AWG, no Extension Box. Right when the CLIFF's tightest clearances and floor-standing slim format are the priority. DROP 7STU Pkg 534-BDL-DROP75STULB (this listing): 7.5kW, 248-389 cu ft, wall-mounted hemispheric water-drop form, 121 lbs stones (4 boxes, 5-10 cm) included, UKU Local included, 40A/8AWG, no Extension Box. Right for medium home saunas where the DROP's award-winning wall-mounted form, stone-primary large capacity, and complete package purchase are the specification. CLIFF 9STU Pkg 534-BDL-CLIFF90STULB: 9kW, 317-529 cu ft, floor-standing slim open-cage pillar, 165 lbs stones (5 boxes, 3-5 cm) included, UKU Local + Extension Box included, 30A/10AWG, 9.45" side clearances. Right for larger rooms (317-529 cu ft) where the CLIFF's floor-standing open-cage pillar format is the specification. The DROP 7STU Package is the right choice when the 248-389 cu ft range, wall-mounted hemispheric design, and complete package format are the priorities.
The HUUM DROP 7.5kW carries HUUM's 5-year limited warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operation manual and stone placement video, use of incorrect stone type or size (decorative stones must not be used; only rounded olivine 5-10 cm recommended), operating without the required stone load, damage from inadequate electrical installation, or damage caused by hanging the heater from cedar paneling without proper structural anchoring to wall framing. The UKU Local controller included in the package carries its own separate HUUM product warranty terms. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.
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