HUUM STEEL 6.0STU Pkg - STEEL Series 6.0kW Sauna Heater Package
This HUUM Steel sauna heater package comes complete with the traditionally designed STEEL 6.0kW sauna heater, UKU control (WiFi optional), and sauna stones - everything you need to build your dream sauna experience. The package has been combined for use in sauna rooms from 177 to 318 cubic feet (CF).
Features & materials
- Sleek design
- Suitable for use in saunas with modest space
- For sauna rooms from 177 to 318 cu. ft.
- Small safety distances
- Heats up to 25% faster due to internal air duct
- 331 pound stone capacity (required 10 boxes sold separately)
- Direct contact between stones and heating elements
- More exposed stones create a longer and milder heat
- Stainless steel construction
- Stainless steel, industrial quality heating elements
- Floor model
- Designed, engineered, and made in Estonia
- Dimensions: 12.6" W (320mm) x 12.6" D (320mm) x 38.4" H (975mm)
- Limited 3-year residential warranty and limited 1-year commercial warranty (excluding elements)
- Sleek Black control display panel
- Multiple Color Options available (additional charges apply)
- Settable on/off, time, temperature, and delay
- Settable temperature range of 104-230F
- 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 limited 1-year commercial warranty
- Olivine diabase sauna stones
- Rounded shape to complement heater design
- Durable with high-heat capacity
- Stones range from 1" to 2" (3-5 cm)
Manuals & documents
Shipping & delivery
Shipping cost: Shipping on this item is free within the contiguous US.
Most in-stock orders ship within 3–5 business days of confirmed payment, and delivery is typically 5–15 business days after shipment. Made-to-order saunas and custom-configured rooms need production time on top of that, which we confirm before the order is released. We ship within the contiguous United States.
Large items ship LTL freight on a pallet, delivered curbside — to the curb or the end of your driveway, often from a trailer up to 53 feet long. Curbside does not include unpacking, assembly, installation or electrical connection. The carrier calls to book an appointment and someone must be there to receive the shipment. Tell us at the time of order if access is limited — narrow or rural roads, steep driveways, gated communities — and ask for liftgate service if you have no dock or forklift.
Inspect the shipment before the driver leaves and before you sign. Count the cartons and pallets against the paperwork, check glass doors and panels, write any damage or shortage on the Delivery Receipt, and photograph it. Email info@plungeintosaunas.com within 48 hours of delivery with your order number, photos and the noted receipt — the same window covers concealed damage and missing items. Keep the packaging while a claim is open.
Cancellations & returns
Cancel before the order has been submitted for fulfillment and it is refunded in full — email info@plungeintosaunas.com with your order number. After that point manufacturer, carrier, return-freight or restocking fees may apply. Every return must be approved by us in writing first: products ship from different manufacturer warehouses, so the correct return address varies, and anything sent back without authorization may be refused.
Return requests are made within 30 days under our general policy; some brands run that window from the date of purchase rather than delivery. Items must be unused, uninstalled, never heated or filled, complete in their original packaging and in resalable condition. Restocking fees run up to 25% depending on the manufacturer, while Harvia, HUUM, SaunaLife, Saunum, Narvi, ThermaSol, Delta, Kohler and Mr. Steam charge no restocking fee at all, only a re-boxing fee of roughly $20–$50 if the original packaging does not come back intact. On a change-of-mind return you pay return shipping and the original outbound shipping is not refunded.
If the item arrived damaged or a manufacturer error is at fault, return shipping is covered for you. Custom, made-to-order and special-order items already in production, clearance and open-box items, heaters that have been wired or fired, tubs and generators that have been filled, assembled or heated rooms, opened consumables and all Canadian Timber Collection products cannot be returned. Ask us before you buy if you are unsure.
Complete your setup
Total for 1 item $3,895.00
-
HUUM STEEL 6.0STU Pkg -
-
-
- Free shippingOn this item · contiguous US
- Authorized dealerFull manufacturer warranty
- Sized by a specialistRoom, heater and install checked
- Talk to a human(888) 739-3321
Model specifications
The figures that decide the buy. The complete sheet ships with the manual.
- Model
- STEEL 6.0STU Pkg
- Heater Width
- 12.6" (320mm)
- Heater Depth
- 12.6" (320mm)
- Heater Height
- 38.4" (975mm)
- Shipping weight
- 160 – 430 lb
- Sauna room volume
- 177 – 318 cu. ft.
- Voltage
- 240V, single phase
- Amperage
- 25A (calculated) · 30A breaker · 10 AWG wire
Manufacturer figures. The complete specification sheet, clearances and wiring details are in the manufacturer's installation manual. See the Manuals tab above.
Heater Size Calculator
At 6.0 kW this heater is rated for sauna rooms of 177 to 318 adjusted cu ft.
A heater that is too small never reaches temperature; one that is too big cycles on and off and gives harsh, dry heat. Match the rated range to your room's adjusted volume — the calculator does the maths in under a minute, or call us with your dimensions.
- 6.0 kW 177318
The shaded bar is the room size this heater is rated for. Work out your room's adjusted cubic feet below, then check the number lands inside the bar.
Working out your adjusted cubic feet
- Room volume — length × width × height in feet.
- Glass and stone add load — count about 4 cu ft extra per square foot of glass, tile or stone wall.
- Uninsulated or log walls — multiply the total by 1.5.
Setting up
What happens between checkout and your first session.
-
Most heaters and controls ship by UPS or FedEx Ground in 3–5 business days. Heavy stoves and stone packages move by LTL freight to the curb instead. Check the carton for damage before you sign, and keep the packaging until the heater is installed and running.

-
Every heater has a minimum clearance to the side walls, the ceiling and whatever sits in front of it, and this model's figures are on the spec table above and in its installation manual. Electric models need a dedicated 240 V circuit at the amperage listed there, wired by a licensed electrician. Wood-burning stoves need a chimney kit, a protected floor under the firebox, and a heat shield wherever the manual calls for one.

-
Work out your room's volume as width × length × height, then adjust it upward for glass, tile or stone, which all add load. Match that figure to the range on this heater's spec table — an undersized heater is the most common reason one comes back. Our Heater Size Calculator does the adjustment for you, or call us and we'll size it with you.

-
Most electric heaters ship without stones and without a control unit, and wood stoves ship without a chimney kit — check this model's spec table for what is and is not included. Rinse and stack the stones loosely before the first heat-up, and add a bucket and ladle if you want to throw water.

Not sure your site is ready? Call (888) 739-3321 before you order and we'll walk through it with you.
Talk it through with a sauna specialist
Room size, heater match, electrical, delivery access — a ten-minute call answers most of it. No pressure, no sales script.
Daily, 8 AM to 7 PM Pacific. Or email info@plungeintosaunas.com any time.
-
Sizing & fit
We'll check the footprint, ceiling height and heater match for your space. -
Electrical & site
What your electrician needs to know before you order. -
Delivery
Lead time, freight access and what to expect on delivery day.
What happens next
-
1
We check the order
A sauna specialist reviews the configuration, the delivery address and freight access, and usually calls you to confirm it before the order is released to the manufacturer. Anything that needs changing gets changed before it ships.
-
2
Confirmation and lead time
You get an email with the confirmed lead time, the manuals for your unit and what to prepare on site. Tracking follows within 24 hours of it leaving the warehouse.
-
3
Delivery day and after
The freight carrier calls to book a curbside appointment — count the cartons and note any damage on the delivery receipt before you sign. Assembly, electrician and warranty questions after that come to us, and we handle them with the manufacturer on your behalf.
Frequently Asked Questions
Yes! Shop Pay Installments may be available at checkout, allowing you to split your order into installment payments, with interest-free options on eligible orders and monthly plans from 0–36% APR. Just select Shop Pay at checkout to see your options.
Warranty coverage varies by manufacturer and product. Please refer to the product page or included documentation for specific details. Warranties are provided by the manufacturer. We're happy to help connect you with the manufacturer if you have a warranty question.
We ship within the contiguous United States only. We do not currently ship to Alaska, Hawaii, PO boxes, APO/FPO addresses, or international destinations.
No. Standard curbside delivery means the carrier delivers to the curb or end of your driveway only. The driver is not required to bring items into your home, garage, or backyard, and delivery does not include unpacking, assembly, or installation.
Yes. Our store is secured with SSL encryption and all payments are processed through Shopify's secure checkout. We never store your full credit card information.
Exchanges are handled on a case-by-case basis. Contact us at info@plungeintosaunas.com with your order number and the item you'd like instead. If approved, you may be responsible for price differences, return shipping, and any applicable restocking fees.






