Image: MonolightMonolight One
- 1-person infrared
- 6 carbon panels + red light
- Up to 149°F
- 110V plug-in, 13A
All 3 picks at a glance
| # | Image | Pick | Score | Price | Link |
|---|---|---|---|---|---|
| 1 | Image: Monolight | Best for one personMonolight One | 7.3Spec Score | $1,899 | Check price (paid link) |
| 2 |  Image: Monolight | Best for two on a 15A outletMonolight Duo | 7.3Spec Score | $2,399 | Check price (paid link) |
| 3 |  Image: Monolight | Best if you want full-spectrum + more roomMonolight Pro | 7.3Spec Score | $2,999 | Check price (paid link) |
On this page
Verdict: Monolight is the set-price, plug-in infrared cabin option on this site. Buy the One (paid link) ($1,899) if it’s just you and you want the smallest footprint; the Duo (paid link) ($2,399) if two people will share it on a regular 15A outlet; and the Pro (paid link) ($2,999) only if you want the full-spectrum heater mix, a larger room, and you’ve already confirmed a dedicated 20A NEMA 5-20R circuit. Skip the line if you want stones and steam, outdoor use, a long heater warranty, or a custom fit. This review is based on Monolight’s published product pages, FAQ and shipping policy on Oct 15, 2026. We haven’t tested a Monolight sauna ourselves.
Key facts (all three models)
| Spec | Monolight (line) |
|---|---|
| Type | Indoor prefab infrared cabin (One and Duo: far-infrared carbon panels; Pro: carbon + full-spectrum). Not for outdoor use per Monolight’s FAQ |
| Wood | Canadian hemlock; panels about 5 mm thick (product pages) |
| Temp range (maker) | 104–149°F ambient (home page / product marketing) |
| EMF (maker’s figure) | “Around 25” on each product page — unit and measurement method not published |
| Controls / extras | Bluetooth, FM, USB; reading lights; speakers; control panel; red light feature; cup holder; towel rack; magazine rack |
| Warranty | 2-year limited (structure, electrical, controls); original purchaser only, non-transferable (FAQ) |
| Returns | 30 days from delivery with RMA; must be unused, new condition, original packaging (FAQ). Site banners also say “30-day risk-free trial” |
| Shipping | Free freight within the contiguous U.S.; curbside; 3–7 business days from Los Angeles warehouse typical (FAQ / shipping policy). Not to AK, HI, territories, Canada or P.O. boxes |
| Assembly (maker) | About 30–40 minutes with two people; screwdriver + video guide; no pro install required (FAQ) |
From monolightsauna.com product pages, FAQ and shipping policy, checked Oct 15, 2026. Monolight pays us a commission if you buy through our links. Prices and specs change, so confirm before you order.
One vs Duo vs Pro
| One | Duo | Pro | |
|---|---|---|---|
| Price* | $1,899 (was $2,299) | $2,399 (was $2,999) | $2,999 (was $3,699) |
| Seats (maker) | 1 | 2 | 2 |
| Outside (W×D×H) | 41.3" × 35.4" × 74.8" (1050 × 900 × 1900 mm) | 47.2" × 41.3" × 74.8" (1200 × 1050 × 1900 mm) | 51.2" × 47.2" × 78.7" (1300 × 1200 × 2000 mm) |
| Inside (W×D×H) | 38.6" × 31.7" × 70.9" (980 × 804 × 1802 mm) | 43.4" × 37.6" × 70.1" (1102 × 954 × 1780 mm) | 48.3" × 43.6" × 75.0" (1228 × 1108 × 1904 mm) |
| Heaters | 6 carbon (MonoPulse™): 2×300W back, 250W L, 250W R, 180W bench, 180W floor = 1,410W | 6 carbon (MonoPulse™): 2×300W back, L + R sides (watts not published), 180W bench, 180W floor = 1,560W total | Carbon + full-spectrum (MonoGrid™): 2×300W back carbon, 180W L carbon + 300W L full-spectrum, 180W R carbon + 300W R full-spectrum, 300W bench, 180W floor = 2,040W |
| Glass door | 1530 × 590 mm, 6 mm tempered | 1540 × 590 mm, 6 mm tempered | 1810 × 590 mm, 8 mm tempered |
| Circuit (product / FAQ) | 110V, 13A American plug; FAQ: 120V/15A outlet, dedicated circuit recommended | 110V, 14A American plug; FAQ: 120V/15A outlet, dedicated circuit recommended | 110V, 19A American plug; FAQ: dedicated 20A circuit + NEMA 5-20R (T-slot) required — not a standard 15A plug |
| Freight boxes | 2 | 2 | 3 |
*Sale prices and compare-at from monolightsauna.com Shopify product data on Oct 15, 2026. Inch sizes converted from Monolight’s millimeters (÷ 25.4, one decimal). Duo side-heater wattages are not listed on the product page; only the 1,560W total is.
Image: MonolightWhat stands out: the smallest cabin (41.3" × 35.4" outside), the lowest draw (1,410W / 13A), and the lowest price. Six carbon panels cover back, sides, bench and floor. Tradeoffs: one seat; 2-year warranty; fixed size; EMF figure lacks units and method.
Image: MonolightWhat stands out: two seats at 47.2" × 41.3" outside without jumping to the Pro’s 20A plug. Same MonoPulse™ carbon layout class as the One, totaling 1,560W / 14A. Tradeoffs: still a short warranty; side-panel watts aren’t itemized on the listing; still indoor-only.
Image: MonolightWhat stands out: largest cabin (51.2" × 47.2" × 78.7"), thicker 8 mm glass door, and MonoGrid™ dual-wave heaters that mix carbon and full-spectrum tubes (2,040W). Tradeoffs: FAQ requires a dedicated 20A circuit and a NEMA 5-20R outlet — it will not run on a standard 15A receptacle. Confirm that outlet before you buy.
Plug and circuit
- One and Duo: product pages list 110V American plugs at 13A and 14A. Monolight’s FAQ calls for a standard 120V, 15A grounded outlet and strongly recommends a dedicated circuit (no shared high-draw appliances; extension cords discouraged).
- Pro: 19A / 2,040W. FAQ: mandatory dedicated 20A circuit and NEMA 5-20R (T-slot). Not compatible with a standard 15A plug.
- Clearance (FAQ): 6" above, 4" behind, 2" on each side.
- Indoor only: FAQ says residential indoor spaces; not bathrooms, poolsides or other high-humidity spots, and not outdoors.
Who should buy which
- One: solo use, tight closet or corner, want a set price under $2,000 and a regular outlet.
- Duo: two regular users, still want a 15A-class plug, don’t need full-spectrum heaters.
- Pro: two users who want the larger cabin and full-spectrum mix, and who already have (or will install) a 20A T-slot outlet.
Who should skip Monolight
- Want stones, steam and 180°F+ air: that’s traditional heat. See the Almost Heaven Logan (paid link) ($3,885 at Select Saunas) or our indoor sauna kits.
- Odd-shaped space or want full-wall custom panels: SaunaCloud (paid link) designs to your room (quote-based; kits $5,000–$15,000+ per its FAQ). Read our SaunaCloud review.
- Need it outdoors: Monolight’s FAQ says indoor only. See outdoor infrared saunas.
- Want a long heater warranty: Monolight’s residential warranty is 2 years; SaunaCloud lists 7 years on heaters.
- Budget under $3,000 for infrared specifically: start with our best infrared saunas under $3,000.
FAQ
How much does a Monolight sauna cost?
On Oct 15, 2026: One $1,899 (was $2,299), Duo $2,399 (was $2,999), Pro $2,999 (was $3,699). Contiguous-U.S. freight is listed as free; confirm at checkout.
Does a Monolight need 240V?
No. All three use a 110V American plug per the product pages. One and Duo are FAQ-rated for a 120V/15A outlet; the Pro needs a dedicated 20A NEMA 5-20R circuit.
One vs Duo vs Pro — which should I buy?
One for a single user and the smallest footprint; Duo for two people on a 15A-class outlet; Pro for the larger cabin and full-spectrum heaters if you have the 20A T-slot outlet.
What warranty and return policy does Monolight offer?
2-year limited warranty on structure, electrical and controls for the original purchaser. Returns within 30 days of delivery need an RMA and unused/new/original packaging per the FAQ; banners also advertise a 30-day risk-free trial — read the return terms before you open the boxes.
Did you test these saunas?
No. This page is built from Monolight’s published specs and policies. See how we score.
- Sources (accessed Oct 15, 2026):
- Monolight One product page / Shopify .js (price, compare-at, dims mm, heater watts, 1410W / 110V 13A, door, accessories): https://monolightsauna.com/products/monolight-one-1-person-infrared-sauna
- Monolight Duo product page / Shopify .js (price, compare-at, dims, 1560W / 110V 14A): https://monolightsauna.com/products/monolight-duo-2-person-infrared-sauna
- Monolight Pro product page / Shopify .js (price, compare-at, dims, full-spectrum layout, 2040W / 110V 19A, 8 mm door): https://monolightsauna.com/products/monolight-pro-2-person-full-spectrum-infrared-sauna
- Monolight FAQ (warranty, returns/RMA, assembly, indoor-only, electrical including Pro NEMA 5-20R, clearance): https://monolightsauna.com/pages/faq
- Monolight Shipping Policy (contiguous U.S. only, curbside freight, box counts, 3–7 day typical): https://monolightsauna.com/pages/shipping-policy
- Monolight home (104–149°F ambient claim, 2-year warranty + trial banner language): https://monolightsauna.com/