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Description
The Huum CLIFF is a slim stainless steel tower electric sauna heater from Estonia, built around a tall stone cage that holds about 165 lb of stones. Its 10.6 by 10.6 inch footprint fits compact home saunas of 177 to 566 cubic feet, and it can stand in a corner or be embedded in a bench. This package pairs it with a Huum UKU control and sauna stones.
Tall stone cage
The stones wrap the stainless steel elements in direct contact, and removable ribs make stacking easier. A large stone mass gives softer, longer lasting heat for steam when you pour water.
Small footprint
At 10.6 by 10.6 inches and 38.4 inches tall, the CLIFF uses little floor space. The 6kW model needs only 2.36 in of side clearance per Huum's manual.
Specifications (Huum)
- Model: Huum CLIFF 6 (H1004012), CLIFF 9 (H1004022), CLIFF 11 (H1004032)
- Output and room size (240V): 6kW: 177 to 318 cu ft; 9kW: 283 to 460 cu ft; 10.5kW: 354 to 566 cu ft
- Electrical: 240V single phase; 6kW: 25A, 30A breaker; 9kW: 37.5A, 50A breaker; 10.5kW: 43.75A, 50A breaker
- Stones: Holds about 165 lb (75 kg) of 1.2 to 2 in stones
- Size: 10.6 x 10.6 x 38.4 in (W x D x H)
- Weight: 6kW and 9kW: 35.2 lb; 10.5kW: 37.5 lb
- Side clearance: 6kW: 2.36 in; 9kW: 9.45 in; 10.5kW: 15 in; see the manual for full distances
- Material: Stainless steel
- Control: Huum UKU digital control, included in this package
- Certification: SGS listed, per Huum
- Made in: Estonia
What you need to know before buying
- This is a hardwired 240V heater. A licensed electrician must install it and the UKU control per the manual and local code. Huum recommends connecting it without a GFCI breaker.
- Pick the output by room volume. Add 3.3 cu ft for each sq ft of uninsulated glass, tile, brick or stone wall.
- The CLIFF uses small 1.2 to 2 in stones and Huum recommends a specialist stack them; stacking too tightly can overheat the elements.
- The CLIFF is fixed to the floor with brackets. Clearances grow with output, so check the 9kW and 10.5kW distances before you plan the room.
In the box
Huum CLIFF heater with floor brackets, 2 blocks for removing the ribs, installation and operation manual, a Huum UKU digital control, and sauna stones.
Compare
Smaller room? See the wall-mounted Huum Cliff Mini 4. Prefer a box shape? See the Huum Core Black or the Huum Drop.
Warranty
30-day limited warranty against manufacturing defects.
Returns
Returns are accepted within 30 days of delivery for unused, unopened items in the original packaging, with our written approval first. A 25% restocking fee applies, you pay return shipping, and original shipping is non-refundable. Note any shipping damage on the delivery receipt and send us photos right away.
Why buy from Restore Suite
Financing is available at checkout. Questions before you buy? Talk to a real person.
Related
Browse all sauna heaters and electric sauna heaters, check your circuit with the sauna breaker size calculator, or read our sauna installation guide.
Sauna use is intended for general relaxation and wellness, not to treat any condition. If you are pregnant, have a heart condition, low blood pressure or another health concern, talk with your doctor before use. Follow the manufacturer's installation clearances and electrical requirements.
Specifications
| Model | Huum CLIFF 6 (H1004012), CLIFF 9 (H1004022), CLIFF 11 (H1004032) |
|---|---|
| Output and room size (240V) | 6kW: 177 to 318 cu ft; 9kW: 283 to 460 cu ft; 10.5kW: 354 to 566 cu ft |
| Electrical | 240V single phase; 6kW: 25A, 30A breaker; 9kW: 37.5A, 50A breaker; 10.5kW: 43.75A, 50A breaker |
| Stones | Holds about 165 lb (75 kg) of 1.2 to 2 in stones |
| Size | 10.6 x 10.6 x 38.4 in (W x D x H) |
| Weight | 6kW and 9kW: 35.2 lb; 10.5kW: 37.5 lb |
| Side clearance | 6kW: 2.36 in; 9kW: 9.45 in; 10.5kW: 15 in; see the manual for full distances |
| Material | Stainless steel |
| Control | Huum UKU digital control, included in this package |
| Certification | SGS listed, per Huum |
| Made in | Estonia |
Specifications from the manufacturer. Dimensions are approximate.
Shipping
We ship to the 48 contiguous U.S. states and Washington, DC. Your shipping cost is calculated at checkout and shown before you pay.
You will get an order confirmation right away and tracking by email when your order ships. Questions about timing for a specific item? Call (945) 280-3243 or email support@restoresuite.com before you order.
Delivery
Large items such as saunas, hot tubs and cold plunge tubs usually ship by freight. The carrier contacts you to schedule delivery. Please check the packaging and note any damage on the delivery receipt before you sign, then tell us within 48 hours so we can resolve it for you.
Before delivery day, measure doorways and hallways along the path to the install spot, and confirm the electrical requirement on the Specifications tab.
Warranty
30-day limited warranty against manufacturing defects
If this item has a manufacturing defect within 30 days of purchase, contact us with your order number and a photo or video of the issue and we will make it right.
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Manuals and documents
Official Huum documents for this model. Opens as a PDF.

Why this heater
A slim stainless steel tower electric sauna heater that holds about 165 lb of stones, 6 to 10.5kW, packaged with a UKU control and stones.
- 6, 9 or 10.5kW for rooms of 177 to 566 cu ft.
- Slim 10.6 x 10.6 in footprint, 38.4 in tall.
- Holds about 165 lb of stones.
- Includes a Huum UKU control and stones.

Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
- Output and room size (240V)
- 6kW: 177 to 318 cu ft; 9kW: 283 to 460 cu ft; 10.5kW: 354 to 566 cu ft
- Electrical
- 240V single phase; 6kW: 25A, 30A breaker; 9kW: 37.5A, 50A breaker; 10.5kW: 43.75A, 50A breaker
- Size
- 10.6 x 10.6 x 38.4 in (W x D x H)
- Weight
- 6kW and 9kW: 35.2 lb; 10.5kW: 37.5 lb
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- The CLIFF needs about 165 lb of small 1.2 to 2 in stones, and stacking them takes time; Huum recommends a specialist.
- Huum's US manual lists the CLIFF 11 at 11.0kW while Huum's product page lists 10.5kW; both give 43.75A at 240V.
- Electric sauna heaters must be installed by a licensed electrician per the manual and local code.
Not sure this is the right fit? Ask us or call (945) 280-3243.
Compare Huum models
Swipe to compare 4 models
Huum Drop Wall Mount Sauna Heater with UKU Controller & StonesFrom $2,716.00
- Stone capacity
- 122 lb
Huum Hive Flow Mini 8.5kW Wood-Burning Sauna Stove with Ash Drawer & Sauna Stones$3,339.00
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