HUUM UKU Extension Box 63 (UKU Ext Box) for High-Power Sauna Heaters – 240V 2x63A

• HUUM UKU Extension Box 63 (commonly referred to as UKU Ext Box)
• Intended for use with UKU Wi-Fi and UKU Local controller models
• Electrical rating: 240V, 2 × 63A, 60 Hz
• HUUM extension-box wiring scheme is used for higher-power heater connections (per HUUM wiring instructions)
• Mounting: wall-mounted; HUUM specifies fastening the unit to the wall with four screws
• Placement: HUUM specifies locating the extension box outside the steam/sauna room, near the UKU main module

• Power / Electrical: 240V, 2 × 63A, 60 Hz (hardwired)
• Capacity/Performance: Extension-box wiring interface for higher-output HUUM heater connections under UKU control systems
• Warranty: Limited warranty terms apply; warranty period depends on product category and use type (private vs. commercial)
• Model/MPN/UPC/GTIN: SKU/MPN H2003012 | Model: UKU Ext Box

When you move into larger sauna heater sizes, the control system requirements change. The UKU Ext Box is the HUUM-specific add-on that supports the extension-box wiring scheme for higher-output heater installations under a UKU control system. It’s purpose-built to integrate cleanly with UKU Wi-Fi or UKU Local setups so your sauna controls remain consistent even as heater power increases.

For installers and sauna owners, this is the “right part for the job” when your heater selection or wiring plan calls for an extension box—helping ensure your electrical setup matches HUUM’s documented connection method for high-power models.

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.