HUUM Cliff sauna heater stones in the stainless steel cage

HUUM CLIFF 9.0kW

Name: HUUM CLIFF Series 9.0kW Sauna Heater Package
Brand: HUUM
Price: 4100.0 USD
Availability: InStock

Electric Sauna Heater | HUUM

The HUUM CLIFF 9STU sauna heater package delivers serious heating power in the same slim tower footprint as the rest of the CLIFF line. This complete kit includes the CLIFF 9.0kW heater, your choice of UKU control, and 165 lbs of sauna stones — everything your electrician needs for medium-size sauna rooms from 283 to 460 cubic feet.

Same vertical design philosophy as the 6kW CLIFF: a high stone mass packed into a 10.6" × 10.6" footprint, smaller safety distances, and flexible placement in tighter layouts. Direct stone-to-element contact and the internal air duct deliver faster heat-up and the longer, milder löyly HUUM is known for.

Designed, engineered, and handcrafted in Estonia with industrial-grade stainless steel construction and heating elements. Rated at 9.0kW on 240V single-phase power with a 37.5A draw — your licensed electrician should plan for a 50A breaker and 8 AWG wire.

PRODUCT SHEET

HUUM Cliff sauna heater package with UKU control and stones

HUUM CLIFF sauna heater studio product shot

HUUM CLIFF heater recessed in sauna bench

HUUM CLIFF heater in modern sauna interior

HUUM CLIFF stainless steel and stone detail

HUUM CLIFF Series 9.0kW Sauna Heater Package

Sauna Controls: Digital (Local) Digital (Local) WiFi Enabled (UKU)

Controller Style: Classic - Black Classic - Black Classic - Gray Classic - White Wood Glass - Black Glass - Mirror Glass - Gold

Product variants

$4,100.00 USD

Free Shipping

Description

Features

What's Included?

Size & Weight

Electrical Specs

Shipping & Delivery

Warranty

Documents

KEY FEATURES

CLIFF 9.0kW Sauna Heater

Slim vertical design for saunas with limited space
240V/1PH operation
For sauna rooms from 283 to 460 cu. ft.
Works with UKU controls
165 lb stone capacity
Direct contact between stones and heating elements
More exposed stones create a longer and milder heat
Removable rib(s) for more accurate stacking of stones
Stainless steel construction
Stainless steel, industrial quality heating elements
Floor model
Heats up to 25% faster due to internal air duct
Small safety distances
Designed, engineered, and made in Estonia
Dimensions: 10.6"W (270mm) x 10.6"D x 38.4"H (975mm)
Limited 3-year residential warranty and 1-year commercial warranty (excluding elements)

UKU Control

Sleek black control display panel
Multiple color options available (additional charges apply)
Settable on/off, time, temperature, and delay
Settable temperature range of 104-230°F
Delayed start up to 48hrs in advance
Optional built-in Wi-Fi interface for HUUM mobile app (additional charges apply)
8 language options: English, German, Russian, Italian, Finnish, Estonian, Polish and French
Inside/outside sauna room installation
Optional smart heating setting
Available decorative control display panels
Displays set temperature and room temperature
Temperature sensor
Door sensor to keep the heat inside the room
Remotely located main control module
Connects to lights and ventilation
Overheat protection
Child safety lock
Control Console Dimensions: 2.2"W (55mm) x 0.9"D (22mm) x 4.1"H (105mm)
Main Control Module Dimensions: 3.5"W (90mm) x 2.3"D (58mm) x 5.6"H (142mm)
Limited 3-year residential warranty and 1-year commercial warranty

Stones 12

Olivine diabase sauna stones
Rounded shape to complement heater design
Durable with high-heat capacity
Stones range from 1" to 2" (3-5 cm)

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
3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

UKU Control

Black Control Console
Main Control Module
Temperature Sensor
Door Sensor
Control Display Panel Cable
Temperature Sensor Cable
Door Sensor Cable
Installation and Operation Manual
3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty

Stones 12

165 lbs of 1" to 2" (3-5 cm) Round Sauna Stones

SIZE & WEIGHT

Shipping Weight with Sauna Stones: 200 lbs

Width: 10.6"
Depth: 10.6"
Height: 38.4"

ELECTRICAL SPECS

OVERVIEW

Electrical Spec Guide

240V, Single Phase Amperage
37.5 Amps

Kilowatt Rating: 9.0kW
Minimum Cubic Feet: 283 CF
Maximum Cubic Feet: 460 CF
Circuit Breaker Amperage: 50 Amps
Wire Size: 8 AWG

SHIPPING & DELIVERY

READY TO SHIP!

Please allow 5-7 business days transit time to receive your order once it has shipped. *This time frame pertains to orders placed within the continental United States and does not include Alaska and Hawaii.

CURBSIDE DELIVERY

The price you see is the price you pay. Shipping and standard curbside delivery is included in all US domestic lower 48 states.

DELIVERY DETAILS

This sauna heater is delivered fully assembled. It may be delivered Ground shipping or by a freight truck depending on size, weight, and location. If a freight truck is required, we'll reach out to schedule a delivery appointment. It may arrive on a wooden pallet for solid protection. The driver is responsible for “curbside delivery only” and will provide limited assistance at the site. Prior to shipping this product, we contact customers to share shipment details & needs, and discuss any extenuating delivery circumstances that may complicate or cause additional delivery expenses. Our goal is to ensure your project’s success.

5-Year Limited Warranty

DOCUMENTS

CLIFF Installation & Operation Manual

CLIFF Warranty

UKU Installation & Operation Manual

UKU Install Diagram - Classic
UKU Install Diagram - Glass

UKU Installation Video

UKU Controller Warranty

Stone Placement Video

Description

Features

KEY FEATURES

CLIFF 9.0kW Sauna Heater

Slim vertical design for saunas with limited space
240V/1PH operation
For sauna rooms from 283 to 460 cu. ft.
Works with UKU controls
165 lb stone capacity
Direct contact between stones and heating elements
More exposed stones create a longer and milder heat
Removable rib(s) for more accurate stacking of stones
Stainless steel construction
Stainless steel, industrial quality heating elements
Floor model
Heats up to 25% faster due to internal air duct
Small safety distances
Designed, engineered, and made in Estonia
Dimensions: 10.6"W (270mm) x 10.6"D x 38.4"H (975mm)
Limited 3-year residential warranty and 1-year commercial warranty (excluding elements)

UKU Control

Sleek black control display panel
Multiple color options available (additional charges apply)
Settable on/off, time, temperature, and delay
Settable temperature range of 104-230°F
Delayed start up to 48hrs in advance
Optional built-in Wi-Fi interface for HUUM mobile app (additional charges apply)
8 language options: English, German, Russian, Italian, Finnish, Estonian, Polish and French
Inside/outside sauna room installation
Optional smart heating setting
Available decorative control display panels
Displays set temperature and room temperature
Temperature sensor
Door sensor to keep the heat inside the room
Remotely located main control module
Connects to lights and ventilation
Overheat protection
Child safety lock
Control Console Dimensions: 2.2"W (55mm) x 0.9"D (22mm) x 4.1"H (105mm)
Main Control Module Dimensions: 3.5"W (90mm) x 2.3"D (58mm) x 5.6"H (142mm)
Limited 3-year residential warranty and 1-year commercial warranty

Stones 12

Olivine diabase sauna stones
Rounded shape to complement heater design
Durable with high-heat capacity
Stones range from 1" to 2" (3-5 cm)

What's Included?

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
3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)

UKU Control

Black Control Console
Main Control Module
Temperature Sensor
Door Sensor
Control Display Panel Cable
Temperature Sensor Cable
Door Sensor Cable
Installation and Operation Manual
3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty

Stones 12

165 lbs of 1" to 2" (3-5 cm) Round Sauna Stones

Size & Weight

SIZE & WEIGHT

Shipping Weight with Sauna Stones: 200 lbs

Width: 10.6"
Depth: 10.6"
Height: 38.4"

Electrical Specs

ELECTRICAL SPECS

OVERVIEW

Electrical Spec Guide

240V, Single Phase Amperage
37.5 Amps

Kilowatt Rating: 9.0kW
Minimum Cubic Feet: 283 CF
Maximum Cubic Feet: 460 CF
Circuit Breaker Amperage: 50 Amps
Wire Size: 8 AWG

Shipping & Delivery

SHIPPING & DELIVERY

READY TO SHIP!

CURBSIDE DELIVERY

The price you see is the price you pay. Shipping and standard curbside delivery is included in all US domestic lower 48 states.

DELIVERY DETAILS

Warranty

5-Year Limited Warranty

Documents

DOCUMENTS

CLIFF Installation & Operation Manual

CLIFF Warranty

UKU Installation & Operation Manual

UKU Install Diagram - Classic
UKU Install Diagram - Glass

UKU Installation Video

UKU Controller Warranty

Stone Placement Video

Design

DIMENSIONS

Width: 10.6"
Depth: 10.6"
Height: 38.4"

MATERIALS

Industrial-grade stainless steel construction with a high stone mass for longer, milder heat.

Brand Spotlight

HUUM

Advanced Protection

Throw water on the rocks and enjoy the traditional steam sauna. Built in automated controls and full remote WiFi monitoring (optional) to protect your investment around the clock.

HUUM

Smart Heating to 212°F

Control your heater from anywhere (optional), or set it and forget it with automated temperature regulation up to 230°F.

HUUM

Soft Steam

The amount of metal used in HUUM sauna heaters is very small – this ensures that the majority of the heat derives from the stones, and not from the metal.

DELIVERY & INSTALL

Delivery

Assembly

Install

DELIVERY

Availability

Most of our products are in stock and ready to ship right away. Unless a product is specifically labeled as custom, you can expect your order to be fulfilled without delay.

Processing

Order processing fluctuates depending on seasonality. Pleaser refer to the "Estimated Delivery Date" above or contact us for the most up to date processing and delivery timelines.

Shipping

This item ships LTL freight on a wood pallet or crate. Standard curbside delivery is scheduled during a time that works best for you. White-glove delivery includes debris removal and product placement, and is available for an additional fee based on location and weight of order. Please contact us for a White-Glove Delivery quote or to learn more about delivery options.

ASSEMBLY

HUUM heaters are meticulously designed and require very little assembly to get up and running. Installation should be completed by a licensed electrician. HUUM heaters require a stones to operate.

INSTALL

Electrical install should be completed by a licensed electrician. Please refer to the electrical specs above for specifics on what is required for your sauna.

**WiFi control models require a separate electrical enclosure to be mounted and installed on the backside of the sauna and typically add $1k-$4k to electrical install costs depending on location, distance from your electrical panel, and a few other factors. Please reach out to us directly if you'd like some more information about the differences between a local sauna control install vs. WiFi install.

Full Installation Guide

Feel free to leverage the CPG network of recommended electricians that are veterans at sauna install. If you choose to use your own electrician, we can schedule a pre-install call to make sure they have everything they need to succeed.

Delivery

DELIVERY

Availability

Most of our products are in stock and ready to ship right away. Unless a product is specifically labeled as custom, you can expect your order to be fulfilled without delay.

Processing

Order processing fluctuates depending on seasonality. Pleaser refer to the "Estimated Delivery Date" above or contact us for the most up to date processing and delivery timelines.

Shipping

Assembly

ASSEMBLY

HUUM heaters are meticulously designed and require very little assembly to get up and running. Installation should be completed by a licensed electrician. HUUM heaters require a stones to operate.

Install

INSTALL

Electrical install should be completed by a licensed electrician. Please refer to the electrical specs above for specifics on what is required for your sauna.

Full Installation Guide

Let customers speak for us

from 59 reviews

Great Barrel Cold Plunge

Everything as advertised. Easy set-up and a great addition to our sauna. I had a few questions and received prompt replies and great customer service. I would order again.

Tom - Northern Wisconsin

08/17/2026

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Edward Plummer

08/12/2026

Absolutely stellar interaction with Mitch

Absolutely stellar interaction with Mitch. Cannot thank them enough. Would do business again without a thought in the matter!

Grant Paquin

07/10/2026

Sauna stove and glass door

Mitch and the team were incredibly thoughtful and patient while I worked on my order. Shipping was clear and conciencias and everything arrived as it should

Grant Paquin

07/02/2026

Awesome folks!

Communication and attention to customer service was amazing!!!

Kiley Hill

05/01/2026

Fantastic

Love our large sauna! Actually put it together by myself.....was not recommended but can be done! Exactly as advertised! Great service!

John Riekhof

03/02/2026

Great Cold Plunge Tub

This is a great cedar-sided cold plunge tub. I spent a considerable amount of time researching cold plunge tubs and wanted one with real ceder wood to fit my sauna room. It also has a durable heat pump, compared to lower-quality chillers. I have had it a few months and no issues. Also, in the pics below, I have the chiller, which is about a 2' x 2' cube plumbed to a different space for a clean sauna room look. I would highly recommend this tub and the price is less than some on the market.

Tom L

01/20/2026

These guys are AMAZING!

These guys are AMAZING! I’d leave 10 stars if I could. We purchased a barrel sauna and cold plunge from them in fall 2025. They were absolutely terrific to work with! Our contractor and electrician had many (many) questions, all were promptly and kindly answered. They even customized our order by selling an extra long cord so we could install control panel inside for extra protection in MN winters. Shipping and delivery was a breeze. We are using our sauna daily and love it! Zero hesitation recommending this company! Thank you Johnny and Mitch for all your help!!!

Caley Philipps

12/12/2025

Caley Philipps

12/09/2025

What a wonderful sauna!

Researched many saunas for many months. Finally landed on this one. Only complaints i have are the instructions weren't very well written and the trim on the outside was very difficult to put together. We use it almost daily.

Ashley Slocum

11/24/2025

Great service, great sauna

Super stoked about the new sauna. I ended up with a beautiful 2-3 person cedar sauna with a huum heater. It’s perfect. These guys were helpful in choosing the right size, type, etc.
very glad I used the cold plunge guys.

Dr. Stephen Sherman

10/25/2025

Great service!

Received order quickly. Great service

Chad Anderson

10/10/2025

Cold Plunge Gurus

Had a great experience working with the Cold Plunge Guys and would highly recommend their products!

Jonathan Zook

10/10/2025

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Great Customer Service

Honest, knowledgeable and reliable. I appreciate all the care that goes into each personal interaction.

Krystle HUMPHREYS

07/09/2025

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Awesome!

I ordered my heater on a Thursday and it arrived the following Tuesday.
The price was by far the lowest I was able to find. I am super impressed with this company.

Todd Hofer

07/03/2025

DETOXIFICATION

detoxification

Sweat is the safest and most natural way to expel the body's toxins. Practiced for thousands of years, sauna is still one of the most efficient ways to sweat on earth today.

LEARN MORE

MUSCLE RECOVERY

Extensive research has shown that exposure to cold and heat can effectively reduce inflammation, accelerating the recovery process and providing relief from pain.

LEARN MORE

MENTAL HEALTH

Through breathing techniques you can learn to calm your nervous system in intense heat and cold. Breathing is the key to a racing heart and a racing mind.

LEARN MORE

IMPROVED SLEEP

Whoop™ posted a study that showed a 2.5x increase in sleep consistency on days when people practice cold exposure. Learn how heat & cold to create better habits and deeper sleep.

LEARN MORE

HEART HEALTH