HUUM CLIFF Mini 3.5 Sauna Heater – 3.5kW

Elegant & Long-Lasting Steam, Perfect for Smaller Saunas

The HUUM CLIFF Mini 3.5 is a compact wall-mounted electric sauna heater, specifically designed for small home sauna rooms ranging from 124 to 212 cubic feet. With exceptionally short safety distances—just 2 inches from the walls—the CLIFF Mini makes efficient use of tight spaces without sacrificing performance.

Despite its compact size, the CLIFF Mini 3.5 offers a large stone capacity of 132 pounds (60 kg), producing a soft, consistent heat that enhances both wet and dry sauna sessions. Built with durable stainless steel and industrial-grade heating elements, the unit is engineered to deliver years of reliable operation. Its stones are placed directly against the heating elements for efficient heat transfer and long-lasting steam.

Precision-crafted in Estonia, HUUM sauna heaters are SGS Listed for quality and safety. The CLIFF Mini 3.5 is fully serviceable and backed by a 5-year limited warranty (excluding heating elements).

Key Features

Design and Build

• Slim, compact stainless steel construction

• Wall-mounted installation for space-saving design

• Holds up to 132 lbs (60 kg) of stones

• Internal air duct speeds up heating by 25%

Performance

• Power: 3.5 kW

• Sauna size: 124 – 212 cu. ft. (3.5 – 6 m³)

• Consistent, soft heat suitable for wet or dry use

• Direct stone-to-element contact for efficient heating

Controls

• Requires HUUM UKU control unit (sold separately)

• Options: UKU Local, UKU Wi-Fi, or UKU Glass Wi-Fi

• Features include adjustable temperature, timers, and remote operation via HUUM mobile app

Certification and Warranty

• SGS Listed for safety and quality

• Precision-made in Estonia

• Backed by a 5-year limited warranty (excluding elements)

Sauna Stones

• Not included with the heater

• Recommended: rounded olivine diabase stones (5–10 cm)

• Rounded stones enhance steam softness and complement the design

• Decorative stones are not recommended, as they may crack under heat

Package Contents

• HUUM CLIFF Mini 3.5 sauna heater

• Installation and operation manual

Specifications

• Model: CLIFF Mini 3.5

• Power: 3.5 kW

• Sauna size: 124 – 212 cu. ft.

• Heater weight: 33 lbs

• Shipping weight with stones: 166 lbs

• Voltage: 240V, single-phase

• Amperage: 15A

• Circuit breaker: 15A

• Wire size: 14 AWG

• Dimensions: 10.6"W (270mm) × 6.3"D (160mm) × 38.4"H (975mm)

• Safety distances: A = 2", B = 16.5"