Authorized DealerFree Curbside DeliveryShop Pay Installments (subject to approval)
Strength & Wellness Supply · Saunas
SKU · FD-KN003

Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna

Finnmark Designs' 4-person Full Spectrum infrared sauna. Spectrum Plus heaters reaching 170°F, Canadian Aspen exterior + Western Red Cedar interior, 8mm tempered glass. Lifetime heater warranty + 10-year craftsmanship coverage. 240V/15A dedicated circuit. Free LTL freight.

Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna
$6,495$6,495
or about $541/mo with Shop Pay Installments (subject to approval)
Order now to be ready for the cold season. Once it ships, freight delivery typically takes about 1–2 weeks.
Guaranteed best priceYou're paying the manufacturer's floor price, no authorized dealer can advertise it lower.
Arrives perfect, or we make it rightIt ships by freight; if it's damaged in transit, you deal with us, not the carrier. We handle the claim and the fix.
The right fit, the first timeOur specialists match you to the right model for your space and budget before you buy.
Free curbside delivery
White-glove available.
Manufacturer warranty
Honored in full.
Shop Pay Installments
Subject to approval.
Phoenix-based support
Same-day reply.
Key Features
  • Spectrum Plus full-spectrum infrared (NIR + MIR + FIR)
  • Maximum cabin temperature 170°F
  • 3.1 kW heater rating
  • Canadian Aspen exterior + Western Red Cedar interior
  • 8mm tempered glass door + side panels
  • Lifetime warranty on Spectrum Plus heaters
  • 10-year craftsmanship + electrical warranty
  • Bench seating for 3-4 adults
  • Antimicrobial cedar interior, natural mold/bacteria resistance
  • 240V/15A dedicated circuit
  • Free LTL curbside delivery
Questions? Call(602) 883-2804·or text(623) 300-0464
Authorized DealerDirect from manufacturer
Free Curbside DeliveryWhite-glove available
Shop Pay InstallmentsSubject to approval
Manufacturer WarrantyFully honored
Phoenix-Based ExpertsNo-pressure guidance
Before You Order

The 3 things buyers check first

What size is it?
3 to 4 Person
72" W x 46" D x 78" H
What does it plug into?
240V / 15A single phase
Needs a dedicated circuit, an electrician sets this up.
How is it set up?
Indoor residential, IR panels top-ceiling mount

Full specs are listed below. Questions? Call (602) 883-2804, Phoenix-based, 7am–7pm AZ.

Is this the one?

Is the Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna right for you?

A quick gut-check from this sauna's own specs, and the closest alternatives so you can compare without leaving the page.

A great match if…
  • You need a cabin that seats 3 to 4 person.
  • You want spectrum plus full-spectrum incoloy infrared.
  • Your install can support 240V / 15A single phase.
  • It's going indoor residential, ir panels top-ceiling mount.
Compare with similar saunas
Not sure this is the right size or heat type? We'll match you in a couple of minutes.
Still comparing?

Get the free buyer's guide before you decide.

Most buyers compare three or four models before choosing. Our 12-page guide puts the top saunas side by side, sizes, EMF tiers, install and financing, so you can be sure the Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna fits your space and budget.

Find My Sauna · Step 1 of 4
Find your sauna in under a minute

Answer 4 quick questions and see your 2 to 3 best-fit models with real prices and monthly payment options (subject to approval). No email required to see your matches.

Where will your sauna go?

§ 02 · Specs Snapshot

The numbers.

SKU FD-KN003
Model
FD-KN003 (FD-3)
Capacity
3 to 4 Person
Heater Type
Spectrum Plus Full-Spectrum Incoloy Infrared
Heater Rating
3.1 kW (3,150 W)
Max Temperature
170°F
Exterior Wood
Canadian Aspen
Interior Wood
Western Red Cedar (antimicrobial)
Glass
8mm tempered (bronze tinted)
Exterior Dimensions
72" W x 46" D x 78" H
Interior Dimensions
67" L x 41" W x 70" H
Room Volume
111.3 cubic feet
Sauna Weight
488 lbs
Shipping Weight
536 lbs (LTL pallet)
Electrical
240V / 15A single phase
Installation
Indoor residential, IR panels top-ceiling mount
Warranty
Lifetime heaters; 10 year craftsmanship + electrical
§ 03 · The Story

Why this model.

The Finnmark FD-3 is the family-size Full Spectrum infrared sauna in Finnmark Designs' premium line. 72" wide × 46" deep with bench seating for 3 to 4 adults, the FD-3 pairs Spectrum Plus full-spectrum heating with the same lifetime-warranty premium build as the FD-2.

Spectrum Plus Full-Spectrum Heaters, 3.1 kW

The FD-3 uses Finnmark's Spectrum Plus incoloy heaters across the back, side, and ceiling, delivering near-, mid-, and far-infrared wavelengths from a single cabin. Heater rating: 3.1 kW (3,150 W). Maximum cabin temperature: 170°F, higher than typical infrared cabins.

Premium Wood Construction

Canadian Aspen exterior + Western Red Cedar interior, same construction as the FD-2 but in 4-person scale. Bronze tinted 8mm tempered glass door with side panels. Antimicrobial cedar interior naturally resists mold and bacteria.

Lifetime Heater Warranty + 10-Year Craftsmanship

The FD-3 carries Finnmark's strongest warranty package, lifetime warranty on Spectrum Plus heaters and 10-year coverage on cabinet craftsmanship + electrical components. The FD-3 is built to be a multi-decade home wellness investment.

Dedicated 240V/15A Circuit Required

Higher heater rating means the FD-3 needs a 240V/15A dedicated circuit, an electrician is recommended for safe installation. Ships via LTL freight with free US 48 curbside delivery.

What's Included

  • Capacity: 3 to 4 person
  • Heater: Spectrum Plus full-spectrum infrared (incoloy), 3.1 kW
  • Max Temperature: 170°F
  • Exterior Wood: Canadian Aspen
  • Interior Wood: Western Red Cedar (antimicrobial)
  • Glass: 8mm tempered (bronze tinted)
  • Exterior Dimensions: 72"W × 46"D × 78"H
  • Room Volume: 111.3 cubic feet
  • Electrical: 240V / 15A single phase
  • Warranty: Lifetime on Spectrum+ heaters; 10-year craftsmanship + electrical
  • Indoor residential use only
Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna
§ 04 · Assurance

Delivery, financing, warranty, handled.

Free Curbside Delivery
Most orders ship free. White-glove available on request.
Shop Pay Installments
Split payments at checkout, subject to approval.
Manufacturer Warranty
Honored in full, never outsourced.
Phoenix-Based Support
Direct specialist access, same-day reply.
How do I know this is the right one for me?
Text us your room dimensions, how many people will use it, and your budget. A Phoenix-based specialist sends back 2 to 3 honest picks that actually fit, usually within a few hours. No phone call needed, no pressure. Text (623) 300-0464 or email support@strengthwellnesssupply.com.
Should I order now or keep comparing?
Comparing is smart on a purchase this size. The things actually worth comparing are fit for your space, the warranty and authorized-dealer support behind it, and delivery timing. If you want it ready for the cold months, ordering sooner helps, since freight delivery typically takes about 1 to 2 weeks once it ships. If you are torn between two models, text us at (623) 300-0464 and a specialist will give you a straight answer, no pressure.
What's the actual delivery experience?
Freight carrier calls to schedule a delivery window. They offload to the end of your driveway (curbside). White-glove in-home setup is available on request and quoted at the time of order.
How long does assembly take?
Indoor infrared saunas: 2–3 hours with one helper, no special tools required. Outdoor barrels and home-gym equipment: 3–5 hours, typically two adults. Every product ships with step-by-step instructions.
Is financing available?
Yes. We offer Shop Pay Installments at checkout. Monthly payments vary by product and are subject to approval. No rate is guaranteed until the application is reviewed.
What warranty is included?
Every product includes the full manufacturer warranty, the same coverage as buying direct from the brand. We're an authorized dealer for every product we carry.

Questions about the Finnmark FD-3 Full Spectrum 4-Person Infrared Sauna?

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