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Spring Sale on Now | $100 with code SPRING100 | Free Shipping Over $1,000
Spring Sale on Now | $100 discount with code SPRING100 | Free Shipping Over $1,000

Finnmark FD-4 Hybrid Full Spectrum Infrared 2 Person Sauna

170º Infrared Heat Technology | Authorised Dealer
Original price $7,795.00 - Original price $7,795.00
Original price
Current price $7,795.00
Only 1 left!

Delivery time between 1-2 weeks

30 Day money back guaranty

No Sales tax* Excludes Wyoming

Free Shipping

On orders over $1,000

Free Returns

Within 30 days*

Zero Sales Tax

Excluding Wyoming*


Enjoy the benefits of Infrared Sauna Bathing at 170-degrees Fahrenheit combined with a true Finnish sauna!

Welcome to the ultimate sauna experience. With the Trinity 3-IN-ONE, you will expand your wellness in a way like never before. This sauna combines all the benefits of Finnmark’s UL listed Spectrum Plus infrared heaters, traditional 120V sauna heater, and true medical grade Spectrum Red Light™ Therapy all in one beautiful sauna cabin. This culmination of the perfect sauna experience will remind you that less is not always more. Why settle when you can experience it all? Give yourself the gift of self-care and wellness with Finnmark Design's Trinity 3-IN-ONE.

What's included

  • Finnmark FD-4 Hybrid Full Spectrum 2 Person Infrared Sauna
  • Spectrum LED Near Infrared Ceiling Lights combined with medical grade Spectrum Red Light Therapy
  • Chromotherapy Lighting
  • Harvia Vega Compact 1900 Electric Sauna Heater
  • Built-in LCD touchscreen control panel with Bluetooth audio
  • 30 Day Moneyback Guarantee
  • Limited Warranty 
  • ETL Certification 
  • No Sales Tax (Excluding Wyoming 


    • Anti-microbial Western Canadian cedar interior that protects against mold, bacteria and fungus. 
    • Thermal Plus Aspen exterior that will never rot, warp, decay or chip.  
    • Finnmark Designs is the only infrared sauna manufacturer that combines long-wave carbon 360 infrared panels with UL listed short-wave Spectrum Plus infrared panels.  This combination provides higher temperatures, full body coverage, deeper penetration and an experience better than any other sauna.  Each heater is also strategically placed to offer the highest level of therapy possible. 
    • Built-in LCD touchscreen controller with Bluetooth audio. 
    • 6" HiFi speakers
    • 8mm Tempered Glass
    • Ergonomic Backrest for comfort
    • Removable and adjustable sauna feet for uneven surfaces. 
    • Low EMF sauna tested by a NASA award winning testing facility. 
    • High quality double walled construction with non-toxic wool insulation. 
    • Two-tiered seating

      Specifications and Assembly 

      • Exterior dimensions: 4' W x 4' D x 6.92' H
      • Interior dimensions: 3.67' W x 3.75' D x 6.25' H
      • 86 Cubic Feet
      • Door Dimensions: 23.625" W x 67.875" H 
      • Product Weight: 437 lbs. 
      • Shipping Weight: 485 lbs. 

      Our primary commitment is to ensure your interaction with us is as easy and uncomplicated as possible. Below is information about our shipping policy.

      Shipping Charges

      Free Shipping - On all saunas, hot tubs & heaters
      Sauna Stones - $99
      Dundalk Accessories - $50 
      All other accessories - $30 

      Additional charges may apply in certain locations and circumstances such as:

      • Delivery sites inaccessible by standard carriers (FedEx, UPS) will be charged an LTL freight fee.
      • Roads that cannot accommodate at least Class 6 Size Vehicles, such as remote or island locales.
      • Crates exceeding 92” in length can't be handled by a standard liftgate. If this happens, you'll need to manually unload the crate (with help), employ a moving service, or use forklift equipment. Note: The driver is not allowed to assist in these situations due to insurance constraints.
      • Any delay in receiving your delivery beyond 48 hours from the initial contact by the freight company might result in a daily storage fee of $100.

      Shipment methods and sizes

      Most saunas kits are shipped as kits pre-packaged onto a pallet and sent via LTL.

      Pre-assembled saunas are shipped via flat-bed truck delivery by special appointment. These product will require off-loading from the flat-bed truck by a crane or extended forklift. This is not provided by the courier so you will be responsible for arranging the offloading and transporting the product to its final location.

      Shipping Timeline

      Upon placing your order, you'll promptly receive an "Order Acknowledgment" email, indicating we've got your order details. We will then check with our suppliers to ensure your selected item is ready for dispatch. Most of our off-the-shelf saunas and accessories are primed for quick shipping, whereas tailor-made saunas require more time (refer to the Shipping Timeline below).

      Country: United States
      Shipping Method: FedEx, USPS, and Local Freight Companies.
      Handling Time: 1-2 Days (Monday to Friday)
      Transit Time: 3-5 Days (Monday - Friday) depending on location
      Total Delivery Time: 5-7 business days

      After your order is verified and we've processed your payment, we'll prepare it for shipping. On the day of dispatch, a tracking update will be sent to the email you provided during checkout, allowing you to monitor your shipment with ease.

      Should you not receive any tracking details within 5 business days from your order date, please don't hesitate to connect with us through chat, our contact page, or directly at

      Note: In the event of unforeseen delays, such as extreme weather or supplier issues, one of our customer support specialists will contact you to explain the situation and discuss any changes. 

      Where we ship to

      We ship to all states within the contiguous United States. excluding Alaska, Hawaii, and and US islands. If you're located in these areas or need shipping specifics, please reach out for a detailed quote. Your order will first be sent to the closest freight terminal near you. Upon its arrival, the freight carrier will contact you to schedule a curb-side delivery at your convenience.

      Where we ship from

      All orders are shipped directly from the manufactures warehouse in Illinois &. This ensures the fastest possible delivery at the lowest cost for our customers.
      We do not offer any Chinese or Asian manufactured saunas and all shipments are from inside the United States.

      Receiving Your Order

      The shipping company will contact you to schedule your delivery. Upon arrival:

      1. Inspect Upon Arrival: Before signing any paperwork, take care to inspect your delivered items.
      2. Count & Confirm: Make sure all pieces of your order are present.
      3. Hidden Damages: If you find damages not initially evident during delivery, report them immediately to

      Handling Shipment Damages

      Shipping damages, while uncommon, fall into two categories:

      1. Visible Damage: Damage is evident on the container/crate.
      2. Concealed Damage: Contents are damaged, but the container appears intact.

      For visible damages or if items are missing, it's crucial to make precise notes on the delivery receipt. If concealed damages are found after unboxing, report them within 72 hours. Finnish Sauna Builders will replace any damaged or missing components if reported within this window. Claims made after this period cannot be addressed.


      If you choose to refuse your order upon delivery for reasons other than evident damages or a shipping mistake, you'll be subject to any related shipping charges.

       When you are ready to purchase your items, click the Proceed to Checkout button. Please log in if you have an account with us, if you do not already have an account you will be prompted to create one, or you can checkout as a guest only.

      On your payment screen you will see the total amount of items. Please add your payment method and billing address. accepts a number of payment methods:

      • Apple Pay
      • Diners Club
      • Discover
      • Meta pay
      • Google Pay
      • MasterCard
      • Shop Pay
      • Visa

      How do I know my payment transaction is secure?

      We ensure that every credit card transaction occurs within a secure environment. The payment system has a 128-bit SSL security encryption. You can see the transaction is secure if you see a key lock at the bottom right of your web browser. We do not retain your credit card information after your order is complete. Rather, it is submitted directly to our banks. You can rest assured that with each purchase your credit card or bank account information will be secure. is committed to a safe, enjoyable and smooth online shopping experience for all customers. For your safety, has implemented a payment security screening process. Confirmation of customer details on certain orders may be required prior to the order being processed. Please ensure that you provide accurate and up to date contact information should we need to confirm the security of your order.

      For further inquiries: 

      • Website:
      • Phone number: (844) 933 2021
      • Email:
      • Physical address: 30 N Gould St, Ste R Sheridan Wyoming 82801 United States