Custom vs Prefab Infrared Sauna
Fit, performance, cost and when each wins
Choose custom if your space is awkward, you want full-body heater coverage with documented low EMF, or you want real red-light therapy at 2–6 in. Choose prefab if you need the lowest price and fastest delivery and a standard 2-person box fits. Custom (e.g. SaunaCloud Atlas/Sierra, Sunlighten custom, Clearlight kits) is drawn to your room with 3D + electrical plans; prefab forces the room to fit the box.[1][2]
| Custom | Prefab | |
|---|---|---|
| Fit | Any alcove/closet/basement 4×4 ft+, 3D first | Fixed sizes; shims/fillers |
| Heater coverage | 360° engineered to seated geometry | Generic back/side only |
| EMF | System-engineered, seated readings (~0.20 mG SaunaCloud) | Varies 3–100 mG |
| Red light | Bench-embedded 660/850nm in range | Wall strips (ambient) except Eclipse dual-panel |
| Lead time / cost | 7–12 wks; $8k–$20k+ installed | Days–weeks; $1.8k–$10k |
| Best for | Daily users, design-conscious, commercial | First cabin, secondary sauna, tight budget |
Rule of thumb: if you will use it 3–7×/week for years, custom’s placement + cedar + warranty pays back. If testing whether you like infrared, start prefab (Dynamic/JNH) then upgrade.
References
- SaunaCloud custom page. Retrieved 8 Sep 2026. https://saunacloud.com/custom-infrared-sauna/
- Clearlight custom guide. Retrieved 8 Sep 2026. https://infraredsauna.com/blog/build-custom-infrared-sauna/