The Hot Box Sauna XL

Name: The Hot Box Sauna XL
Brand: The Hot Box Sauna
SKU: THB-XL-1
Price: 6900.0 USD
Availability: InStock

by The Hot Box Sauna

$6,900.00 - $7,200.00

$6,900.00

$6,900.00 - $7,200.00

$6,900.00

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Infrared & Red Light Sauna

The Hot Box Sauna XL

The XL is the two-person Hot Box, and it is 17.5 inches wider than the Standard at 48 inches across. That extra width is what turns a single seat into a bench for two, and the 57-inch interior length is what lets one person lie down for the session.

It still runs on a wall outlet. 120V at 60Hz, 15 amps, 1600 watts at maximum, reaching 220°F — so the wider cabin does not bring a 220V circuit with it. The Hot Box's claim for that is specific: they say they are the only sauna achieving traditional temperatures on standard household power. No electrician, no foundation, no structure permit, and about ten minutes to assemble.

Room to lie down No 220V install Flat-packs in 15 minutes Built in Reno, Nevada

The Hot Box Sauna XL, a wide wood cabin with red light glowing out from inside

Version 7

Four Hundred Extra Watts And Nowhere To Waste Them

The XL heats a cabin roughly twice the floor area of the Standard on 400 more watts, all of it still inside a 15-amp limit. That arithmetic is why the V7 changes are mostly about heat retention.

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Roof Panel Heat Reflection

Stainless steel heat reflectors backed by wool insulation sit in the upgraded roof panel, pushing heat back down into the cabin and raising its R-value. On the larger of the two models this is the change that matters most, and The Hot Box credits it with V7's 30% faster preheat and higher peak temperature.

30% Faster Preheat

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Heater 4.0, 1600W

The XL runs the same fourth-generation heater at a higher ceiling: 1600 watts against the Standard's 1200. The V7 housing is more open, which The Hot Box says maximizes heat and infrared delivery, with an internal Faraday cage covering safety. Heater assembly and bulbs ship with the sauna.

Internal Faraday Cage

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High-Temp Lid Gasket

A high-temperature gasket seals the lid shut, which is where consistent cabin temperature comes from once the sauna is up to heat. The lid itself rides on an aluminium V-track and trolley that The Hot Box describes as butter-smooth with lifetime reliability.

Aluminium V-Track

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10-Foot 12-Gauge Cord

A 10-foot American-made 12-gauge power cord ships with the sauna. The Hot Box specifies that gauge and length to deliver full power to the heater and to remove the need for an extension cord, which is the usual source of voltage drop on a 15-amp appliance.

No Extension Cord

Why Athletes Choose This

Eight Reasons To Size Up To The XL

Every line below is a specification of this sauna or a term of the way The Hot Box sells it.

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Seats two people

48" Wide

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Takes one person up to 6'8"

57" Interior

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Reaches 220°F

1600W Max

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Plugs into a normal outlet

120V · 15A

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No foundation or permit

Not A Structure

📦

Flat-packs in 10 to 15 minutes

Moves With You

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Heater, bulbs and WiFi included

Nothing To Add

🇺🇸

Built in Reno, Nevada

Small Batches

A Closer Look

Inside The XL

Overhead view of a woman lying full length on the bench inside The Hot Box Sauna XL

Interior Length

Fifty-Seven Inches Is Enough To Stop Sitting Up

The XL interior runs 57 inches long, 45 inches wide and 45 inches high. That length is the practical difference between the two models: it lets a single occupant stretch out for the session, and The Hot Box rates the cabin for one person up to 6'8", five inches taller than the Standard allows.

Interior 57" L × 45" W × 45" H
Exterior 60" L × 48" W × 48" H
Rated for one person up to 6'8"
420 lbs assembled

Room To Lie Down Up To 6'8"

Two people sitting together on the bench inside The Hot Box Sauna XL under red light

Two Occupants

Forty-Eight Inches Across Makes It A Bench

The XL is 48 inches wide against the Standard's 30.5, and 45 inches of that is interior. The Hot Box rates it for two people. A shared sauna is a different proposition from a solo one. Sessions become something two people do together, which changes how often the cabin actually gets used.

Rated for two occupants
45 inches of interior width
17.5 inches wider overall than the Standard
Back rest and hemp cushion available separately

2 Person 45" Interior Width

The diamond-shaped infrared and red light emitter glowing on the wall inside The Hot Box Sauna XL

Heater 4.0

Sixteen Hundred Watts Inside A Fifteen-Amp Limit

The XL takes the heater to 1600 watts, up from 1200 on the Standard, while the circuit stays at 120V and 15 amps. Heater 4.0's V7 revision opened the housing up, which The Hot Box says maximizes heat and infrared reaching the occupant, with an internal Faraday cage handling safety. The assembly and bulbs are included, so there is no heater to specify.

1600W maximum draw
Heater assembly and bulbs included
Internal Faraday cage
Infrared and red light from one unit

1600W Included

Flat wood wall panels from a Hot Box Sauna standing on edge against a dark background

Flat-Pack

A 420 Pound Sauna That Fits Through A Doorway

A 60 by 48 inch cabin will not go through most interior doors assembled. The XL does not have to: it breaks down into flat panels in 10 to 15 minutes and rebuilds on a custom rail system in about ten. That is what makes a two-person sauna viable in a basement, a spare room upstairs, or a house you plan to leave.

Breaks down in 10 to 15 minutes
Reassembles on the custom rail system
No foundation and no permanent installation
420 lbs assembled, carried as panels

Custom Rail System Tight Spaces

The Hot Box Lineup

Two Sizes, One Wall Outlet

Both models hit 220°F on 120V and 15 amps, both flat-pack, and both ship with the heater assembly, bulbs and WiFi adaptor. What separates them is how many people get in and whether you can lie down. The XL is the two-person cabin.

Standard

The one-person cabin, and the smaller footprint of the two at 30.5 inches wide.

One person up to 6'3" 1200W max · 120V · 15A 53" × 30.5" × 43" exterior 320 lbs

Shop the Standard

You're Here

The Hot Box Sauna XL with red light glowing from inside the cabin

Seats two, or takes one person up to 6'8" with enough length to lie down.

Two people, or one up to 6'8" 1600W max · 120V · 15A 60" × 48" × 48" exterior 420 lbs

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Questions

Frequently Asked Questions

The Hot Box rates it for two people, or one person up to 6'8". Interior width is 45 inches across a 57-inch length, which is what makes the second seat work. If you only ever plan to use it alone and you are under 6'3", the Standard covers that for a smaller footprint.

The interior is 57 inches long, and The Hot Box's own photography shows a single occupant lying full length on the bench. At 4 feet 9 inches of interior length it is not a full-height lie-flat for a tall adult, so treat it as room to stretch out. The Standard's 50-inch interior does not offer this at all.

No. The XL runs on 120V at 60Hz, 15 amps, 1600 watts maximum — a standard household outlet, same as the Standard model. The extra 400 watts over the Standard stays inside the same 15-amp limit. A 10-foot 12-gauge American-made cord ships with it so no extension cord is needed. Give it a circuit it does not share with another heavy draw.

The Hot Box rates it at 220°F, and describes itself as the only sauna achieving traditional temperatures on standard household power. V7 brought a 30% faster preheat and a higher maximum temperature than the previous version, attributed to the reworked roof panel and heater, on the same wattage.

Exterior is 60" long × 48" wide × 48" high. Interior is 57" long × 45" wide × 45" high. Assembled weight is 420 lbs. Plan the room around the exterior figure, but measure your doorways against the flat panels, since it is built in place.

None of the three. The Hot Box quantifies what that saves: $3,000 to $5,000 for an electrician to install a 220V line, $1,000 to $3,000 for a foundation, and $500 or more for a structure permit. The sauna plugs into an existing outlet, sits on the floor, and is not a permanent structure.

About 10 minutes to assemble and 10 to 15 minutes to break down, on a custom rail system. There is no foundation to pour and no fixed installation, so assembly is the entire setup job.

Assembled, probably not — which is why it arrives flat-packed and is built in the room. The panels go in individually and the cabin assembles on its rail system in about ten minutes. The same works in reverse for moving house or freeing up the floor space.

Every sauna ships with the heater assembly, bulbs and a WiFi adaptor, plus the 10-foot 12-gauge power cord. No separate heater to choose or buy.

The Hot Box lists it as infrared and red light, reaching what they describe as traditional temperatures at 220°F. Both come from the same heater unit and the bulbs are included. Replacement infrared bulbs are available separately.

It ships with every sauna as standard, listed alongside the heater assembly and bulbs. For exactly what the app controls and which platforms it supports, ask us before ordering — we would rather confirm that with the builder than guess at feature detail here.

V7 is the current build, reached after The Hot Box delivered more than 300 saunas. Eight changes: 30% faster preheat and a higher maximum temperature; Heater 4.0 with an internal Faraday cage and a more open housing; an upgraded roof panel with stainless steel heat reflectors and wool insulation for a higher R-value; an aluminium V-track and trolley for the lid; a high-temperature lid gasket; a 10-foot American-made 12-gauge power cord; revised structural methods; and fade-resistant stainless steel logos.

Currently 3 to 4 months for the XL. The Hot Box builds in small batches from their Reno workshop, and they are direct about seasonality: lead times roughly triple the closer it gets to winter. Order well ahead if you want it for the cold months.

In Reno, Nevada, in small batches, following a recent workshop expansion. The power cord is specified as American-made.

The Hot Box does not publish an indoor or outdoor rating, so we will not claim one. A sauna cover is offered as an accessory and The Hot Box also sells an outdoor shower, which suggests outdoor placement is contemplated. Ask us before planning an outdoor install and we will confirm the requirements with the builder.

Two options are specified with the sauna: a window, and the Custom Sauna Mantra, which engraves up to 40 characters of your own text into the wood. Both are set at order. Separate accessories include a back rest, a sauna cover, a 100% hemp cushion, a thermometer, replacement infrared bulbs and an outdoor shower.

The sauna ships flat-packed, at 420 lbs assembled weight. Because The Hot Box is a new brand for us, contact us before ordering and we will confirm the current freight arrangement, transit time and what the carrier will and will not do at your address. We would sooner confirm those details than quote terms that may not apply to this builder.

The Hot Box does not publish warranty terms on the product page, so we are not going to state any here. Contact us for the current written warranty and return terms before ordering. The one durability claim they make is on the lid mechanism, where the aluminium V-track and trolley are described as having lifetime reliability.

The Hot Box points buyers to more than 90 five-star Google reviews alongside customer photos and testimonials, across a run of over 300 saunas and seven versions of the design.

Dimensions

Exterior: 60"L × 48"W × 48"H

Interior: 57"L × 45"W × 45"H

Weight: 420 lbs

Capacity: 1 person (up to 6'8") or 2 people

Power

Input: 120V / 60Hz (standard household outlet)

Max Power: 1600W

Current: 15 amps

Outlet Required: Standard 15A household outlet

Performance

Max Temperature: 220°F

Therapy: Infrared + red light

Connectivity: WiFi adapter included

Lead Time: Approximately 3–4 months

Reaches 220°F on a standard 120V / 15A household outlet — no electrician or 220V upgrade required
Infrared + red light therapy — full-spectrum heat delivery
Heater 4.0 with internal Faraday cage — maximizes heat and infrared delivery
30% faster preheat time vs. previous generation
Upgraded roof panel with stainless steel heat reflectors and wool insulation
Aluminum V-track and trolley for smooth, reliable lid opening
High-temp lid gasket for consistent heat retention
10-foot American-made 12-gauge power cord — no extension cord needed
Flat-packable: assembles and disassembles in 10–15 minutes
Custom rail system for easy reassembly in new locations
Stainless steel logos — fade-resistant finish
WiFi adapter included
90+ five-star Google reviews
Hand-built in small batches in Reno, NV

The Hot Box Sauna (assembled)
Heater assembly (Heater 4.0 with Faraday cage)
Infrared red light bulbs
WiFi adapter
10-foot 12-gauge American-made power cord

All components of the sauna are protected for a period of 12 months, with the exception of light bulbs. In the event of a damaged light bulb upon delivery, customers are advised to promptly contact our customer support for assistance.

Free Curbside Delivery

Curbside Delivery ships via Freight to the 48 contiguous states. The freight carrier will contact you 24 to 48 hours prior to delivery to set a delivery day and time Monday-Friday, with a 4-hour open window.

They won’t deliver without speaking to you first. **Shipping times are only approximate, and can change depending on environmental conditions, transit issues, and carrier’s availability. Last minute appointments can occur, and it’s out of our hands since the delivery process is managed by the carrier’s. The sauna will be delivered in 1 box or more, depending on the model. All boxes will be strapped to a pallet. All saunas are delivered in a 53-foot semi-truck with a single driver, who will unload the pallet to your curbside or driveway only. Any delivery questions or issues (remote areas, long driveways, large and low hanging trees, apartment complex, stairs, etc.) should be addressed with us prior to shipping your sauna.

Once the driver has unloaded the sauna, we ask that you immediately inspect the boxes for any damage. Please indicate any minor scratches, indentations, or scuff marks to the outside of the boxes on the delivery receipt. You do not need to open the boxes to inspect the sauna. The freight company will deliver your sauna to a carport or first-floor entryway. Please check the box dimensions and ensure it will fit through your doorway. Assembly on these saunas are surprisingly easy and can take between 30-45 minutes, depending on the sauna. Assembly instructions are included with the saunas.