HUUM DROP 4.5 (4.5 kW) Electric Sauna Heater

Elevate your home wellness sanctuary with the award-winning HUUM DROP 4.5, a high-performance electric heater inspired by the purest element in nature—a drop of water. This sculptural, wall-mounted heater combines modern Estonian design with professional-grade thermal engineering, softening the angular lines of a traditional sauna while providing a superior thermal experience. Recognized with the prestigious Red Dot Award, the DROP 4.5 is as much a piece of art as it is a powerful spa appliance.

Designed specifically for compact residential saunas, the DROP 4.5 maximizes floor space while offering a stone capacity that rivals most wood-burning stoves, ensuring soft, long-lasting steam (Loyly).

Sculptural Space-Saving Design

The DROP 4.5 is engineered specifically for wall mounting, freeing up valuable floor space in your sauna. Its unique rounded silhouette is not only aesthetically pleasing but functional, allowing for efficient heat radiation from all sides. This minimalist approach brings a touch of organic elegance to custom-built home saunas where style and performance are equally valued.

Superior Thermal Mass & Steam

The HUUM DROP 4.5 holds an impressive 122 lbs (55 kg) of stones, providing a thermal mass far exceeding standard wall-mounted heaters. This high stone capacity ensures that the heater maintains a consistent climate and produces a deep, rich steam when water is ladled over the rocks. The open-cage design allows air to circulate through the stone pile, resulting in a milder and more natural heat that avoids the harsh, dry feel of traditional boxy heaters.

Durable Stainless Steel Craftsmanship

Each HUUM heater is precision-crafted in Estonia using high-grade stainless steel and industrial-quality heating elements for maximum durability and corrosion resistance. The elegant cage structure is designed to hold the stones securely while allowing the heating elements to radiate warmth directly into the room, ensuring a safe and reliable performance for years to come.

Easy Operation & Smart Integration

Designed for the modern home, the DROP 4.5 operates on a standard 240V 1-phase connection (30 amp). It is intended to be paired with an external control system, such as the HUUM UKU series, which allows for precise temperature management. With the UKU Wi-Fi option, you can preheat your sauna directly from your smartphone via the HUUM mobile app, ensuring your sanctuary is ready exactly when you are.

Features

• Award-Winning Design: Red Dot Award-winning "water drop" aesthetic.

• Wall-Mounted Efficiency: Frees up floor space for a cleaner sauna interior.

• High Stone Capacity: Holds 122 lbs of stones for unparalleled steam production.

• Premium Stainless Steel: Durable and rust-resistant Estonian craftsmanship.

• Soft & Lasting Heat: Open-cage design provides a milder, more natural thermal experience.

• Compact Footprint: Perfect for small residential saunas under 247 cubic feet.

• Smart Control Ready: Compatible with HUUM UKU local or Wi-Fi controllers.

Specifications

• Power Output: 4.5 kW.

• Sauna Room Size: 106 – 247 cubic feet (3 – 7 m³).

• Stone Capacity: 122 lbs (55 kg).

• Dimensions: 15.4" W x 13.2" D x 23.3" H.

• Electrical: 240V, 1-phase, 18.8 Amps (30 amp breaker, 10 AWG wire).

• Weight: Approx. 24 lbs without stones.

• Warranty: 3-Year Limited Residential Warranty (elements excluded).

Required & Recommended Accessories

• UKU Control System: Required for operation (Local or Wi-Fi versions available).

• Rounded Stones: HUUM recommends rounded olivine diabase stones for optimal airflow.

• DROP Safety Railing: Light wood arcs that protect bathers from accidental contact.

• DROP Embedding Flange: Allows for a clean finish if partially installing the heater into benches.