Sunlighten Amplify IV 4-Person
Price at Sunlighten, last checked 2 Nov 2026. Price may vary. In stock at the seller when checked.
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Our take
The Sunlighten Amplify IV 4-Person is a 4-person infrared cabinet for indoor use, sold by Sunlighten for $8,999 when we last checked on 2 Nov 2026. Among 82 infrared indoor saunas we list, its spec score ranks 41 of 82, and its price compares with a $3,399 median for the group.
Needs a dedicated 30A or 240V circuit. Budget for an electrician and, where required, a permit. Its published size leaves about 7.8 sq ft of footprint per seat.
Strengths
- Warranty: Sunlighten 7-year residential warranty on the cabinetry and heaters; 3 years on controls; 1 year on glass doors and audio. Parts only: labor and freight aren't covered, and it's void if not plugged straight into a dedicated wall outlet
- Strong heat for its type: up to 170 °F
- Full-spectrum infrared panels
- Roomy: about 7.8 sq ft of footprint per seat
Trade-offs
- Priced high for its specs: $8,999 against a $3,399 median for infrared indoor saunas
- Needs a dedicated 240V or 30A circuit, installed by a licensed electrician
Good fit for
- Households of up to 4 at a time
- Buyers who specifically want full‑spectrum infrared
Consider another option if you're
- Homes with no room in the panel for a new 240V circuit
- Anyone who wants hot stones and steam: this is infrared, with gentler air heat
- Anyone planning to install it outside: it isn't rated for outdoor use
- Tight budgets: similar saunas have a median price of $3,399
Specifications
| Brand | Sunlighten |
|---|---|
| Model | Amplify IV 4-Person |
| Type | Infrared · indoor cabinet |
| Price | $8,999 last checked 2 Nov 2026 Eucalyptus (the only finish offered); integrated red light extra; free freight shipping to the contiguous US (curbside on a pallet); 2–3 hours to assemble |
| Seller | Sunlighten (affiliate link) |
| Seller's list price | $10,399, as shown by the seller |
| Availability | In stock at the seller when checked |
| Shipping | Not published |
| Seats | 4, per the maker |
| Exterior W × D × H | 80 × 56 × 78 in source Height includes 2 in feet; panels fit a 30 in doorway |
| Footprint | 31.4 sq ft |
| Interior size | Not published on the listing |
| Heating | Full-spectrum infrared panels |
| Maximum temperature | 170 °F |
| Electrical | 240V, 20A · 3,900 W source |
| Connection | NEMA 6-20P plug; needs a dedicated 240V 20A circuit with a NEMA 6-20R outlet |
| What that means | Needs a dedicated 30A or 240V circuit |
| Wood | Eucalyptus |
| Warranty | Sunlighten 7-year residential warranty on the cabinetry and heaters; 3 years on controls; 1 year on glass doors and audio. Parts only: labor and freight aren't covered, and it's void if not plugged straight into a dedicated wall outlet source |
| Indoor or outdoor | Indoor |
| Listed features | Bluetooth, Color lighting |
Interior size, heater model (for infrared) and the largest delivered piece aren't on the seller's listing. Check with the seller before you buy.
Rating breakdown
How its Good spec rating breaks down by category, each compared with similar saunas. Full method.
| Construction & durability | Not published, left out |
|---|---|
| Value | Basic |
| Heating | Excellent |
| Warranty & support | Strong |
| Installation | Basic |
| Features | Not scored |
| Appearance | Not rated yet |
| Space & capacity | Strong |
Dimensions and installation
- Power. Needs a dedicated 30A or 240V circuit (240V, 20A · 3,900 W). Have a licensed electrician confirm your panel and wiring before you order.
- Floor space. The maker doesn't publish clearances here, so Make Sure It Fits assumes 3 in at the sides and back: plan on about 86 × 59 in of floor.
- Ceiling. At 78 in tall plus our 6 in allowance above, you'd want a ceiling of at least 84 in. Confirm with the manual.
- Doorways. The listing doesn't give the largest delivered piece, so measure your narrowest door or gate and ask the seller.
Running cost estimate
At its rated 3,900 W, four 45-minute sessions a week (warm-up included) at the U.S. average of 18.3¢ per kWh (EIA) come to about $9 a month, or $112 a year. This is an estimate, not a quote: heaters cycle off once hot, so most owners pay less. Use your own rate in the True Cost calculator.
Warranty and support
Sunlighten 7-year residential warranty on the cabinetry and heaters; 3 years on controls; 1 year on glass doors and audio. Parts only: labor and freight aren't covered, and it's void if not plugged straight into a dedicated wall outlet. source Orders, delivery and warranty claims go through Sunlighten, the seller, and Sunlighten, the maker. Read the written warranty before you buy, because outdoor use and self-installation can change the terms. Our warranty guide lists the questions to ask.
Check current price & availability
Price at Sunlighten · last checked 2 Nov 2026 · price may vary
- Shipping and delivery details on the seller's page ↗
- Compare similar saunas
- See if it fits my space
- Estimate the five-year cost
Affiliate link: Cedar Scout may earn a commission if you buy through it. Commissions never change our scores or rankings.
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Related guides
Sources
Price, size, power and warranty come from the seller's listing here, last checked 2 Nov 2026. Prices change often; the seller's page is the final word. Recall status: not part of the 17 Sept 2026 CPSC sauna recall, the recall we checked. We haven't tested this sauna in person. Electrical details are preliminary and don't replace a licensed electrician.
Independent by design. We order saunas with our published method. Cedar Scout may earn a commission when you buy through affiliate links on this page. Commissions never change which saunas appear, their scores or their order. How we earn money.