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Finnmark FD 5 Trinity Combination Sauna with Infrared and Traditional Steam for Four People

Vendor:

Finnmark

SKU:

FD-KN005

16 Verified Reviews

$6,863.74
+ 🚚 Free shipping

Availability:

in stock, ready to be shipped

Shipping information

Shipping and delivery

Clear delivery expectations so you know what will happen after you place your order.

Where we ship

We primarily deliver to residential and commercial addresses within the continental United States. Availability for Alaska, Hawaii and other regions can vary by brand, so please contact us before ordering if you are outside the mainland U.S.

How orders are shipped

Many products are shipped directly from the manufacturer or authorized distributor. Once an order is processed for shipment, we share any tracking details made available to us by the carrier or supplier. You will always receive an order confirmation email after checkout.

Freight deliveries

Larger and heavier items usually ship via freight with curbside delivery. The carrier may contact you to arrange a delivery window and an adult may need to be present to sign when required. Standard freight service does not include inside delivery or installation unless specifically arranged.

Transparent costs

Any applicable shipping fees are shown clearly in your cart or at checkout before payment. We recommend reviewing access points, stairs and doorway widths ahead of time to help avoid extra carrier handling fees after dispatch.

Have questions about shipping for this product or need delivery guidance
Email support@thermalsanctum.com or call +1 (302) 219 4061. We are happy to help.

Information on this page is for general guidance. Final shipping options and any applicable charges are confirmed at checkout and in your order confirmation email.

Returns 

Returns and peace of mind

Helpful guidance on how returns work at Thermal Sanctum.

Eligibility overview

Many products are eligible for a return or exchange when they are unused, in original packaging and meet the conditions in our Returns and refunds policy. Because requirements can vary by brand and product type, we always review eligibility before confirming a return.

How to request a return

If you would like to request a return, please contact our team with your order number and product details. We will confirm whether the item qualifies under our policy and share the next steps, including any return authorization information.

Condition of returned items

Items typically need to be in new, resaleable condition with all original parts, manuals and accessories included. Products that have been installed, used or modified may not be eligible for a refund except where required by law.

Damaged or incorrect items

If your order arrives damaged or you receive the wrong item, please tell us as soon as possible and include photos of the packaging and product. We will work with you and the manufacturer or carrier to review the issue and arrange a suitable resolution.

Have questions about returns for this product
Email support@thermalsanctum.com or call +1 (302) 219 4061. Our team is happy to help before or after you order.

This section is a general overview only. Full details, including any time limits and fees that may apply, are set out in our Returns and refunds policy.

Best price promise

Best price promise

We want you to feel confident you are receiving excellent value.

Price match review

If you find the same item available from another authorized retailer, let us know before you purchase. Our team can review the advertised price and, where eligible, work to match it.

Authorized dealer pricing

Thermal Sanctum sells products supplied by manufacturers and authorized distributors. Pricing is set in accordance with brand policies to help ensure authenticity, warranty protection and safe delivery.

What we consider

When reviewing a price match request, we consider factors such as availability, identical model and configuration, retailer authorization status, and any shipping or handling charges included in the offer you found.

How to submit a request

Email our team with a link or written quote for the lower advertised price, along with your contact details. We will review the information and reply promptly with next steps.

Have a price match question
Email support@thermalsanctum.com or call +1 (302) 219 4061.

Price match requests are reviewed on a case-by-case basis and must meet brand and dealer policy requirements. Some items or promotions may not be eligible. Full details are available upon request.

Thermal Sanctum

Finnmark FD 5 Trinity 
Combination Sauna with 
Infrared and Traditional 
Steam for Four People.

A true dual-heat sauna combining UL listed full-spectrum infrared panels with a 

traditional steam heater, crafted for a transformative home wellness ritual.

Why Customers Choose the FD-5 Trinity
 

True dual-heat system: full spectrum infrared plus traditional steam

UL listed short-wave Spectrum Plus infrared heaters

Medical grade Spectrum Red Light therapy panel

Antimicrobial Western Canadian cedar interior

Thermal Plus Aspen exterior engineered for long lasting durability

Low EMF design tested by a NASA award winning facility

Reaches high temperatures quickly with deeper infrared penetration.

Extra large two tier seating for comfortable four person use

Why Customers Choose HUUM Drop
 

Technical Details
 

Power:

240V

Infrared Wattage:

2700W

Included Heater:

Harvia KIP 4.5kW

Maximum Temperature:

Infrared 170"F, Traditional 190*F

Interior Dimensions:

71"W × 57.5"D × 75.5"H

Exterior Dimensions:

75"W × 64"D × 83"H

Materials:

Cedar Interior, Thermo Aspen Exterior 
Glass: 8mm Tempered

Warranty:

Limited Residential Warranty

Benefits of Infrared and Traditional Steam

Supports heart health through natural heat

Promotes detoxification with deeper sweat

Removes up to 17 percent more toxins than standard infrared

Enhances recovery for athletes

Helps improve skin clarity and circulation

Provides the comfort of steam plus deep therapeutic infrared

What is Included in Your Package

Sauna Cabin Components

Bottom Panel

Top Panel

Back Panel

Front Panel

Left Panel

Right Panel

Glass Door

Bench System (two tier)

Screws and fasteners

Bench Top

Removable adjustable feet

Door Handle

Heating System Components

Full Spectrum Infrared Panels

Harvia 4.SkW Traditional Sauna Heater

1 Box Harvia AC3000 Stones (44 Ibs)

Lighting & Controls

Spectrum LED near infrared

ceiling lights

Medical grade red light therapy

Controller 2.0 built in LCD WI-Fi

touchscreen panel

Bluetooth audio system

Cables

Manuals and Documents

Installation & Operation Manual

V2 LCD Controller Manual

EMF TestLog

UL Listing

Harvia Heater Manual

Warranty

About This Delivery:

This sauna ships secured on a protective wooden pallet and requires a scheduled delivery appointment. The driver will provide curbside

delivery. Prior to shipment, customers may be contacted to review delivery conditions and ensure a smooth arrival.

Thermal Sanctum

Finnmark FD 5 Trinity  Combination Sauna with Infrared and Traditional  Steam for Four People.

A true dual-heat sauna combining UL listed full-spectrum infrared panels with a traditional steam heater, crafted for a transformative home wellness ritual.

Why Customers Choose the FD-5 Trinity

True dual-heat system: full spectrum infrared plus traditional steam

UL listed short-wave Spectrum Plus infrared heaters

Medical grade Spectrum Red Light therapy panel

Antimicrobial Western Canadian cedar interior

Thermal Plus Aspen exterior engineered for long lasting durability

Low EMF design tested by a NASA award winning facility

Reaches high temperatures quickly with deeper infrared penetration

Extra large two tier seating for comfortable four person use

Technical Details

Power:

240V

Infrared Wattage:

2700W

Included Heater:

Harvia KIP 4.5kW

Maximum Temperature:

Infrared 170"F, Traditional 190*F

Interior Dimensions:

71"W × 57.5"D × 75.5"H

Exterior Dimensions:

75"W × 64"D × 83"H

Materials:

Cedar Interior, Thermo Aspen Exterior Glass: 8mm Tempered

Warranty:

Limited Residential Warranty

What is Included in Your Package

Sauna Cabin Components

Sauna Panels

Glass Door

Bench System (two tier)

Bench Top

Removable adjustable feet

Door Handle

Heating System Components

Full Spectrum Infrared Panels

Harvia 4.SkW Traditional Sauna Heater

1 Box Harvia AC3000 Stones (44 Ibs)

Lighting & Controls

Spectrum LED near infrared

ceiling lights

Medical grade red light therapy

Controller 2.0 built in LCD WI-Fi

touchscreen panel

Bluetooth audio system

Cables

Manuals and Documents

Installation and Operation Manual

V2 LCD Controller Manual

EMF Test Log

Harvia Heater Manual

Warranty

About This Delivery:

This sauna ships secured on a protective wooden pallet and requires a scheduled delivery appointment. The driver will provide curbside delivery. Prior to shipment, customers may be contacted to review delivery conditions and ensure a smooth arrival.

Them

Customer Support

Real specialists who respond quickly and guide you with care

Slow replies, automated
systems, no real help

Order Processing

Orders confirmed and processed fast with real time tracking

Orders sit in queues with
unclear updates

Shipping

Fast and fully trackable shipping
nationwide

Basic shipping with long delivery windows

Pricing

Structure

Transparent pricing and price match
support

Hidden fees and unclear terms

Returns & Warranty

Clear returns and strong warranty
protection

Complicated and frustrating
return processes

Frequently asked questions

What are the dimensions of the Finnmark FD-5 Sauna?

The exterior dimensions are 75 inches in width, 64 inches in depth, and 83 inches in height. The interior dimensions are 71 inches in width, 57.5 inches in depth, and 75.5 inches in height.

How many people can it accommodate

The Finnmark FD-5 Trinity XL Infra-Steam Sauna is designed to comfortably accommodate up to four individuals.

What is the power requirement for this sauna?

The sauna operates on a 240V electrical system. The infrared heaters consume 2,700 watts, and the traditional steam heater is rated at 4.5 kW.

What materials are used in the construction

The interior is crafted from antimicrobial Western Canadian cedar, known for its resistance to mold and bacteria. The exterior is made from Thermal Plus™ Aspen, which is durable and resistant to warping and decay.

Does the sauna include any entertainment features?

Yes, the sauna is equipped with an LCD touchscreen controller that includes Bluetooth audio capabilities, allowing users to enjoy music or other audio during their sauna sessions.

Is it suitable for home installation

Absolutely, the Finnmark FD-5 Trinity XL Infra-Steam Sauna is designed for home use and can be installed in a suitable indoor space with the appropriate electrical setup.

What is the total shipping weight

The sauna weighs approximately 575 pounds, with a shipping weight of around 654 pounds, including the pallet.

Them

Support

Real specialists who respond quickly
and guide you with care

Slow replies, automated
systems, no real help

Order Processing

Orders confirmed and processed fast
with real time tracking

Orders sit in queues with
unclear updates

Shipping

Fast and fully trackable shipping
nationwide

Basic shipping with long
delivery windows

Pricing

Transparent pricing and price match
support

Hidden fees and unclear
terms

Returns and
Warranty

Clear returns and strong warranty
protection

Complicated and frustrating
return processes

Frequently asked questions

What are the dimensions of the Finnmark FD-5 Sauna?

The exterior dimensions are 75 inches in width, 64 inches in depth, and 83 inches in height. The interior dimensions are 71 inches in width, 57.5 inches in depth, and 75.5 inches in height.

How many people can it accommodate

The Finnmark FD-5 Trinity XL Infra-Steam Sauna is designed to comfortably accommodate up to four individuals.

What is the power requirement for this sauna?

The sauna operates on a 240V electrical system. The infrared heaters consume 2,700 watts, and the traditional steam heater is rated at 4.5 kW.

What materials are used in the construction

The interior is crafted from antimicrobial Western Canadian cedar, known for its resistance to mold and bacteria. The exterior is made from Thermal Plus™ Aspen, which is durable and resistant to warping and decay.

Does the sauna include any entertainment features?

Yes, the sauna is equipped with an LCD touchscreen controller that includes Bluetooth audio capabilities, allowing users to enjoy music or other audio during their sauna sessions.

Is it suitable for home installation

Absolutely, the Finnmark FD-5 Trinity XL Infra-Steam Sauna is designed for home use and can be installed in a suitable indoor space with the appropriate electrical setup.

What is the total shipping weight

The sauna weighs approximately 575 pounds, with a shipping weight of around 654 pounds, including the pallet.

Reviews

5.0

Based on 16 verified sauna reviews

98 percent of customers would recommend Thermal Sanctum.

5 (16)

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4 (0)

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3 (0)

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Average ratings

  • Heat performance

  • Build quality

  • Comfort

  • Ease of installation

  • Value

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Excellent

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Exceptional

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Very comfortable

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Very easy

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Below expected value

Exceptional value

Reviews

5.0

Based on 16 verified sauna reviews

99 percent of customers would recommend Thermal Sanctum.

5 (16)

Title

4 (0)

Title

3 (0)

Title

1 (0)

Title

2 (0)

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average ratings

How strong and consistent is the heat output?

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Very poor

Excellent

How would you rate the construction quality and durability?

Title

Entry Level

Exceptional

How comfortable is this sauna to use?

Title

Less comfortable

Very comfortable

How simple was the installation process?

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Challenging

Very easy

How would you rate the overall value for the price?

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Exceptional value

5

• 2 months ago

I did a lot of research before buying

I did a lot of research before buying the Finnmark Designs Trinity, and Im so glad I went with Thermalsanctum. I reached out to them a few times before making my purchase and they always were really patient and helpful. I was worried about getting the wrong model or having issues with setup, but everything went smoothly. The sauna gets up to 170 degrees with no problems and I love that I can use the infrared on its own or add steam. The cedar wood smells amazing and the quality is top-notch. It was delivered on time, and putting it together wasnt too difficult. Ive been using it almost every day since it arrived, and I already feel more relaxed and less sore after workouts. Happy days.

Wade S. • Verified sauna owner - Finnmark FD-5

Verified buyer

Title

5

• 2 months ago

Looks incredible in my home

Not gonna lie, this sauna is a statement piece. Everyone who visits my house stops to admire it, it just looks so high-end. But it’s not just looks, the functionality is top-tier. The heat gets up to 170°F no problem, and the ability to switch between traditional steam and infrared is a dream. It took a while to put together (a few hours), but once it was done, it was perfect. If you're serious about saunas, Finnmark is the way to go.

Harlan D. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Took a while, but worth every second

first saw the FD-5 on an ad and thought it looked insane. I already had an old infrared sauna but wanted something better, so I pulled the trigger. Radian sactuary was great, kept me updated on shipping (it was backordered but I waited). Finally got it, and WOW. It’s gorgeous. The heat? Next level. The steam option? A game-changer. I literally use it daily and can’t believe I waited this long to get a real hybrid sauna. If you’re thinking about it, just do it.

Derek L. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Everything I hoped for

This unit is everything I hoped it would be, spacious, beautifully designed, and very effective. Whether I’m using the full-spectrum infrared or the traditional steam option, every session leaves me feeling rejuvenated, relaxed, and deeply restore

Tyson P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Checks every box

Installation took a bit of time and care, it’s a solid unit but the instructions were clear and manageable. Happy with the final product.

Denton P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Has been a fantastic addition to my wellness routine.

Has been a fantastic addition to my wellness routine. Offers a comprehensive relaxation experience. The build quality is excellent, and the cedar interior adds a pleasant aroma and look.

Xavier M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Better than expected!

I’m very impressed with the quality. I admit I was nervous ordering such a large item online without seeing it in person first, but it didn't disappoint. The wood finish is beautiful and feels very premium. I’ve already showed it off to my neighbors and they are jealous! Delivery was smooth too.

Jordan M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

I did a lot of research before buying

I did a lot of research before buying the Finnmark Designs Trinity, and Im so glad I went with Thermalsanctum. I reached out to them a few times before making my purchase and they always were really patient and helpful. I was worried about getting the wrong model or having issues with setup, but everything went smoothly. The sauna gets up to 170 degrees with no problems and I love that I can use the infrared on its own or add steam. The cedar wood smells amazing and the quality is top-notch. It was delivered on time, and putting it together wasnt too difficult. Ive been using it almost every day since it arrived, and I already feel more relaxed and less sore after workouts. Happy days.

Wade S. • Verified sauna owner - Finnmark FD-5

Verified buyer

Title

5

• 2 months ago

Looks incredible in my home

Not gonna lie, this sauna is a statement piece. Everyone who visits my house stops to admire it, it just looks so high-end. But it’s not just looks, the functionality is top-tier. The heat gets up to 170°F no problem, and the ability to switch between traditional steam and infrared is a dream. It took a while to put together (a few hours), but once it was done, it was perfect. If you're serious about saunas, Finnmark is the way to go.

Harlan D. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Took a while, but worth every second

first saw the FD-5 on an ad and thought it looked insane. I already had an old infrared sauna but wanted something better, so I pulled the trigger. Radian sactuary was great, kept me updated on shipping (it was backordered but I waited). Finally got it, and WOW. It’s gorgeous. The heat? Next level. The steam option? A game-changer. I literally use it daily and can’t believe I waited this long to get a real hybrid sauna. If you’re thinking about it, just do it.

Derek L. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Everything I hoped for

This unit is everything I hoped it would be, spacious, beautifully designed, and very effective. Whether I’m using the full-spectrum infrared or the traditional steam option, every session leaves me feeling rejuvenated, relaxed, and deeply restore

Tyson P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Checks every box

Installation took a bit of time and care, it’s a solid unit but the instructions were clear and manageable. Happy with the final product.

Denton P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Has been a fantastic addition to my wellness routine.

Has been a fantastic addition to my wellness routine. Offers a comprehensive relaxation experience. The build quality is excellent, and the cedar interior adds a pleasant aroma and look.

Xavier M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Better than expected!

I’m very impressed with the quality. I admit I was nervous ordering such a large item online without seeing it in person first, but it didn't disappoint. The wood finish is beautiful and feels very premium. I’ve already showed it off to my neighbors and they are jealous! Delivery was smooth too.

Jordan M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

So far so good. Love the hybrid combo.

We have had this for about 4 weeks now and really enjoying the Hybrid features. the perfect compromise. for my wife and I.

Eric P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Most days I use only the infrared

Most days I use only the infrared for a good sweat and muscle recovery, but if I want more intense heat, I add steam. Assembly was pretty straightforward, 2 man job. The build quality is so good. . Overall, im very pleased with my purchase

Jordan M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

I would say that the Sauna kills inflammation

I would say that the Sauna kills inflammation, and anything growing in you. This Sauna would help anyone suffering from health problems. 

L.G. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Great Sauna

We wanted the health benefits of infrared and warmth of a traditional sauna so we got the hybrid. Only the infrared is plugged in now and it is warm enough. I am not sure we are going to plug/install the traditional heater since we may need to have an electrician update the circuit. Thanks!

Susan F. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

New Sauna

Love it, excellent so far

Mike T. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Worth the wait

I am only using the infrared because my traditional heater unit has still not arrived. However, I will tell you that the sauna was certainly worth the wait. It heats up very quickly within 30 minutes. It’s at 160 to 170 Fahrenheit. The shipping has taking a little long, but other than that this is as good as it gets.

Jeff B. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Finnmark is an Awesome sauna works great gets to 170 everyday

We had a very good experience with Radiant Sanctuary sales person Donald. Over a period of several months I called him many times to make sure I understood what I was getting to help me figure out what the best sauna for us, and to assure me that if there was a problem he would help us. There was no problem. Everything went perfectly. We are very happy we give Donald 10 and we give the Sauna Finnmark hybrid F-D 4 a 10 as well we could not be happier. We were so worried we would buy the wrong one and now we know that we chose the correct sauna for us. We wanted to Sauna to get really hot and this one does the job. The wood is super good quality smells so good and brand new! Everything works correctly.

Lawrence C. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

It was delivered on time and it wasn’t too difficult to put together.

It was delivered on time and it wasn’t too difficult to put together. I do recommend however getting the wires through the top before you try to put it on set it on a box and then take the top panel off and then stick the wires to their appropriate holes so when you put it on the top, you can connect them properly to the ones coming out of the sauna box makes it easier this way when you put it on.  

 

Thank you to the team at radiant ssanctuary for helping us purchase this wonderful health benefit.

Anonymous • Finnmark FD-5

Verified buyer

5

• 2 months ago

I lost 15 pounds in two months

I lost 15 pounds in two months without even trying. I wasn’t even dieting I think I lost inflammation. I feel better and healthier since starting using it. We love our Sauna.

Anonymous • Finnmark FD-5

Verified buyer

5

• 2 months ago

So far so good. Love the hybrid combo.

We have had this for about 4 weeks now and really enjoying the Hybrid features. the perfect compromise. for my wife and I.

Eric P. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Most days I use only the infrared

Most days I use only the infrared for a good sweat and muscle recovery, but if I want more intense heat, I add steam. Assembly was pretty straightforward, 2 man job. The build quality is so good. . Overall, im very pleased with my purchase

Jordan M. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

I would say that the Sauna kills inflammation

I would say that the Sauna kills inflammation, and anything growing in you. This Sauna would help anyone suffering from health problems. 

L.G. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Great Sauna

We wanted the health benefits of infrared and warmth of a traditional sauna so we got the hybrid. Only the infrared is plugged in now and it is warm enough. I am not sure we are going to plug/install the traditional heater since we may need to have an electrician update the circuit. Thanks!

Susan F. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

New Sauna

Love it, excellent so far

Mike T. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Worth the wait

I am only using the infrared because my traditional heater unit has still not arrived. However, I will tell you that the sauna was certainly worth the wait. It heats up very quickly within 30 minutes. It’s at 160 to 170 Fahrenheit. The shipping has taking a little long, but other than that this is as good as it gets.

Jeff B. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

Finnmark is an Awesome sauna works great gets to 170 everyday

We had a very good experience with Radiant Sanctuary sales person Donald. Over a period of several months I called him many times to make sure I understood what I was getting to help me figure out what the best sauna for us, and to assure me that if there was a problem he would help us. There was no problem. Everything went perfectly. We are very happy we give Donald 10 and we give the Sauna Finnmark hybrid F-D 4 a 10 as well we could not be happier. We were so worried we would buy the wrong one and now we know that we chose the correct sauna for us. We wanted to Sauna to get really hot and this one does the job. The wood is super good quality smells so good and brand new! Everything works correctly.

Lawrence C. • Verified sauna owner - Finnmark FD-5

Verified buyer

5

• 2 months ago

It was delivered on time and it wasn’t too difficult to put together.

It was delivered on time and it wasn’t too difficult to put together. I do recommend however getting the wires through the top before you try to put it on set it on a box and then take the top panel off and then stick the wires to their appropriate holes so when you put it on the top, you can connect them properly to the ones coming out of the sauna box makes it easier this way when you put it on.  

 

Thank you to the team at radiant ssanctuary for helping us purchase this wonderful health benefit.

Anonymous • Finnmark FD-5

Verified buyer

5

• 2 months ago

I lost 15 pounds in two months

I lost 15 pounds in two months without even trying. I wasn’t even dieting I think I lost inflammation. I feel better and healthier since starting using it. We love our Sauna.

Anonymous • Finnmark FD-5

Verified buyer