









HUUM DROP Series 4.5kW Sauna Heater Package
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HUUM DROP 4.5STU Sauna Heater Package – Compact Elegance, Lasting Performance
The HUUM DROP 4.5STU Package brings elegance and award-winning design to smaller sauna spaces. This complete package includes the beautifully crafted DROP 4.5kW wall-mounted sauna heater, your choice of UKU Local or Wi-Fi-enabled control system, and 132 lbs of natural olivine sauna stones—ideal for sauna rooms ranging from 106 to 247 cubic feet.
At the heart of this setup is the DROP heater, inspired by the simplicity of a water droplet. Its sculptural, rounded form softens traditional sauna interiors while delivering powerful, consistent heat. Despite its compact footprint, the DROP holds an impressive 122 lbs of stones—more than many wood-burning heaters—ensuring long-lasting warmth and soft steam throughout your session.
Winner of the Red Dot Design Award, the HUUM DROP seamlessly blends form and function. With the optional UKU Wi-Fi control, you can preheat your sauna from anywhere using the HUUM mobile app, offering unmatched convenience.
Package Includes:
DROP 4.5kW Sauna Heater
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Iconic water-drop inspired design
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240V / 1-phase operation
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Suitable for sauna rooms from 106 to 247 cu. ft.
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Wall-mounted to maximize floor space
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122 lb stone capacity (4 boxes of stones required)
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Direct heating element-to-stone contact
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Large exposed stone surface for gentle, even heat
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Stainless steel construction and industrial-grade elements
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SGS listed for safety and quality
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Dimensions: 15.4" W x 13.2" D x 23.3" H (390 x 335 x 590 mm)
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Designed and handcrafted in Estonia
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Limited 5-Year Warranty (excluding elements)
UKU Control System (choose Local or Wi-Fi)
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Sleek black control panel (additional color options available)
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Adjustable on/off, temperature, delay timer, and scheduling
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Temperature range: 104°F to 230°F
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Delayed start up to 48 hours
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Optional built-in Wi-Fi for remote control via HUUM app
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Can be installed inside or outside the sauna
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Smart heating function available
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Displays both set and current room temperatures
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Safety features: overheat protection, child lock, door sensor
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Supports lighting and ventilation control
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Multilingual interface (EN, DE, RU, IT, FI, EE, PL, FR)
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Console Dimensions: 2.2" W x 0.9" D x 4.1" H (55 x 22 x 105 mm)
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Main Module: 3.5" W x 2.3" D x 5.6" H (90 x 58 x 142 mm)
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5-Year Limited Warranty
HUUM Stones 24
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132 lbs of olivine diabase sauna stones
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Rounded stones improve airflow and visual appeal
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Excellent heat retention and steam generation
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Stone size: 2" – 4" (5 – 10 cm)
What’s Included:
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DROP 4.5kW Sauna Heater
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Wall-mount bracket
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Installation and operation manual
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UKU Control System (console, module, sensors, cables)
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132 lbs of Olivine Sauna Stones
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5-Year Limited Warranty (excluding elements)
Stones 24
- 132 lbs of 2" - 4" (5-10 cm) round Olivine sauna stones
Specifications
Model | DROP 4.5STU Pkg |
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Model | DROP 4.5 |
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Kilowatt Rating | 4.5kW |
Minimum Cubic Feet | 106 CF |
Maximum Cubic Feet | 247 CF |
Heater Weight | 24 lbs |
Shipping Weight with Sauna Stones | 146 lbs |
240V, Single Phase Amperage | 18.8 Amps |
Circuit Breaker Amperage | 30 Amps |
Wire Size | 10 AWG |
Width | 15.4"W (390mm) |
Depth | 13.2"D (335mm) |
Height | 23.3"H (590mm) |
UKU | |
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Minimum Temperature Setting | 104 F |
Maximum Temperature Setting | 230 F |
Shipping Weight | 20 lbs |
Console Dimensions | |
Width | 2.2" (55mm) |
Depth | 0.9" (22mm) |
Height | 4.1" (105mm) |
Main Module Dimensions | |
Width | 3.5" (90mm) |
Depth | 2.3" (58mm) |
Height | 5.6" (142mm) |
Display Panel Cable | |
Length | 9.8 ft |
AWG | 22 |
Temp Sensor Cable | |
Length | 16.4 ft |
AWG | 24 |
Door Sensor Cable | |
Length | 16.4 ft |
AWG | 24 |
Shipping
For more information, feel free to contact us at: contact@radiantdollhealth.com
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