Features
HUUM DROP 4.5 kW 240V Electric Sauna Heater
- Unique water drop design
- 240V/1PH operation
- For sauna rooms from 106 to 247 cu. ft.
- Works with UKU controls (sold separately)
- 122 pound stone capacity (required 4 boxes sold separately)
- Direct contact between stones and heating elements
- More exposed stones create a longer and milder heat
- Stainless steel construction
- Stainless steel, industrial quality heating elements
- Wall-mounted design
- Designed, engineered, and made in Estonia
- Dimensions: 15.4"W (390mm) x 13.2"D (335mm) x 23.3"H (590mm)
- SGS Listed
- Limited 3-year residential warranty and limited 1-year commercial warranty (excluding elements)
Specifications
| HUUM DROP 4.5 Specifications |
| Model Name |
DROP 4.5 |
| Kilowatt Rating |
4.5 KW |
| 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) |
Includes
HUUM DROP 4.5 kW 240V Electric Sauna Heater
- 4.5kW sauna heater
- Wall-mount bracket
- Installation and operation manual
- 3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)
Manual
HUUM DROP 4.5 kW 240V Electric Sauna Heater
Description
HUUM DROP 4.5 kW 240V Electric Sauna Heater
The HUUM Drop 4.5kW is an award-winning electric sauna heater that redefines what authentic sauna heat should feel like. Designed, engineered, and crafted in Estonia, the birthplace of modern sauna culture, this heater combines stunning aesthetics with exceptional steam quality.
Its unique low-metal design maximizes stone capacity, holding an impressive 122 pounds of sauna stones that radiate gentle, consistent heat. Perfect for home saunas ranging from 106 to 247 cubic feet, the HUUM Drop 4.5kW brings professional-grade performance to residential spaces. Whether you're building a new sauna or upgrading an existing one, this heater delivers the authentic experience that sauna enthusiasts demand.
Why the HUUM Drop 4.5kW is an Expert-Recommended Electric Sauna Heater
The HUUM Drop 4.5 kW stands out in the crowded market of sauna heaters for good reason. This electric sauna heater earned the prestigious Red Dot Award for its innovative design — a recognition given only to products that represent excellence in form and function. The Drop combines striking design with top-tier performance, delivering both style and exceptional functionality.
What makes this HUUM sauna heater truly special is its Estonian heritage. Designed, engineered, and crafted in Estonia, the Drop carries forward centuries of sauna tradition while incorporating modern technology.
The sauna heater 4.5 kW output is perfectly calibrated for residential use, providing enough power to heat effectively while maintaining energy efficiency. At Sauna Heaters, we've tested countless models, and the Drop consistently receives top marks from both our team and our customers. For those exploring different options, you can browse our complete collection of sauna heaters to compare features and capabilities.
Superior Steam Quality
The magic of the HUUM Drop sauna heater lies in its revolutionary approach to heat distribution. Traditional electric heaters expose metal elements directly, creating harsh, dry heat that can feel uncomfortable. The Drop takes a completely different approach, inspired by wood-fired saunas.
With its massive 122 lbs stone capacity, the Drop stores and radiates heat primarily through stone rather than metal. This creates what sauna purists call "soft heat" — gentle, enveloping warmth that penetrates deeply without feeling aggressive. When you throw water on these stones, the resulting steam is smooth and consistent, not the sharp burst you get from metal-heavy designs.
The low-metal-mass design means the heating elements work behind the scenes, transferring their energy to the stones rather than radiating it directly into the room. This recreates the principle of traditional saunas, where stones are heated first and then warm the users. The result is a more authentic, comfortable experience that lets you enjoy longer sessions without discomfort.
Unpacking the Red Dot Award-Winning Design and Build
The Red Dot Award is a globally renowned design competition that honors products excelling in both visual appeal and practical performance. The 4.5 kW sauna heater earned this recognition through its sculptural, nature-inspired form.
The Drop's curved shape, resembling a water droplet frozen in time, creates a visual centerpiece that elevates your sauna's aesthetic. But this isn't style over substance. The wall mounted sauna heater design serves practical purposes: it maximizes floor space, improves heat circulation, and makes installation in tight spaces much easier.
Built from durable stainless steel construction, the Drop stands up to the extreme temperature swings and humidity levels that destroy lesser heaters. The industrial-quality elements are engineered for longevity, and the entire unit is sealed against moisture infiltration. Every weld, every curve, every component reflects HUUM's commitment to manufacturing excellence.
Technical Specification and Sizing Guide for the HUUM Drop 4.5kW
Understanding the technical requirements of the Huum Drop 4.5 kW ensures you'll achieve optimal performance and safety. This heater is engineered for specific electrical parameters and sauna room volumes, and matching these specifications is crucial for both efficiency and longevity.
The 106 to 247 cubic foot range represents the heater's effective heating capacity. Smaller rooms heat faster and maintain temperature more easily, while larger rooms near the maximum capacity require longer preheat times. The 4.5kW output provides the perfect balance — enough power for comfortable residential saunas without the electrical demands of larger commercial units.
Before purchasing, measure your sauna carefully and consider any factors that might affect heating efficiency. For additional options in the HUUM lineup, explore our HUUM Drop sauna heaters collection to find the perfect size for your space.
Electrical Requirements and SGS Safety Standards
Understanding the electrical specifications is essential for safe installation.
SGS is an internationally recognized testing organization, and their certification confirms that the HUUM Drop meets strict standards for electrical safety, temperature limits, and material quality. This certification confirms that the heater functions safely and reliably even at temperatures as high as 230°F.
The dedicated 30-amp circuit is non-negotiable — sharing circuits with other appliances creates fire hazards and can damage the heater. The 10 AWG wire specification ensures the wiring can handle the amperage without overheating.
HUUM Mobile App
Modern sauna ownership means modern convenience, and the UKU Wi-Fi control system transforms the HUUM Drop sauna heater into a smart appliance. Our team has verified it under real-world conditions, and installation is simple, taking roughly 15 minutes with just a smartphone and a reliable Wi-Fi connection.
The HUUM mobile app puts complete control in your pocket. Heading home from the gym? Start your sauna remotely so it's perfectly heated when you arrive. The app's scheduling feature lets you set regular sauna times. Imagine having your sauna automatically warm up every evening at 7 PM without touching a button.
FAQs
HUUM DROP 4.5 kW 240V Electric Sauna Heater
Does the HUUM Drop 4.5 kW come with the stones?
No, the HUUM Drop 4.5 kW does not include stones. You'll need to purchase 122 lbs stones separately. This approach allows you to select the specific stone type and quality you prefer. Stones are typically sold separately because they're heavy and fragile, making shipping them with the heater impractical.
Can I control the HUUM Drop 4.5 kW remotely with my phone?
Yes, when equipped with the UKU Wi-Fi control package, you can control the heater remotely through the HUUM mobile app. This enables pre-heating your sauna before you arrive home, scheduling regular heating times, adjusting temperature remotely, and activating safety features like the child lock.
What is the maximum size room for the HUUM Drop 4.5 kW?
The maximum effective room size is 247 cu. ft. However, this assumes good insulation, minimal glass, and standard ceiling heights. Rooms with large glass doors, exterior walls, or poor insulation may require adjustment to this calculation.
What is the benefit of the HUUM Drop's low-metal design?
The HUUM Drop’s low-metal design offers a sauna experience that emphasizes comfort and traditional-style heat:
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Superior Steam Quality: Most of the heat comes from the 122 lbs of stones, not metal, creating gentle, consistent steam.
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Soft, Enveloping Heat: Recreates the sensation of a traditional wood-fired sauna for a more authentic experience.
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Comfort for Longer Sessions: The gentle warmth allows you to enjoy extended sauna sessions without discomfort.
Overall, the low-metal design enhances both the quality of the steam and the overall sauna experience.
What kind of stones are recommended for the HUUM Drop 4.5kW?
Rounded olivine diabase stones in the 2-4 inch (5-10 cm) size range are ideal for the HUUM Drop. These volcanic stones withstand extreme temperature cycling without breaking down rapidly.
Avoid using river rocks or any stones not explicitly rated for saunas, as they may crack or explode when heated.
What are the required safety distances for wall installation?
The HUUM Drop requires a minimum of 4 inches (100 mm) clearance from side walls for this wall mounted sauna heater. Front clearance typically requires at least 8-10 inches of unobstructed space. These minimum distances ensure proper ventilation and prevent fire hazards.
Is a separate safety railing available or required?
A custom wooden Drop heater guard rail is optional but highly recommended, especially in family saunas or commercial installations. The guard rail prevents accidental contact with the hot heater body and stones while complementing the HUUM Drop sauna heater's sculptural design.
Does the HUUM Drop 4.5 kW have a maximum temperature limit?
Yes, the HUUM Drop 4.5 kW can reach maximum temperatures up to 230°F, which is higher than many competitors. This capability is enabled by adherence to SGS standards and robust construction.
What gauge wire and circuit breaker are necessary for the 240V installation?
The electric sauna heater requires a dedicated 30 Amp circuit breaker and a minimum of 10 AWG wire size. These specifications are mandatory. Using a smaller wire or an inadequate breaker creates fire hazards and will void your warranty.
How does the HUUM Drop compare to other 4.5 kW heaters?
The 4.5 kW sauna heater comparison reveals that the Drop's massive stone volume (122 lbs vs. 40-60 lbs for most competitors) and Red Dot Award-winning aesthetic are core differentiators. While other heaters focus on compact size, the Drop prioritizes steam quality and authentic heat.
What is the warranty coverage for the heater and the heating elements?
The HUUM Drop includes a 5-year limited warranty covering manufacturing defects, structural components, and control systems. However, heating elements are explicitly excluded as they are considered consumable parts. Element lifespan varies based on usage frequency and maintenance practices.
