HUUM Sauna Heater DROP Series 4.5kW
HUUM DROP 4.5kW Electric Sauna Heater
Wall-Mounted Electric Sauna Heater for Rooms 106–248 cu ft | 122 lb Stone Capacity | Made in Estonia
The HUUM Sauna Heater DROP 4.5kW is a wall-mounted electric sauna heater designed for residential sauna rooms from 106 to 248 cubic feet. Its distinctive rounded form — inspired by the natural shape of a water droplet — holds approximately 122 lbs of sauna stones for consistent heat distribution and satisfying steam production.
Manufactured in Estonia from stainless steel with industrial-grade heating elements, the DROP features direct contact between elements and stones for efficient heat transfer. A compatible HUUM UKU control system and sauna stones are required for operation and are sold separately.
Who This Is For
The HUUM DROP 4.5kW is the smallest model in the DROP Series — ideal for compact home saunas, 1–2 person sauna rooms, and smaller sauna builds where the iconic droplet design is desired. It’s a great fit for barrel saunas, small indoor sauna rooms, and custom builds under 250 cubic feet.
Key Features
- 4.5kW wall-mounted electric output — designed for sauna rooms 106–248 cu ft
- Rounded droplet-inspired design — a visual centerpiece in any sauna
- ~122 lb stone capacity for consistent heat retention and steam (löyly)
- Direct contact between heating elements and stones for efficient heat transfer
- Industrial-grade stainless steel heating elements
- Stainless steel construction
- Compatible with HUUM UKU Wi-Fi Sauna Control (sold separately)
- SGS listed — meets U.S. safety standards
- 3-year residential warranty / 1-year commercial warranty
- Designed, engineered, and manufactured in Estonia
Specifications
- Model: DROP 4.5
- SKU: H1001052
- Series: DROP Series
- Power Output: 4.5kW
- Voltage: 240V, Single Phase
- Amperage: 18.75A
- Wire Size: 10 AWG
- Room Size: 106–248 cu ft
- Stone Capacity: ~122 lbs
- Width: 15.4”
- Depth: 13.2”
- Height: 23.3”
- Heater Weight: 24 lbs
- Shipping Weight (with stones): 146 lbs
- Circuit breaker: Refer to Installation Manual
- Country of Origin: Estonia
Required Components Sold Separately
- Sauna Control (required):HUUM UKU Wi-Fi Sauna Control
- Sauna Stones (required): ~122 lbs (4 boxes) — HUUM Sauna Heater Stones recommended
- Electrical Service (required): 240V / 1-phase / 18.75A with 10 AWG wiring — consult a licensed electrician
What’s Included
- HUUM DROP 4.5kW Sauna Heater
- Wall-mount bracket
- Installation and Operation Manual
Shipping & Delivery
This product ships free to the contiguous United States. Please inspect your shipment upon arrival and note any visible damage before signing.
Installation Notes
- Requires a dedicated 240V / 1-phase / 18.75A circuit with 10 AWG wiring — consult a licensed electrician
- A compatible HUUM UKU control system is required and must be installed separately
- Sauna stones must be loaded per manufacturer specifications before first use
- Observe all safety clearance distances per the Installation & Operation Manual
- Review the Element Requirements document before purchase to confirm electrical compatibility
- For indoor sauna use only unless otherwise specified by the manufacturer
- Professional installation strongly recommended
Warranty
The HUUM DROP includes a 3-year limited residential warranty and a 1-year limited commercial warranty (excluding heating elements), provided by the manufacturer. As an authorized HUUM retailer, Prime Regeneration ensures full warranty coverage is passed through to you at the time of purchase.
Manuals & Documentation
Product Videos
Installation Overview:
Stone Placement Guide:
Why Choose HUUM:
Complete Your Sauna Setup
Everything you need to complete your HUUM DROP sauna setup.
- HUUM UKU Wi-Fi Sauna Control — required
- HUUM Sauna Heater Stones — 4 boxes required (~122 lbs)
- Kohler C1 Indoor Sauna Kit — up to 5-person indoor sauna (224 cu ft)
- SaunaLife Model G2 Outdoor Sauna Kit — 4-person outdoor sauna (184 cu ft)
- Shop All Sauna Heaters
FAQ
What size sauna room does the DROP 4.5kW support?
The DROP 4.5kW is rated for sauna rooms from 106 to 248 cubic feet — making it the smallest model in the DROP Series and ideal for compact 1–2 person sauna rooms. Use the HUUM Sizing Guide to confirm fit.
How does the 4.5kW compare to the other DROP models?
The 4.5kW is the entry-level DROP, covering 106–248 cu ft at 18.75A / 10 AWG. The 6kW covers 177–318 cu ft (25A / 10 AWG), the 7.5kW covers 230–441 cu ft (31.25A / 8 AWG), and the 9kW covers 283–460 cu ft (37.5A / 8 AWG). All share the same dimensions and ~122 lb stone capacity.
Does it come with a control?
No — a compatible HUUM UKU control system is required and sold separately. The HUUM UKU Wi-Fi Sauna Control is the recommended option.
Does it come with sauna stones?
No — approximately 122 lbs (4 boxes) of sauna stones are required and sold separately. HUUM Sauna Heater Stones are recommended.
What electrical connection is required?
The DROP 4.5kW requires a dedicated 240V / 1-phase / 18.75A circuit with 10 AWG wiring. Consult a licensed electrician before installation.
Does this ship for free?
Yes — free freight shipping is included to the contiguous United States.
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HUUM Sauna Heater DROP Series 4.5kW Review Summary
What people like
Pros
- Elegant Aesthetic Design: The visually striking shape is a favorite among owners who want a high-end, contemporary look for their wellness space.
- Large Stone Volume: By holding an extensive amount of stones, it delivers a more authentic and gentle steam experience compared to traditional heaters.
- Space-Saving Wall Mount: Its design maximizes available floor space, making it an excellent choice for smaller or more minimalist sauna layouts.
- Smart Control Compatibility: The compatibility with mobile apps provides users with the luxury of preheating their sauna from anywhere.
Cons
- Additional Controller Cost: The necessity of purchasing a separate control unit and power relay box significantly increases the total investment required for a functional system.
- Precise Stone Placement: Owners report that arranging the stones is a tedious process that is critical for airflow and protecting the internal components.
- Heating Element Fragility: There have been reports of the internal elements warping or failing prematurely if the stones are not packed correctly or if they settle over time.
- Complex Electrical Installation: The specific wiring requirements and external control configurations usually necessitate hiring a professional electrician for a safe setup.
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