
Product Information
The HUUM DROP 4.5STU Sauna Heater Package features the award-winning 4.5kW DROP heater, designed for sauna spaces up to 247 cubic feet. Its elegant, water-drop-inspired design softens the look of traditional saunas.
The wall-mounted heater holds 122 lbs of olivine stones, ensuring consistent, soft, and high heat. Choose between the UKU Local digital control or UKU Wi-Fi for remote operation.
Its large rock capacity allows for superior steam production and an enhanced sauna experience. Winner of the Red Dot Design Award, this heater blends beauty and performance seamlessly.



Product Features
The HUUM DROP 4.5STU Sauna Heater features a unique water-drop design with a compact, wall-mounted structure, ideal for sauna rooms from 106 to 247 cubic feet.
Its 122-pound stone capacity ensures long-lasting, soft heat with direct stone contact for superior steam.
The UKU control system (Wi-Fi optional) provides precise temperature control and smart heating features.

HUUM DROP 4.5STU Pkg DROP Series 4.5kW Sauna Heater Package
- Multilingual Interface: Supports 8 languages: English, German, Russian, Italian, Finnish, Estonian, Polish, and French.
- SGS Listed: Meets safety and quality standards.
- Direct Stone Contact: Direct Stone Contact – More exposed stones create a longer-lasting, milder heat
- Olivine Diabase Sauna Stones: Designed for high heat retention and efficient steam production.
What’s Included?
Drop 4.5kW Sauna Heater
- 4.5kW sauna heater
- Wall-mount bracket
- 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
- 132 lbs of 2" - 4" (5-10 cm) round Olivine sauna stones

Additional Features
The HUUM DROP 4.5STU Sauna Heater features an award-winning water-drop design, blending elegance with
performance. Its wall-mounted build saves space while the 122-pound stone capacity ensures consistent,
long-lasting heat.
Made from stainless steel with industrial-grade heating elements, it offers durability. Wi-Fi-enabled
UKU controls (optional) allow remote operation, while smart heating optimizes energy efficiency.

Designed in Estonia
Engineered for efficiency and durability.

Modern Digital Display
Sleek black control panel with multiple color options (extra cost).

Size Range
Stones vary from 2" to 4" (5-10 cm) for optimal performance.

Safety Features
Includes door sensor, overheat protection, and child safety lock.
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 | DROP 4.5STU Pkg |
Model | DROP 4.5STU Pkg |
DROP 4.5 | |
Kilowatt Rating | 4.5kW |
Minimum Cubic Feet | 106 CF |
Maximum Cubic Feet | 247 CF |
Heater Weight | 24 lbs |
Shipping Weight with Sauna Stones | 146 lbs |
240V, Single Phase Amperage | 18.8 Amps |
Circuit Breaker Amperage | 30 Amps |
Wire Size | 10 AWG |
Dimensions (W x D x H) | 15.4"W (390mm) x 13.2"D (335mm) x 23.3"H (590mm) |
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 | Drop IOM |
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 DROP 4.5STU Sauna Heater Package?

It is a 4.5kW wall-mounted sauna heater designed for sauna rooms up to 247 cubic feet.
What makes the DROP sauna heater unique?

It features an award-winning water-drop design, blending aesthetics with efficient heating performance.
What type of sauna is this heater suitable for?

It is designed for home and small commercial saunas, providing a soft, even heat with superior steam generation.
How fast does the heater warm up?

With its 122-pound stone capacity, it heats up quickly while providing long-lasting heat retention.
Is the DROP sauna heater floor-mounted or wall-mounted?

It is a wall-mounted heater, maximizing space while ensuring even heat distribution.
Can I operate the sauna remotely?

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

Yes, the UKU control system can be installed inside or outside the sauna.