Sauna Heater | HUUM CLIFF Mini Series 3.5kW
- Authorized Retailer of HUUM
- Full Manufacturer Warranty Included — 3-Year Residential
- SGS-Listed Sauna Heater
- Secure Checkout
- U.S.-Based Customer Support
- Free Freight Shipping to the Contiguous U.S.
HUUM CLIFF Mini 3.5kW Electric Sauna Heater — Wall-Mounted
Compact Wall-Mounted Sauna Heater for Rooms 106–177 cu ft | ~132 lb Stone Capacity | Made in Estonia
The HUUM CLIFF Mini 3.5kW is a compact wall-mounted electric sauna heater designed for small residential sauna rooms from 106 to 177 cubic feet. Its slim, vertical profile delivers the same CLIFF Series internal air duct design and removable rib system in a wall-mounted format — with reduced safety clearance requirements for tight installations.
Manufactured in Estonia from stainless steel, the CLIFF Mini holds approximately 132–133 lbs of sauna stones for consistent heat distribution and steam production. A compatible HUUM UKU control system and sauna stones are required for operation and are sold separately.
Who This Is For
The HUUM CLIFF Mini is the smallest model in the CLIFF Series and the only wall-mounted CLIFF — ideal for 1–2 person sauna rooms, compact barrel saunas, and small custom builds under 180 cubic feet. It’s a strong choice when you want the CLIFF’s slim vertical design and high stone-to-output ratio in a wall-mounted format.
Key Features
- 3.5kW wall-mounted electric output — designed for sauna rooms 106–177 cu ft
- Slim vertical design — reduced safety clearance requirements
- ~132–133 lb stone capacity for consistent heat retention and steam (löyly)
- Internal air duct design for efficient heat distribution
- Removable ribs for optimized stone placement
- Direct contact between heating elements and stones
- 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: CLIFF Mini 3.5
- SKU: H1005012
- Series: CLIFF Mini Series
- Power Output: 3.5kW
- Voltage: 240V, Single Phase
- Amperage: 14.58A
- Room Size: 106–177 cu ft
- Stone Capacity: ~132–133 lbs
- Width: 10.6”
- Depth: 6.3”
- Height: 38.4”
- Heater Weight: 33 lbs
- Shipping Weight (with stones): 165 lbs
- Country of Origin: Estonia
Required Components Sold Separately
- Sauna Control (required): HUUM UKU Wi-Fi Sauna Control
- Sauna Stones (required): ~132–133 lbs (4 boxes) — HUUM Sauna Heater Stones recommended
- Electrical Service (required): 240V / 1-phase / 14.58A — consult a licensed electrician
What’s Included
- HUUM CLIFF Mini 3.5kW Sauna Heater
- 2 prop blocks (for removal of sauna rib slats)
- 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 / 14.58A circuit — 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
- Removable ribs allow for optimized stone placement — use prop blocks included in the box
- 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 CLIFF Mini 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. View Full Warranty Details.
Manuals & Documentation
Complete Your Sauna Setup
Everything you need to complete your HUUM CLIFF Mini sauna setup.
- HUUM UKU Wi-Fi Sauna Control — required
- HUUM Sauna Heater Stones — 4 boxes required (~132–133 lbs)
- SaunaLife Model X2 Indoor Sauna Kit — 1–2 person indoor sauna (125 cu ft)
- Shop All Sauna Heaters
FAQ
What size sauna room does the CLIFF Mini support?
The CLIFF Mini is rated for sauna rooms from 106 to 177 cubic feet — the smallest room size in the CLIFF Series. It’s ideal for 1–2 person sauna rooms and compact builds. Use the HUUM Sizing Guide to confirm fit.
Is the CLIFF Mini wall-mounted or floor-standing?
The CLIFF Mini is wall-mounted — the only wall-mounted model in the CLIFF Series. The CLIFF 6kW, 9kW, and 11kW are all floor-standing.
How does the CLIFF Mini differ from the DROP 4.5kW?
Both are wall-mounted heaters for small rooms, but the CLIFF Mini has a slim vertical profile with ~132 lb stone capacity and removable ribs, while the DROP 4.5kW has a rounded droplet form with ~122 lb stone capacity. The CLIFF Mini covers 106–177 cu ft vs. 106–248 cu ft for the DROP 4.5kW.
What are the removable ribs for?
The CLIFF’s rib slats can be removed to optimize stone placement and airflow. Use the included prop blocks to safely remove the ribs during stone loading.
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 this ship for free?
Yes — free freight shipping is included to the contiguous United States.
Choose options
Sauna Heater | HUUM CLIFF Mini Series 3.5kW Review Summary
What people like
Pros
- Space-saving design: Its slim, vertical profile is perfect for small sauna cabins where floor space is limited.
- High stone capacity: Despite its small size, it holds a large amount of stones to produce a soft and long-lasting steam.
- Short safety distances: The design allows for installation very close to walls, maximizing the usable area inside the sauna.
- Modern aesthetic: The sleek stainless steel look is highly regarded by homeowners looking for a contemporary feel.
Cons
- Controller sold separately: The unit typically requires the purchase of a specific external control system, which adds significantly to the total cost.
- Stones not included: Many retailers do not include the specialized rounded stones in the base price, requiring an additional purchase.
- Longer heat-up time: Because of the high stone mass relative to the power output, it can take longer to reach the desired temperature compared to heaters with fewer stones.
- Complex stone packing: Users have noted that carefully layering the stones is critical to prevent damage to the heating elements and ensure proper airflow.
Powered by OneReview