
Product Information
The HUUM CLIFF 6.0STU Sauna Heater Package is a 6.0kW heater designed for sauna rooms up to 353 cubic feet. Its sleek, space-saving design allows for flexible installation in compact areas.
The package includes a UKU control system (WiFi optional) for precise temperature management. With a large sauna stone capacity, it ensures long-lasting, milder heat.
Made from high-quality stainless steel, it guarantees durability and performance. This all-in-one package provides everything needed for a premium sauna experience.



Product Features
The HUUM CLIFF 6.0STU Sauna Heater Package features a compact, slim design, making it ideal for saunas with limited space.
It heats up 25% faster with an internal air duct and is suitable for sauna rooms from 176 to 353 cubic feet. With a 165-pound stone capacity, direct stone contact ensures longer-lasting, milder heat.
The UKU control system (WiFi optional) offers advanced temperature control, delayed start, and smart heating features for a premium sauna experience.

HUUM CLIFF 6.0STU Pkg CLIFF Series 6.0kW Sauna Heater Package
- Durable Build: High-quality stainless steel construction for long-lasting performance.
- Efficient Heating: Vertical design maximizes heat distribution and energy efficiency.
- Capacity: Designed for sauna rooms ranging from 176 to 353 cubic feet.
- Efficient Heat Distribution: Direct contact between stones and heating elements for longer, milder heat.
What’s Included?
CLIFF 6.0kW Sauna Heater
- 6.0kW sauna heater
- 2 prop blocks (for removal of sauna rib slats)
- Installation and operation manual
- 5-Year limited warranty (excluding elements)
UKU
- Black Control console
- Main control module
- Temperature sensor
- Door sensor
- Control display panel cable
- Temperature sensor cable
- Door sensor cable
- Installation and operation manual
- 5-Year limited warranty
Stones 12
- 165 lbs of 1" to 2" (3-5 cm) round Olivine sauna stones

Additional Features
The HUUM CLIFF 6.0STU Sauna Heater Package offers quick and efficient heating, making it ideal for home
and commercial saunas.
It features a space-saving slim design, removable ribs for precise stone placement, and direct contact
heating elements for a smoother, longer-lasting heat.
Smart UKU controls, Wi-Fi compatibility, safety sensors, and durable stainless steel construction ensure
reliability.

Removable Ribs
Allows for more accurate stone stacking.

Modern Touchscreen Panel
Sleek black display with multiple color options (additional cost).

Temperature Control
Settable 104°F to 230°F range.

Child Safety & Overheat Protection
Ensures secure operation.
About HUUM
HUUM is an innovative Estonian company creating high-quality sauna heaters that blend exquisite design, smart technology, and traditional craftsmanship.
Founded by Siim Nellis, a third-generation sauna stove producer, HUUM draws on decades of expertise and Nordic sauna traditions.
Their award-winning designs, like the DROP heater, prioritize gentle steam, efficiency, and sustainability. Made in Estonia, HUUM brings the authentic sauna experience to the world.


Why Choose Us?
Choose Peak Primal Wellness for a personalized, community-driven approach to health. We prioritize your well-being with high-quality products, tailored solutions, and 24/7 support.
As a family-owned business, we build lasting relationships, offering authentic, effective solutions to help you achieve your wellness goals.
Join our thriving community and embark on a journey toward optimal health with passionate professionals who genuinely care. At Peak Primal Wellness, you're not just a customer—you're family.
Specifications
Brand | HUUM |
SKU | CLIFF 6.0STU |
Model | CLIFF 6.0STU Pkg |
CLIFF 6.0 | |
Kilowatt Rating | 6.0 KW |
Minimum Cubic Feet | 176 CF |
Maximum Cubic Feet | 353 CF |
Heater Weight | 35 lbs |
Shipping Weight with Sauna Stones | 200 lbs |
240V, Single Phase Amperage | -- |
Dimensions (W x D x H) | 10.6" W (270mm) x 10.6" D (270mm) x 38.4" H (975mm) |
UKU | |
Minimum Temperature Setting | 104 F |
Maximum Temperature Setting | 230 F |
Shipping Weight | 20 lbs |
Console Dimensions (W x D x H) | 2.2" W (55mm) x 0.9" D (22mm) x 4.1" H (105mm) |
Main Module Dimensions (W x D x H) | 3.5" W (90mm)x 2.3" D (58mm) x 5.6" H (142mm) |
Display Panel Cable | |
Length | 9.8 ft |
AWG | 22 |
Temp Sensor Cable | |
Length | 16.4 ft |
AWG | 24 |
Door Sensor Cable | |
Length | 16.4 ft |
AWG | 24 |
Manuals | |
Installation and Operational Manual | Cliff IOM |
Spec Sheet | Cliff Spec Diagram |
Elements Required | HUUM ER |
UKU | |
Installation and Operational Manual | UKU IOM |
Install Diagram | UKU Installation HUUM Glass & Mirror Diagram |
Stones | |
Stone Requirment | HUUM SR |
Extension Box | |
Installation Manual | Extension Box IM |
Warranty & Returns
Return Policy
Bathing Brands accepts returns of new, uninstalled items within 30 days of purchase. Contact us
promptly for a Return Authorization Number. For shipping damage, include photos and note if damage was
recorded upon delivery. Bathing Brands covers return shipping for damages or errors. For
change-of-mind returns, restocking fees are case-by-case, and customers cover shipping both ways. We
recommend insured shipping via the original method (Ground or LTL). Once returned, items are
inspected, and if damaged, you’ll be notified to file a claim with your shipper. Refunds are processed
after inspection. Custom or special-order items are non-returnable.
To request a return or refund, customers can use our contact form, email
(info@peakprimalwellness.com) , or phone
- (877) 689-4898. Once the product is inspected and confirmed to be in brand new condition, we will initiate the
refund, which typically takes 5-7 business days to post back to the original payment method. Refunds
can be applied via the customer’s preferred method, including card or bank transfer. Shipping
instructions and the return address will be provided upon contacting customer service. Please include
photos if the product arrives damaged.
Click here
to view our complete return policy for more details.
Shipping Policy
Customers may contact us by phone or email anytime to inquire about the status of their order. While we may not always have a tracking link available before the order ships, we are happy to check its current status for you. If an item is never received, please contact us immediately. We will promptly file a claim on your behalf and ship a replacement to ensure you receive your product as soon as possible. Click here to view our complete Shipping policy for more details.
Frequently Asked Questions
What is the HUUM CLIFF 6.0STU Sauna Heater Package?

It’s a 6.0kW sauna heater designed for sauna rooms between 176 to 353 cubic feet.
Where is this sauna heater manufactured?

The HUUM CLIFF sauna heater is designed and made in Estonia.
What type of electrical connection is required?

A 6.0kW power supply is required, and professional installation by a licensed electrician is recommended.
How fast does the heater warm up?

It heats up 25% faster due to its built-in internal air duct.
Can I control the sauna remotely?

Yes, with the optional Wi-Fi-enabled UKU control system, you can manage the sauna via the HUUM mobile app.
Can the control panel be installed outside the sauna?

Yes, the UKU control system can be installed inside or outside the sauna.
How do stones affect sauna performance?

Direct contact between stones and heating elements ensures a longer, milder heat and improved steam production.