SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Installed infrared cabin
2-person installed infrared cabin, black Obsidian exterior with eucalyptus interior, no red-light option
$5,999US price, checkedTwo-person cabin with eight heaters on a dedicated 120 V circuit
Check price at Sunlighten for Sunlighten Amplify II Full review →Installed infrared cabin
3-person Full-Spectrum Infrared Sauna
$8,999US price, checkedThree-person infrared cabin that needs a 240 V circuit and publishes few details
Check price at HigherDOSE for HigherDOSE Full Spectrum Infrared Sauna Full review →| Criterion | Sunlighten Amplify II | HigherDOSE Full Spectrum Infrared Sauna |
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| US price | $5,999Checked Oct 13, 2026 · Price details in the review | $8,999Checked Oct 15, 2026 · Price details in the review |
| Three-year ownership estimate | $5,999 Incomplete known subtotal. Not included: installation, energy use. | $8,999 Incomplete known subtotal. Not included: installation, energy use. |
| Choose if | Two people with a dedicated 120 V, 20 A circuit, about 51 × 46 in of indoor floor and a paved path for freight. | Two or three people who share sessions and can run a dedicated 240 V, 15 A circuit to the spot. |
| Main trade-off | Opened saunas can't be returned, warranty labor is on you, and the panel magnets can affect pacemakers. | You can't return it once it's opened, and the warranty terms, heater details and safety listing aren't published. |
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| Exact variant | 2-person installed infrared cabin, black Obsidian exterior with eucalyptus interior, no red-light option | 3-person Full-Spectrum Infrared Sauna |
| Dimensions | Outside: 50.9 W × 45.9 D × 77.7 H in, including 2 in feet. Inside: 45.4 W × 39.9 D × 70.3 H in. The door opening is 28 in. The bench is 45.2 in wide and 20.3 in deep, 19.5 in off the floor. It weighs 541 lb. Sunlighten says it fits under a standard 8 ft ceiling and its panels fit through a standard 30 in doorway. The product page gives no clearance to leave around the cabin. | HigherDOSE now lists the 3-person exterior as 61 W × 41 D × 76.5 H in. Its interior is listed as 57 in (the dimension is unlabeled), 36.25 in deep and 70 in high, at about 580 lb. The maker's current exterior dimensions differ from the 71 W × 48 D × 77 H in reported by Garage Gym Reviews, which may describe another version. Confirm the exact unit and installation clearances before measuring your room. |
| Installation | It needs a dedicated 120 V, 20 A circuit with a NEMA 5-20R outlet. Sunlighten rates it at 1,880 W and 15.67 A. The product page tells you to book an electrician so the outlet is ready, but doesn't mention GFCI protection. Under Sunlighten's warranty, a power strip, extension cord, converter or non-dedicated circuit voids coverage. So does placing it within 5 ft of a shower, bathtub or cold plunge. Sunlighten says its saunas aren't designed to be placed outdoors. If you put one outside anyway, its separately sold cover and plastic sheet must stay on, even during sessions, or the warranty is void. Freight needs a flat, paved surface up to your garage door. The carrier leaves the sauna on a pallet in the garage or on the driveway and can't take it up steps. A local agent calls to schedule delivery. It ships in two to three boxes of 130 lb each, and Sunlighten says to have at least two people to unpack. The Magne-Seal panels lock together without screws or nails. Sunlighten says two people take about 2 to 3 hours. Its support page links an owner's manual, spec sheet, assembly guide and power box guide, but those PDFs couldn't be opened for this review. | It needs a dedicated 240 V, 15 A circuit. HigherDOSE rates it at 2,930 W with a NEMA 6-15P plug, so you'll need a matching NEMA 6-15 outlet. An upgraded cord is available on request. It ships separately, and you fit it yourself. The carrier leaves the sauna on a pallet, as far as it can get along the road or driveway. Delivery to a room of your choice costs extra, by quote from HigherDOSE's sauna sales team. Installation isn't included. No assembly time or manual is published, though the page embeds a "How to build" video. Garage Gym Reviews says its installers took about 7 hours. |
| Materials | The outside has a limited-edition black finish that Sunlighten calls Obsidian. The inside is natural eucalyptus, which Sunlighten says is sustainably sourced. Plain eucalyptus costs the same, and basswood is $200 less. It comes with a CELLIANT heater cover. | HigherDOSE describes the exterior as black mahogany and the interior as basswood. These are manufacturer descriptions, not independently verified species or emissions results. The finish and cabin-specific VOC testing remain unknown; the resource page's fabric test concerns the sauna blanket, not this cabin. |
| Warranty | The product page shows a 7-year warranty badge. Sunlighten's warranty page groups Amplify with its other cabin saunas. For home use, the cabinet and heaters get 7 years. The cabinet includes the benches, floor grates and heater cover frames. The controls (in-sauna tablet, control pad and power box) get 3 years. The glass door and audio get 1 year, and chromotherapy lighting has its own 1-year term. Commercial use gets 5 years on the cabinet and heaters and 1 year on everything else. The warranty's disclaimers say labor and technician costs aren't covered. You pay all freight, including on parts shipped for service. Coverage is for the original buyer only and ends if you sell the sauna. It's void on a power strip, extension cord, converter or non-dedicated circuit, or within 5 ft of a shower, bathtub or cold plunge. Sunlighten says its saunas aren't designed for outdoor use. Outside, the separately sold cover and its plastic sheet must stay on at all times. The sauna must be bought and put into use within a year of its manufacture date. | The product page promises a limited 5-year residential warranty and a 1-year commercial warranty. HigherDOSE's warranty page has no sauna section, only one-year terms for nine other products. It doesn't publish what the 5 years covers, so heaters, controls, labor, parts shipping and transfer are all unclear. Ask for the written sauna warranty before you order. |
| Returns | You have 30 days from delivery to start a return or exchange, and the sauna must be in its original, unopened packaging. Opened saunas can't be returned or exchanged. Returns, exchanges and cancellations may carry a 3% administrative fee and a $499 restocking fee for each Amplify sauna. Storage fees for re-routing the sauna and return shipping to the warehouse may also apply. Exchanges can add shipping back to you. If it hasn't shipped, you cancel by emailing your sales representative, or through Sunlighten's order portal if you don't have one. Refunds go to the original payment method once the sauna is received, inspected and restocked, with no stated timeframe. Sunlighten reserves the right to refuse a return, exchange or cancellation. | HigherDOSE's return policy gives Full Spectrum Saunas 30 days from delivery, but only if unopened and in the original packaging. Every approved return carries a 30% restocking fee, about $2,700 at the 3-person price. You also pay all return shipping. The 120-day money-back guarantee in the site banner doesn't cover saunas. The policy was last updated May 8, 2025. |
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These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.