Auroom Mira L CLT Outdoor Sauna Kit (2025)
Modern Nordic design. Cross‑laminated timber core. Thermory exterior. Thermo‑aspen interior. Built for four‑season backyards.
- Seats up to 5 with a full glass front
- CLT wall core for even, stable heat
- Two finishes: Natural or Painted Black Thermo‑Spruce
- Ships on two pallets; typical two‑day assembly with 2–3 people
Why homeowners pick Mira L
- Stable heat, State-Of-The-Art Construction. CLT panels store and release heat smoothly. Less temperature swing. Better sessions.
- Outdoor‑ready envelope. Vented EPDM roof, rain management system, vented rainscreen construction. Thermally modified cladding resists rot and movement.
- Clean install. Prebuilt panels, integrated vents, and grooved joints mean no on-site cutting or imperfect corners.
Built for landscaping and new builds
- Goes on a slab, pavers over base, or engineered deck.
- Straightforward installation means you can work with your existing contractors.
- We coordinate delivery with your GC so it lands after hardscape and before final plantings.
Mira size comparison
| Model | Exterior (W × D × H) | Interior (W × D × H) | Volume (cu ft) | People | Recommended Electric Heater* |
|---|---|---|---|---|---|
| Mira S | 64 × 63 × 97 in | 52 × 53 × 79 in | ~126 | 2–3 | 6–7.5 kW |
| Mira L | 86 × 87 × 97 in | 76 × 77 × 79 in | ~268 | 4–5 | 9–10.5 kW |
*Sizing accounts for the full glass front and outdoor use. See guidance below.
Quick specs
| Model | Mira L (2025 CLT) |
|---|---|
| Capacity | Up to 5 people |
| Exterior Dimensions | 86 W × 87 D × 97 H in |
| Interior Dimensions | 76 W × 77 D × 79 H in |
| Interior Volume | ≈ 268 cu ft |
| Structure | Cross‑laminated timber wall core with interior + exterior air gaps and radiant layer |
| Exterior | Thermory Thermo‑Spruce cladding (Natural or Painted Black) |
| Interior | Thermo‑Aspen benches; backrest with dimmable LED |
| Front Wall | Full tempered glass; door ~24.2 in wide |
| Floor | Duckboard |
| Ventilation | Passive intake low by heater; exhaust high opposite. Contact Sauna Marketplace for mechanical ventilation and climate equalization options. |
| Roof | Vented EPDM with gutter and downspout |
| Drain | Floor drain at back center under benches |
| Assembled Weight | ~2,646 lb |
| Shipping | Two pallets; shipping weight ~2,900 lb; crate ~48 × 91 × 56 in |
| Warranty | 2 years on the cabin (heaters/controls have their own warranties) |
| Heater | Sold separately (electric, wood, or propane) |
Installation and safety
| Item | Requirement |
|---|---|
| Base | Level, non‑settling pad: slab, pavers over compacted base, or engineered deck. Recommended pad ≥ 90 × 90 in. |
| Assembly | 2–4 people. Panels first, then roof, glass, benches, trim. Plan for 3rd person for roof placement. |
| Roofing | Factory EPDM with vented space |
| Ventilation | Use built‑in intake under/behind heater and exhaust high opposite. Do not block. |
| Drain | Double floor drain next to heater and center under bench. Consider extending heater drain to daylight. |
| Electrical — Heater | Dedicated 240 V circuit sized to the heater. Two‑pole breaker. Copper conductors only. Bonding and equipment grounding required. |
| Electrical — Lights/Controls | Dedicated 120 V circuit to the equipment box under benches (or per control manufacturer). Can use 120v lighting circuit from Harvia, Saunum, or HUUM contactor boxes. |
| Heater Clearances | Follow the heater manual for minimum distances to benches, backrest, and glass. Only Harvia KIP heater works with included safety guard. |
| Outdoor Use | Maintain exterior finish per care instructions. Inspect caulks and seals annually. |
We coordinate with your GC on pad, conduit, and drain so this drops in cleanly at the right stage.
Heater sizing guidance
Mira L interior volume is ~268 cu ft. The full glass front and outdoor location increase load. Use this rule of thumb:
- Balanced choice: 9 kW for most climates.
- Cold climates or HIVE: 10.5 kW.
- Steam‑rich sessions: Choose a combi/steam model if you like consistant humidity.
Pair it right
- Cold shower or plunge a few steps from the door.
- Wi‑Fi controls allow scheduling and preheat from the house.
- Backrest lighting is standard; add exterior path lighting if desired.
Operation tips
- Preheat 45–60 minutes for optimal experience.
- Keep intake clear near the heater. Crack the exhaust during use.
- Experiment with lower temps and more water on rocks.
- After your last round, make sure exhaust is open and let the heater run for another 10 minutes to dry.
What’s included
- CLT‑panel cabin kit with Thermory exterior cladding
- EPDM roof with vent, gutter, and downspout
- Full glass front wall and premium door
- Two‑tier thermo‑aspen benches and matching heater guard
- Duckboard floor; backrest with LED
- Passive intake and exhaust vents
- Floor drain hardware
- Hardware, trims, and equipment box for controls under benches
- Heater and accessories sold separately
FAQ
How long does assembly take?
Plan on a full two days for two people if this is your first time building an Auroom sauna. A 3rd person is helpful for the roof and bench installation.
Slab or deck?
Either works. Slab or pavers are simplest. Decks must be engineered for point loads and kept level.
What about winter?
The insulated CLT build and thermo‑wood exterior are made for four seasons. Size the heater correctly and allow more preheat in deep cold.
Can I throw water on the stones?
Yes, all of our heater options for the Auroom Mira L are built to introduce steam by pouring water on the stones.
Do I need a floor drain?
It’s built in.
Do I need mechanical ventilation?
No. The built‑in intake and high exhaust work well. Contact Sauna Marketplace for retrofit options if you'd like to add a mechanical exhaust.
Snow, coastal, or HOA concerns?
We can help with details and finishes. Ask your GC about setbacks and anchoring. We’ll support with drawings and specs.
Warranty and support?
Two‑year cabin warranty. Heaters and electronics carry their own warranties. Sauna Marketplace is your first call for parts and support.
Lead time and shipping?
Typically Auroom Mira's are delivered in 10-14 days in the continental US. Ships by appointment, curbside. Two pallets. Crate about 48 × 91 × 56 in.
Create your oasis
Book a 15‑minute planning call. We’ll finalize pad details, conduit routes, drain tie‑in, and heater sizing so install day is calm and fast.
Installer handoff — copy/paste to your electrician and GC
Base: Level, non‑settling pad (slab, pavers over base, or engineered deck). Target footprint ≥ 90 × 90 in.
Weight: ~2,646 lb assembled. Shipping weight ~2,900 lb on two pallets. Plan equipment or more hands for roof and glass.
Roofing: EPDM membrane with vent, gutter, and downspout. Keep drainage path clear behind unit.
Electrical:
- Heater: dedicated 240 V circuit sized to selected heater and local code. Two‑pole breaker. Copper conductors only. Bond and ground per code. Sauna heaters prohibit GFCI; follow the heater manual.
- Lighting/controls: dedicated 120 V circuit or tap into heaters lighting circuit.
- Low‑voltage/controls routing as required by heater control.
Clearances: Per heater manual (benches, backrest, glass). Heater safety rail included with the sauna is not compatible with all heaters.
Scheduling: Deliver after hardscape is set and before final plantings/fencing.
Mira L Virtual Tour
*Additional virtual showroom available during Zoom planning sessions.
OVERVIEW
Auroom Mira L is a high-end, fully-insulated, modern outdoor sauna kit from Europe that uses premium materials throughout.
- The Auroom Mira L is popular in outdoor entertainment spaces like pool areas. It's designed for easy assembly and can fit into tight spaces, whether standing alone or recessed.
- The installation requires 2-4 people, especially for lifting and installing the ceiling elements.
- A level base is critical for installation, along with planning for electrical supply and sauna drainage location.
Create Your Oasis
Hot -> Cold -> Recover -> Repeat
Mira L along with your preferred method of cooling off between rounds will transform your space into a wellness personal retreat.
When paired with a Wi-Fi enabled heater, this sauna can be ready when you are.
Message From Auroom
At Auroom, we’re proud to bring the Nordic sauna culture to you. Transforming responsibly harvested wood into clean and modern design, Auroom isn’t just an extension of how you relax.
It’s a reflection of how you live.
Craftsmanship
For more than 20 years, Auroom has been making saunas inspired by centuries of Northern European sauna traditions. From design to development to manufacturing, our staff is dedicated to bringing you the most innovative products for the best sauna experience.
Quality
Every piece of timber we choose for our saunas is selected from the highest-quality materials. So, your sauna remains beautiful and durable no matter how often you use it.
Design
Every Auroom sauna design begins with you and your well-being. That means giving attention to every functional and aesthetic detail for a sauna experience that brings balance to your mind and body.
Sustainability
Auroom saunas use the highest-quality timber, responsibly sourced from sustainably managed forests in Northern Europe. And thermally modified wood is enhanced without chemicals, using only heat and steam for unequaled durability and stability.
We do everything to ensure Auroom saunas are safe for you and the health of our planet.
The materials used inside and out of the Auroom Mira L showcase this commitment, with two exterior options to match your vibe:
Customize Your Mira
Contact your Sauna Marketplace representative for complete customization options. If you can dream it, Auroom can make it happen and Sauna Marketplace can deliver.
So Good You'll Want Your House To Match
The Thermally modified nordic spruce cladding is so good, you just might want to side your entire home with it! The cladding used on Auroom Saunas is made by the global leader in Thermally Modified Wood - Thermory. And we can source it for you!
Prebuilt
Sauna Brushes
Vents
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