Celsium sauna installation planning
Planning one of the five Celsium outdoor saunas we carry means preparing the site before the kit arrives. Each ships flat-packed for assembly on your own foundation, and the heater is sold separately, so the foundation and the heater circuit are arranged locally. This guide takes the installation step by step, from the foundation and permits to the heater circuit, delivery and assembly, with each model's figures as its product page gives them. Sauna Republic is an authorized Celsium dealer.
What arrives, and what you arrange
Each of the five arrives as a flat-pack kit with the ThermoWood® exterior in your chosen color, a bronze-tinted glass front, a full-height tempered glass door, an indoor LED strip that is installed on site, and Celsium's step-by-step installation guidelines. If you are still choosing a model, our Celsium sauna buying guide compares the five.
The three Jonas models are delivered securely on pallets and the two Ula models on a pallet:
| Model | Flat-pack pallet size (Celsium's product sheet) | Weight (Celsium's US listing) |
|---|---|---|
| Celsium Jonas Grand 6-Person Outdoor Sauna | About 86.6" × 102.4" × 51.2" (2.2 × 2.6 × 1.3 m) | Approx. 1,984 lbs (about 900 kg) |
| Celsium Jonas Classic 4-Person Outdoor Sauna | About 86.6" × 98.4" × 47.2" (2.2 × 2.5 × 1.2 m) | Approx. 1,543 lbs (about 700 kg) |
| Celsium Jonas Mini 2-Person Outdoor Sauna | About 70.9" × 98.4" × 47.2" (1.8 × 2.5 × 1.2 m) | Approx. 1,213 lbs (550 kg) |
| Celsium Ula Mini 2-Person Outdoor Sauna | About 43.3" × 94.5" × 47.2" (1.10 × 2.40 × 1.20 m) | Approx. 1,213 lbs (550 kg) |
| Celsium Ula Micro Compact 2-Person Outdoor Sauna | About 43.3" × 94.5" × 47.2" (1.10 × 2.40 × 1.20 m) | Approx. 1,213 lbs (550 kg) |
We confirm the shipping weight and pallet details with your quote.
Each product page also lists what the sauna needs for operation, sold separately: an electric sauna heater sized to the cabin, a heater control (if not built into the heater) and sauna stones sized to the heater, a dedicated electrical circuit installed by a licensed electrician, and a solid, level foundation. We recommend an electric heater, control and stones with your quote, and our specialists pair them with your cabin and your electrical service.
The foundation
Each of the five needs a solid, level foundation of at least the size its product page gives, ready before delivery so the kit can be assembled straight onto it.
| Model | Minimum foundation (Celsium) | Exterior (W × L × H) | Bronze-tinted glass |
|---|---|---|---|
| Jonas Grand | 86.6" × 110.2" (2.2 × 2.8 m) | 85.0" × 109.6" × 98.0" | Most of the 85" end wall |
| Jonas Classic | 86.6" × 86.6" (2.2 × 2.2 m) | 85.0" × 85.0" × 98.0" | Most of one 85" wall |
| Jonas Mini | 63.0" × 86.6" (1.6 × 2.2 m) | 85.0" × 60.4" × 98.0" | Most of the 85" wide face |
| Ula Mini | 47.2" × 78.7" (1.2 × 2.0 m), per Celsium's product sheet | 49" × 81" × 83" | The full front, along the 81" side |
| Ula Micro Compact | 39.4" × 39.4" (1.0 × 1.0 m), per Celsium's product sheet | 49.2" × 53.1" × 90.6" | The full front, on the 53.1" side |
The two Ula models rest on base runners within their foundation area, so the Ula Mini's body can overhang its base slightly, and on a minimum-size base the Ula Micro Compact's body extends past the edges. On the three Jonas models, each minimum foundation measures slightly more than the cabin in both directions.
How to build the foundation depends on your site, so ask a local contractor; our installation directory lists contractors near you. If the sauna will stand on a deck, patio, rooftop or other raised surface, that surface must carry the sauna's weight plus its bathers, and a qualified professional should check it before installation.
Decide which way the glass will face before you set the foundation. On the three Jonas models, facing the glass, the full-height glass door is in the side wall on your left, at the end nearest the glass; the Jonas Grand's opens outward. On the two Ula models, the door is at the center of the glass front.
Permits and local requirements
Requirements for outdoor structures and electrical work vary by location, so check with your local building department before installation. Your electrician can advise on permits for the heater circuit.
For a commercial site, suitability depends on the site and local code. The cabin isn't sold as a UL-, ETL- or CSA-listed electrical appliance: the heater and electrical equipment are installed separately, so check your local code requirements before ordering. For commercial or multi-unit projects, we provide project support and confirm suitability and Celsium's warranty terms for commercial use with your quote; see our commercial page.
The heater circuit
None of the five includes a heater: it is sold separately so it can be matched to your site and electrical service. Because the circuit is sized to the heater, settle the heater first. Each product page gives Celsium's figure:
| Model | Heater output (sold separately) | Source |
|---|---|---|
| Jonas Grand | At least 11 kW | Celsium's US listing |
| Jonas Classic | At least 9 kW | Celsium's US listing |
| Jonas Mini | 4.5 to 6 kW, recommended | Celsium's product sheet |
| Ula Mini | 6 kW, recommended | Celsium's product sheet |
| Ula Micro Compact | 3.5 to 4.5 kW, recommended | Celsium's product sheet |
General sizing rules, such as those in our heater sizing guide, can give a different figure from Celsium's; for these cabins, the Celsium figures on each product page apply.
The heater is hardwired on a dedicated circuit, and a licensed electrician should size the breaker and wire to the heater's nameplate rating; our installer and electrician directory lists electricians near you. When you request pricing, we put a heater, control and stones on the quote, sized to the cabin and to your electrical service, or check a heater you already have against the cabin before anything ships.
The control panel in this photo is sold separately, as are the heaters, controls and stones in Celsium's photos and renderings, and none is a recommended pairing for its cabin. We carry electric heaters in our Electric Sauna Heaters collection and pair one with your quote; for running costs, see how much electricity a sauna heater uses.
Preparing a site for a Celsium sauna?
Tell us the model, where it will stand and your electrical service, and we confirm your site, power supply and configuration, then send a delivered price with the heater pairing and financing options.
Get PricingDelivery day
Shipping is complimentary to the continental US and included in your quote; deliveries to Alaska, Hawaii and Puerto Rico are quoted separately. Delivery is curbside, and liftgate service can be added so the carrier lowers the pallet to the ground.
Our Shipping Policy describes freight delivery in more detail.
Assembly and installation
Celsium doesn't publish an assembly time. The kit arrives with Celsium's step-by-step installation guidelines, and each product page lists it as a flat-pack DIY kit: you can assemble it yourself or hire a local contractor, and a licensed electrician connects the heater. We supply the sauna and coordinate its delivery; installation is arranged locally, and our installation directory lists contractors and electricians near you.
Who does what:
You can fit the included LED strip or a locally sourced LED strip rated for sauna temperatures, and we confirm how the included strip is powered with your quote. Every Celsium sauna is crafted from natural wood, so the final color and grain may vary slightly from the images.
A planning checklist
The steps in order:
For the space around the sauna, including seating and changing space, see our backyard sauna setup guide; our sauna size guide covers how much space a sauna needs.
Frequently asked questions
What foundation does a Celsium sauna need?
A solid, level base, ready before delivery so the kit can be assembled straight onto it. Celsium specifies at least 86.6" × 110.2" for the Jonas Grand, 86.6" × 86.6" for the Jonas Classic and 63.0" × 86.6" for the Jonas Mini; Celsium's product sheets give 47.2" × 78.7" for the Ula Mini and 39.4" × 39.4" for the Ula Micro Compact. The two Ula cabins rest on base runners within those areas, so the Ula Mini's body can overhang its base slightly, and on a minimum-size base the Ula Micro Compact's body extends past the edges.
Can a Celsium sauna stand on a deck or patio?
Each of the five Celsium saunas we carry needs a solid, level foundation of at least the size its product page gives. A deck, patio, rooftop or other raised surface must carry the sauna's weight plus its bathers, and a qualified professional should check it before installation.
Do I need a permit for a Celsium sauna?
Requirements for outdoor structures and electrical work vary by location, so check with your local building department before installation. Your electrician can advise on permits for the heater circuit.
What electrical service does a Celsium sauna need?
On the five Celsium saunas we carry, the heater is sold separately, and the electrical service depends on the heater you choose. The heater is hardwired on a dedicated circuit, and a licensed electrician should size the breaker and wire to the heater's nameplate rating. Our installer and electrician directory lists electricians near you.
How is a Celsium sauna delivered?
The five Celsium saunas we carry ship flat-packed: the three Jonas models on pallets and the two Ula models on a pallet. Delivery is curbside, and liftgate service can be added so the carrier lowers the pallet to the ground. Moving the components from the curb to your site is up to you, so plan for helpers or equipment.
How long does assembly take?
Celsium doesn't publish an assembly time. The kit arrives with step-by-step installation guidelines, and you can hire a local contractor for assembly and a licensed electrician for the heater connection. Our installation directory lists contractors and electricians near you.
Get pricing on a Celsium sauna
We confirm your site, power supply and configuration, then send a delivered price with the heater pairing and financing options.
Request pricingBrowse all five in Celsium Saunas, or compare other brands in Outdoor Saunas and Traditional Saunas.
Celsium and ThermoWood® are trademarks of their respective owners. Sauna Republic is an authorized Celsium dealer. This article is for educational purposes and is not medical advice. If you are pregnant, managing a heart, blood-pressure or circulation condition, or taking medication, consult a healthcare professional before using a sauna.
