HUUM CLIFF Mini 4STU Sauna Heater Kit 4 kW

• Wall-mounted electric sauna heater kit
• Model: CLIFF MINI 4STU (package)
• Heater model: CLIFF Mini 4
• Output: 4.0 kW (240 V)
• Alternate output: 2.85 kW (208 V)
• Recommended sauna room size: 106–177 ft³ (240 V)
• Recommended sauna room size: 106–159 ft³ (208 V)
• Slender heater design
• Suitable for small saunas with limited space
• Short safety distances for easier placement
• Internal air tunnel design for faster heating
• Stone-forward design for mild steam
• Direct contact between stones and heating elements
• Removable rib(s) to support more accurate stacking of stones
• More exposed stones designed to create longer, milder heat
• Stainless steel construction
• Stainless steel, industrial-quality heating elements
• Designed, engineered, and made in Estonia
• Stone capacity: 60 kg (132 lb)
• Stones included in kit
• Stone type: olivine diabase sauna stones
• Rounded stone shape to complement heater design
• Stone size: 3–5 cm (1" to 2")
• UKU Local control system included in kit
• Black control console included
• Main control module included
• Temperature sensor included
• Door sensor included
• Control display panel cable included
• Temperature sensor cable included
• Door sensor cable included
• Settable on/off control via UKU
• Settable time function via UKU
• Settable temperature function via UKU
• Settable delay function via UKU
• Settable temperature range: 104–230°F
• Delayed start up to 48 hours
• Control display can be installed inside or outside sauna room
• Displays set temperature and room temperature
• Overheat protection
• Child safety lock
• Connects to lights and ventilation
• Optional built-in Wi-Fi interface for mobile app control (variant-dependent)
• Multiple language options supported by control system (8 languages)
• Cable entry located on the bottom cover of the heater
• Requires heat-resistant power cable (not included)
• Power cable must meet UL 62 requirements in the US
• Power cable must meet CSA 49 requirements in Canada
• Non-heat-resistant PVC-insulated power cable must not be used
• Junction box must be waterproof
• Junction box location requirement: up to 20 in (50 cm) from the floor
• A method to disconnect all poles from the mains must be installed before the sauna controller
• Recommended connection without a GFCI breaker
• Circuit breaker specification: 20 A (240 V)
• Minimum wire size: 12 AWG (240 V)
• Included with heater: installation and operation manual
• Included with heater: 2 blocks for disassembling slats/ribs for stone loading
• SGS Listed (as stated for the product line)

• Dimensions (W x D x H): 10.6 in x 6.3 in x 38.4 in (270 mm x 160 mm x 975 mm)
• Heater weight: 33 lb (15 kg)
• Shipping weight with sauna stones: 165 lb (75 kg)
• Stone capacity: 132 lb (60 kg)
• Output (240 V): 4.0 kW
• Output (208 V): 2.85 kW
• Amps (240 V): 14.58 A
• Circuit breaker (240 V): 20 A
• Minimum wire size: 12 AWG
• Safety distances: A 2.36 in (60 mm); B 15.35 in (390 mm)
• Recommended sauna room size (240 V): 106–177 ft³ (3–5 m³)
• Recommended sauna room size (208 V): 106–159 ft³ (3–4.5 m³)
• Model/MPN/UPC/GTIN: 534-CLIFFM35STULB
• Warranty: 3 years (private use); 1 year (commercial use)

If you’re building a compact sauna and want a streamlined path to a complete heating system, the CLIFF Mini 4STU kit packages the essential components together: a 4 kW wall-mounted heater, a UKU Local control system, and 132 lb of stones. The result is a setup designed for steady heat and comfortable steam in 106–177 ft³ rooms, with a slim heater footprint that’s easier to place in tighter layouts.
Beyond fit and capacity, day-to-day usability comes from the included UKU control system. With 104–230°F temperature control and up to 48-hour delayed start, you can schedule sessions around your routine. Included temperature and door sensors, plus built-in protections like overheat protection and a child safety lock, support safer, more predictable operation.
At the brand level, HUUM focuses on stone-rich heater designs and durable metal construction made in Estonia, aiming to preserve the traditional sauna feel—consistent heat and satisfying steam—while delivering modern control and practical installation features for home sauna builds.

Typical delivery time: Most Huum orders arrive within 10 business days. Actual timing can vary by destination, carrier scheduling, and product availability.

Order Processing

• Order Verification: After you place an order, we confirm availability with Huum or an authorized distribution partner in our network.
• Payment Authorization: Once availability is confirmed, your payment method is charged.
• Order Placement: We then place the order with the supplier for fulfillment.
• Order Cutoff Time: Orders placed after 2:00 PM CST may begin processing the next business day.

Shipping Rates and Delivery Timeline

• Free Shipping: Shipping is FREE to the continental U.S. (lower 48 states).
• Handling Time: 1 to 10 business days
• Transit Time: 1 to 14 business days
• Affirm Note: Orders paid through Affirm can delay shipping timelines by 5 to 7 days.

Shipment Confirmation and Tracking

• You will receive a shipment confirmation email once your order ships with tracking details.
• Tracking may take up to 24 hours to populate after the label is created.
• The freight carrier may vary based on cost and service quality.
• Most freight carriers attempt to contact you 1 to 2 days before delivery to schedule a drop-off time, but this is not guaranteed.

Delivery Options

Standard Delivery

• Curbside delivery only. You are responsible for bringing the shipment inside.

Optional Upgrades

• White Glove Service: Inside delivery to a room of your choice. Does not include unpacking, assembly, or installation. Adds 2 to 5 business days for scheduling and coordination.
• Premium Installation Service: Inside delivery plus assembly and installation. May include electrical work depending on the product and site conditions. The base fee at checkout covers delivery and initial setup costs. Additional labor may be billed separately. Adds 2 to 5 business days for scheduling and coordination.

Pre Order and Special Order Items

• If an item is pre order or out of stock, we will email or call to confirm you are comfortable with extended shipping times before your payment is processed.
• Estimated timelines are estimates and may change due to production, freight, or carrier factors.
• Outside the lower 48 states: We can often arrange shipping, but it is not part of our standard offering. Contact us for a custom quote.

InHouse Wellness extends the HUUM manufacturer warranty to the original purchaser. Warranty coverage, terms, and remedies are set by HUUM. Any warranty claims should be communicated directly to HUUM.

Warranty Periods (from date of purchase)

Private / residential use

• Electric sauna heaters: 3 years
• Wood-burning heaters: 3 years
• Control units/controllers: 3 years
• Spare parts: 1 year

Commercial use

• Electric sauna heaters: 1 year
• Wood-burning heaters: 1 year
• Control units/controllers: 1 year
• Spare parts: 1 year

Commercial use definition: Includes business use, private use for commercial purposes, or private use exceeding 1,500 hours within a 12-month period.

What HUUM Covers

HUUM’s limited warranty covers defects in materials and workmanship under normal use during the applicable warranty period.

Requirements for Warranty Coverage (Key Points)

• Inspect promptly upon receipt and report any shipping/delivery damage within 7 days (or the authorized dealer’s shorter timeframe, if applicable).
• Products must be installed, connected, operated, and maintained according to HUUM manuals and all applicable local/national building, electrical, and fire-safety codes.
• Electrical products must be installed/connected by a licensed electrician, and proof may be required.
• The installed set must be complete as defined in HUUM documentation.
• The purchase price must be fully paid by the end-user.

How to File a Warranty Claim

• Notify HUUM without delay and no later than 30 days from discovering the defect or damage.
• If a visible defect/damage is discovered after delivery, submit the claim (with photos) before installation.
• Be prepared to provide:
• Product name/model and serial/batch/product number (when available)
• Description of the issue and photos (if possible)
• Description of the environment and conditions where the product was used
• Proof of purchase (invoice/receipt)
• Claims must be submitted within the warranty period.

What’s Not Covered (Common Exclusions)

The limited warranty does not cover defects/damage not caused by HUUM, including:

• Heating elements of electric heaters
• HUUM accessories
• Wood-burning stove door glass and ash grate
• Sauna stones (all heaters)
• Sensors for controllers
• Normal wear and cosmetic defects
• Damage from insufficient ventilation, constant humidity, corrosion/sooting/discoloration, or unsuitable storage/installation location
• Transportation/storage damage (including incorrect storage conditions)
• Failure to follow installation, use, or maintenance instructions
• Incorrectly sized/unsuitable product selection for the application
• Accidents, power surges, extreme weather, fires, earthquakes, or other “acts of God”
• Unauthorized repairs/modifications, non-original parts, or incompatible products
• Regular maintenance, cleaning, and periodic check-ups

When you’re investing in premium wellness equipment, you want more than just a good deal—you want the right partner. Here’s why our customers trust us over anyone else:

• Guaranteed Best Pricing – We work directly with manufacturers, so you never overpay. If you find a lower price, we don’t just match it—we beat it.
• Unbeatable Shipping Times – Even if others claim faster delivery, we win. Your order ships either from our Austin, TX warehouse or straight from the manufacturer—fast, reliable, and trackable.
• White Glove Delivery & Installation – We offer professional delivery, assembly, and installation so your new equipment is set up perfectly from day one.
• U.S.-Based, Real Support – Our team is right here in the USA, ready to help by phone, text, or email—before, during, and long after your purchase.
• Since 2011 – Over a decade of helping health and wellness consumers connect with top brands and the perfect products for their needs.
• Factory Warranties Included – Full manufacturer coverage on every product, plus our help if you ever need to file a claim.
• Exclusive Video & eBook Guides – From maintenance tips to usage tutorials, we give you the knowledge to get the most from your investment.

Bottom line: We don’t just sell equipment—we deliver the fastest shipping, the most reliable support, and the kind of buying experience you’ll tell your friends about.