
Product Information
The HUUM CLIFF 9.0STU Sauna Heater Package features a powerful 9.0kW heater, designed for sauna rooms up to 529 cubic feet. Its sleek, compact design allows for flexible installation in various sauna spaces.
The package includes a UKU control system (WiFi optional) for advanced temperature regulation. With a large 165-pound stone capacity, it ensures long-lasting, milder heat through direct stone contact.
Constructed from high-quality stainless steel, it offers durability and efficient performance. This all-in-one package provides everything needed for a premium sauna experience.



Product Features
The HUUM CLIFF 9.0STU Sauna Heater features a slim, space-saving design and heats up 25% faster with an internal air duct, ideal for sauna rooms from 317 to 529 cubic feet.
With a 165-pound stone capacity, direct stone contact ensures longer-lasting, milder heat.
The UKU control system (WiFi optional) provides advanced temperature control and smart heating features.

HUUM CLIFF 9.0STU Pkg CLIFF Series 9.0kW 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: Desinged for sauna rooms from 317 to 529 cu. ft.
- Efficient Heat Distribution: Direct contact between stones and heating elements for longer, milder heat.
What’s Included?
CLIFF 9.0kW Sauna Heater
- 9.0kW 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 9.0STU |
Model | CLIFF 9.0STU PKG |
CLIFF 9.0 | |
Kilowatt Rating | 9.0 KW |
Minimum Cubic Feet | 317 CF |
Maximum Cubic Feet | 529 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 9.0STU Sauna Heater Package?

It’s a 9.0kW sauna heater designed for sauna rooms between 317 to 529 cubic feet.
Does the package include everything needed for installation?

No, the UKU control system and sauna stones are sold separately.
Is the heater suitable for both home and commercial saunas?

Yes, it can be used in residential and light commercial sauna settings.
What makes the CLIFF series unique?

Its compact, space-saving design, fast heating, and large stone capacity provide an enhanced sauna experience.
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.
Does this model support wall mounting?

No, it is a floor-standing heater designed for stability and efficient heat distribution.
How do stones affect sauna performance?

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