HUUM CLIFF Electric Sauna Heater

Important Safety Information

ATTENTION! Electrical works must be carried out by a licensed electrician.

ATTENTION! We recommend a specialist to lay the stones on the heater.

ATTENTION! This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless supervised by a responsible person.

ATTENTION! Children should be supervised to ensure they do not play with the appliance.

ATTENTION! For public saunas without a timer, a pilot lamp indicating the heater is on must be installed in the attendant's room.

Safety is based on EN 60335-2-53: 2011.

Delivery Set

• Electric heater
• Installation and operation manual
• 2 blocks for disassembling sauna stove slats

ATTENTION! HUUM CLIFF requires a control panel and stones for complete installation.

Read this manual carefully before use. It is intended for sauna owners, maintenance personnel, and electricians.

ATTENTION! Electrical work must be performed by a licensed electrician.

Before Installation

Read the manual thoroughly. Do not install or maintain if instructions are unclear. Contact your vendor or distributor for questions.

• Verify heater output (kW) matches sauna room volume (ft³/m³). See Table 1-2.
• Add 3.3 ft³ (1 m³) to sauna volume for each 1 ft² (1 m²) of uninsulated brick, tile, or glass walls.
• Incorrect dimensioning voids the warranty.
• Refer to Table 3 for minimal safe distances to ceiling and walls.
• CLIFF 6, 9, 11 models attach to the floor with provided brackets. Install bracket to heater leg and fix to floor with a suitable screw (min. 6 x 40mm).

Diagram: Heater dimensions and mounting bracket. Shows minimum ceiling clearance (47.3" / 1200 mm). Illustrates bracket attachment with a 6x40mm screw. Dimensions A, B, H are indicated. Note: CLIFF Mini 4 is wall-mounted with a special bracket.

Technical Specifications

Table 1: Output (240 V)

Table 2: Output (208 V)

Table 3: Dimensions and Weight

Installation

Positioning the Heater

• Position heater to ensure safe distance from flammable materials (see Table 3).
• Prevent physical contact and dangerous situations.
• Stone capacity: CLIFF Mini approx. 132 lb (60 kg); CLIFF approx. 165 lb (75 kg).
• Power cable input is on the bottom cover.

Connecting to the Power Supply

• Install a main disconnect (circuit breaker) before the sauna controller.
• Connection must be by a certified electrician.
• Power cable must comply with UL 62 (US) and CSA 49 (Canada) for UV, water, and oil resistance.
• Connection without a GFCI breaker is recommended.
• Refer to Table 1-2 for max current intensity.
• Secure cable with the cover screw clamp.

ATTENTION! Use only heat-resistant cables. Junction box must be waterproof and located up to 20 inches (50 cm) from the floor.

• Open electrical box cover.
• Connect power cable to terminal block per diagram.
• Close cover.
• Fix cable with a cable strap.

Wiring Diagrams

Diagrams show electrical connections for CLIFF 4 and CLIFF 6/9/11 models, indicating L1, L2, 240V, and 208V terminals.

Fitting the Stones

• Do not bend heating elements when placing stones.
• Ensure sufficient air circulation around elements.
• Wash stones before filling.
• Stack stones sparsely; overcrowding causes overheating and slows heating.
• Stone diameter: 1.2-1.9 in (3–5 cm).
• External stones must be stacked densely, covering elements. Elements must not be visible.
• Ceramic stones are used at user's risk.

ATTENTION! Insufficient stones pose a fire hazard!

ATTENTION! Stone placement by a specialist is recommended.

Diagrams: Illustrate correct (✔️) and incorrect (❌) stone stacking methods.

Removing Heater Ribs

Ribs are removable with props (A) for stone fitting. Steps:

1. Loosen bottom nuts by 5 mm.
2. Insert props between ribs.
3. Carefully remove rib from both ends, right first, then left.

ATTENTION! Remove ribs without force or twisting to avoid bending tenons!

Diagrams: Illustrate rib removal steps.

Reassembly is the reverse process.

Operation

First-time Use

Initial insulation resistance may be lower due to moisture from storage/transport. Moisture evaporates within 1-2 hours of heating.

Controlling the Heater

• Use any certified control panel. Heater output must be within the panel manufacturer's interval.
• Use only with a timer control unit.
• Operating limits: 12h with 6h rest for apartments/hotels; 6h for others, no auto-restart.

Guard Rails

• Recommended: construct a guard rail using low heat capacity, poor thermal conductivity materials.
• If using flammable materials, maintain specified safety clearances.

ATTENTION! Installing too close to flammable constructions increases fire hazard!

Sauna Room Requirements

Wall Insulation

Massive heat-accumulating walls (brick, glass, rendering) need insulation for normal heater output.

Sufficient insulation includes:

• 4 in (min. 2 in / 50 mm) insulation wool layer.
• Reflective material/aluminum foil vapor barrier.
• 0.4 in (10 mm) air gap between vapor barrier and wood paneling.
• 0.5-0.65 in (12-16 mm) thick wood paneling.
• Min. 0.2 in (5 mm) air gap at ceiling panel edges.

Lower ceiling height to 86.6 - 91 in (2200-2300 mm, min. 2200 mm) to optimize heater performance. Insulate ceiling with at least 4 in (100 mm) and panel as described. Use wood for interior surfaces, except heat-resistant walls near the heater.

ATTENTION! Wall insulation requires fire inspector approval. Insulating flues is forbidden!

ATTENTION! Non-flammable insulation (e.g., mineral panels without air gap) can cause dangerous overheating!

Floor

Stone fragments can damage plastic flooring. Use ceramic tiles and dark joint filler under/around the heater to prevent damage.

Ventilation

Ensure sufficient fresh air (6 air changes per hour). System depends on natural or mechanical ventilation.

Ventilation components:

1. Supply air pipe: 50-100 mm (1 31/32"-3 15/16").
2. Exhaust air pipe: 100-200 mm (3 15/16"-7 7/8").
3. Drying pipe: Or leave door open for ventilation after use.

Mechanical Ventilation:

• Supply air: Opposite heater, higher (≥ 400 mm / 15 ¾").
• Exhaust air: Opposite wall (≤ 600 mm / 23 ⅝" from floor).
• Drying pipe opening: Opposite wall, under ceiling.

Natural Ventilation:

• Supply air: Opposite heater, lower (≤ 400 mm / 15 ¾").
• Exhaust air: Opposite wall, 200 mm (7 ⅞") higher than supply air (≤ 600 mm / 23 ⅝" from floor).
• Drying pipe opening: Opposite wall, near heater.

Supply air pipe needs an adjustable valve. Ensure a 4 in (100 mm) gap under the sauna door if exhaust is in the washroom.

Use drying pipe opening for post-sauna cooling or between sessions if humidity is high. Keep it closed during sauna use.

General Warnings

• Check room and heater before operation.
• Ensure heater is correctly filled with stones.
• Do not cover heater (fire hazard).
• Do not touch hot heater (burns).
• Poor ventilation can dry wood, causing fire hazard.
• Use only tap water for steam.
• No water hose for steam.
• Min. 2 in (5 cm) fireproof insulation behind paneling.
• Sauna doors open outwards.
• Do not misuse the sauna.
• Install only one heater per room.
• Undiluted essential oils on stones can ignite.
• Do not leave children unattended.
• Avoid sudden cooling if in poor health; consult a doctor.
• Enjoy sauna comfortably.
• Keep instructions safe.
• Warranty excludes heating elements.

Warranty

General terms: huumsauna.com/warranty

Latest material: huumsauna.com