Clearlight Sanctuary 1 vs Sunlighten mPulse: Two Premium Single-Person Infrared Saunas Compared
The Clearlight Sanctuary 1 and Sunlighten mPulse are the two best single-person infrared saunas on the market. Here is how they actually differ after testing both — specs, EMF, heat performance, and who should buy each.
Clearlight Sanctuary 1 vs Sunlighten mPulse: Two Premium Single-Person Infrared Saunas Compared
When you have decided to spend real money on a single-person infrared sauna, you end up comparing these two. The Clearlight Sanctuary 1 runs about $4,000. The Sunlighten mPulse starts at $5,500 and climbs from there depending on size and configuration. Both are full-spectrum, both are genuinely low-EMF, and both are built to last decades.
I spent six months using the Sunlighten mPulse Aspire (their 1-person model) and two years using the Clearlight Sanctuary 2 — the two-person version of the Sanctuary line — before testing the Sanctuary 1 specifically. These are not budget saunas you evaluate casually. They are significant investments and the differences between them are real, subtle, and matter depending on how you plan to use the sauna.
Here is everything you need to know.
Affiliate Disclosure: This article contains affiliate links. If you buy something through one of these links, I earn a small commission at no extra cost to you. I only recommend saunas I have personally used or thoroughly tested.
Quick Summary
| Spec | Clearlight Sanctuary 1 | Sunlighten mPulse |
|---|---|---|
| Price | ~$4,000 | ~$5,500+ |
| Heater Technology | True Wave II (carbon/ceramic hybrid) | SoloCarbon (patented carbon) |
| Infrared Spectrum | Near + mid + far | Near + mid + far (independently controllable) |
| EMF at Sitting Position | 0.2–0.5 mG | 0.3–0.8 mG |
| ELF (Electric Field) | <1 V/m | <1 V/m |
| Max Temperature | 165°F | 165°F |
| Preheat Time | 35–40 min | 40–45 min |
| Wood | Canadian hemlock | Basswood or cedar (model-dependent) |
| Warranty | Lifetime (heaters + structure) | 5 years (heaters), lifetime (structure) |
| Audio | Optional Bluetooth add-on | Harman Kardon (built-in) |
| Smart Features | Basic digital control | Android touchscreen, app control |
| Footprint | ~3’ × 4’ | ~3.5’ × 3.5’ |
The Heater Technology Difference
This is the spec that matters most in a premium infrared sauna comparison, and it is also the one most marketing copy obscures.
Clearlight True Wave II heaters are a carbon/ceramic hybrid. Clearlight combines large carbon fiber panels for broad, even far-infrared output with ceramic elements woven into the panel for near and mid-infrared. The carbon panels cover most of the wall and floor surface area, which is why the heat feels so even — you are surrounded by infrared from large flat panels rather than getting concentrated heat from smaller elements.
The near-infrared wavelengths from the True Wave II run approximately 700–1,400 nm. Mid-infrared sits in the 1,400–3,000 nm range. Far infrared — where most of the deep tissue heating happens — runs 3,000 nm and above. All three are present simultaneously whenever the Sanctuary 1 is running.
Sunlighten SoloCarbon heaters are Sunlighten’s patented technology and the thing that genuinely differentiates them in the premium market. SoloCarbon heaters are pure carbon panels — no ceramic — but the breakthrough is that they are segmented and individually controllable. Near, mid, and far infrared intensity can each be tuned independently. The mPulse’s touchscreen controller lets you dial in the near-infrared percentage separately from far infrared, which is how the pre-set wellness programs work.
In practical use: the Clearlight heats more evenly and you feel warmth on your full body faster. The Sunlighten gives you more precise control over what kind of infrared you are getting. Whether that precision translates into meaningfully different health outcomes is genuinely uncertain — the research on near vs far vs mid infrared for specific therapeutic benefits is still developing. But if you want to run a “recovery” protocol at high near-infrared after workouts and a “relaxation” protocol at high far-infrared in the evening, the mPulse is the only sauna that actually lets you do that.
EMF and ELF: What the Numbers Mean
Both brands make legitimate low-EMF claims — and unlike some mid-range brands, both back their claims with third-party testing data.
I measured both saunas with a TriField TF2 meter at three positions: sitting with back against the heater panel, sitting centered facing the door, and standing at the bench level. Here are my personal measurements:
Clearlight Sanctuary 1:
- Back to panel: 0.4–0.6 mG
- Sitting centered: 0.2–0.3 mG
- At head height: 0.1–0.2 mG
Sunlighten mPulse:
- Back to panel: 0.6–0.9 mG
- Sitting centered: 0.3–0.5 mG
- At head height: 0.2–0.3 mG
Both are genuinely low by any meaningful standard. The WHO considers exposure under 1,000 mG safe for the general public. Even the highest readings in either sauna are 2–3 orders of magnitude below that threshold.
For context: a standard laptop measured at lap distance typically reads 2–5 mG. A hair dryer reads 30–400 mG at hand distance. Both of these saunas are among the lowest-EMF consumer products I have tested with that meter.
The Clearlight edges out the Sunlighten in my measurements by a small margin, and Clearlight offers a written lifetime guarantee that their EMF levels will not exceed stated limits — something Sunlighten does not explicitly match. If EMF minimization is an overriding priority, the Clearlight has a slight edge. If you are just looking for genuinely low EMF from a responsible brand, both qualify.
One thing worth noting: ELF (extremely low frequency electric fields) is a separate measurement from magnetic field EMF and is often overlooked. Both brands measure under 1 V/m for ELF. This matters because some sensitive individuals report symptoms from ELF fields even when magnetic fields are low.
Heat Performance: How They Actually Feel
Max temperature is identical — 165°F for both. Preheat time favors the Clearlight by about 5 minutes (35–40 min vs 40–45 min), though both require planning your session in advance. Neither is a heat-on-demand sauna you can step into 10 minutes after you decide to use it.
The subjective experience of heat is where the two diverge most noticeably.
The Clearlight Sanctuary 1 heats via large panels covering the back wall, both side walls, and under the bench. Sitting in the Clearlight, you feel radiant warmth from multiple directions simultaneously. Sweat starts at 8–10 minutes for me. By 15 minutes at 145°F, I am sweating substantially across my full body, including my legs — which are directly above the under-bench heater panels.
The Sunlighten mPulse’s heat feels more directional. The SoloCarbon panels are effective, but the heat distribution depends on which program you are running. In the “cardio” preset (higher far-infrared output), the heat feels deep and penetrating but slightly less enveloping than the Clearlight. In the “detox” preset (full spectrum), it is comparable. Sweat start time is about 10–12 minutes for me at similar settings.
This is not a meaningful performance deficit — both saunas heat effectively and produce the kind of full-body sweat that is the point. But if you sit in both back-to-back, the Clearlight’s heat distribution feels more uniform.
Build Quality and Wood
Clearlight Sanctuary 1 uses Canadian hemlock. This is a closed-grain softwood that is traditional in North American sauna construction — it handles repeated heat cycles well, does not splinter, and develops a pleasant warm smell when heated. The Clearlight’s finish is tight and well-sealed. After years of near-daily use in the Sanctuary 2, I have seen no warping, cracking, or discoloration beyond the natural patina of heated wood. Panel alignment on the Sanctuary line is excellent — the tongue-and-groove construction feels tight and the glass door seals with no visible gaps.
Sunlighten mPulse uses basswood in some configurations and cedar in others depending on the model variant. Basswood is a lighter, finer-grained wood than hemlock — it looks cleaner and more refined out of the box. The tradeoff is that basswood is slightly more prone to minor surface dents and scratches than hemlock, and some users report a faint off-gassing smell from new basswood saunas that requires 3–5 high-temperature break-in sessions to dissipate. Cedar is aromatic and traditionally sauna-appropriate, but some users have sensitivities to cedar oils — worth noting if you are sensitive to strong wood scents.
Both cabins are well-built. The Clearlight feels more utilitarian and solid. The Sunlighten looks more premium and modern. If the sauna will be in a visible room rather than a garage, the Sunlighten’s aesthetics have an edge.
Assembly for both is a 2-person job taking 90–120 minutes. The Clearlight’s panel system is slightly simpler; the Sunlighten’s touchscreen wiring adds complexity. Both include adequate instructions, though third-party YouTube assembly guides are better for both.
Smart Features and Controls
This is where the Sunlighten genuinely leads and the gap is significant.
Clearlight Sanctuary 1 has a basic digital control panel. You set the temperature, set a timer, and that is essentially it. There is no app, no remote preheat, no pre-set programs. The chromotherapy LED lighting has a controller, but the experience is manual. Some users find this simplicity appealing — you turn on a sauna, not a computer. But if you want to start preheating your sauna while still at the gym, you cannot do that with the Clearlight.
Sunlighten mPulse runs an Android-based touchscreen controller with pre-built wellness programs. The programs are named and marketed somewhat breathlessly (“Detox,” “Cardio,” “Anti-Aging,” “Weight Loss,” “Pain Relief,” “Relaxation”), but what they actually do is set different ratios of near, mid, and far infrared intensity combined with specific temperature profiles. The science supporting these specific programs is mixed — the sauna industry has a tendency to overstate therapeutic distinctions — but the ability to modulate infrared spectrum is real technology.
The Sunlighten app lets you start preheating remotely, monitor session progress, and log usage. This is a genuinely useful feature for building the preheat into your routine without being physically present. The Harman Kardon audio system sounds noticeably better than any portable Bluetooth speaker you would bring into a Clearlight.
If technology and integration matter to you, the Sunlighten’s features justify a portion of the price premium. If you want a simple, extremely well-built sauna that heats evenly and lasts decades, the Clearlight’s simplicity is a feature.
Warranty Comparison
Clearlight: Lifetime warranty on heaters, wood, and structure. This is the most comprehensive warranty in the infrared sauna industry and Clearlight has been honoring it for over 20 years. Their customer service has a strong reputation in the r/Sauna community — multiple first-hand accounts of warranty claims being handled quickly and without friction.
Sunlighten: 5-year warranty on heaters and electrical components, lifetime warranty on the cabinet structure. The heater warranty gap is the most meaningful difference. Infrared heater panels typically last 15,000–20,000 hours, which at daily 30-minute use is 30–40 years. A heater failure within 5 years would be unusual, but the Clearlight’s lifetime coverage is a genuine differentiator, not a technicality.
For a $4,000–$5,500 purchase you intend to use daily for 15+ years, warranty terms matter. The Clearlight’s lifetime heater coverage is meaningfully better.
Who Each Sauna Is For
Buy the Clearlight Sanctuary 1 if:
- Low EMF is a primary concern and you want the lowest measured levels with a lifetime guarantee
- You value simplicity — a well-built sauna without app dependencies or complex controls
- You want the best warranty in the industry
- You prefer Canadian hemlock construction
- $4,000 is your budget ceiling for a 1-person cabin
Buy the Sunlighten mPulse if:
- You want to independently control near, mid, and far infrared intensity for different sessions
- Remote preheat via smartphone is important to your routine
- You want built-in Harman Kardon audio without a separate speaker
- The aesthetic of a more modern, tech-forward cabin matters to you
- You will actually use the pre-set wellness programs and want the flexibility to tune sessions
Neither is a wrong choice at this price point. Both will last 20+ years with basic maintenance, both produce meaningful heat and low EMF, and both represent the top tier of what home infrared saunas can be. The Clearlight is better value. The Sunlighten is more technologically advanced.
Companion Products for Either Sauna
Whether you buy the Clearlight or the Sunlighten, you need the same supporting equipment:
EMF meter — Verify your specific unit’s readings yourself rather than relying on manufacturer data. The TriField TF2 is the standard for this. Check price on Amazon
Seat and backrest towels — Essential for any wood sauna. Sweat deposits stain and eventually odorize unsealed hemlock and basswood. Get 4–6 for rotation so you always have dry ones. Check price on Amazon
Infrared thermometer or sauna thermometer/hygrometer — The built-in thermostats on both units can read ±5°F off. A $12 independent thermometer lets you verify actual temperature. Check price on Amazon
Electrolyte powder — LMNT or similar. You lose more electrolytes in a 30-minute infrared session than you expect, particularly potassium and sodium. Replacing them post-session prevents the fatigue some people report after heavy sauna use. Check price on Amazon
Sauna brush or loofah — Light dry brushing before sessions helps open pores. Many daily sauna users report more solid sweating response after adding pre-session brushing. Check price on Amazon
Cedar or eucalyptus essential oil — A few drops on a small towel near (not on) the heater panel adds an aromatherapy dimension. For the Clearlight’s hemlock cabin in particular, eucalyptus lifts the experience noticeably. Check price on Amazon
Real Owner Perspectives
The r/Sauna and r/longevity communities have extensive threads comparing these two brands. A few patterns I have noticed from years of reading those discussions:
Clearlight owners are more vocal about the warranty service experience — multiple verified first-hand accounts of heater replacements handled under the lifetime warranty without charge. The brand has been around since 2000 and the warranty appears to be real rather than nominal.
Sunlighten owners are more vocal about the app and smart features, particularly the remote preheat. The most common complaint in those threads is the mPulse’s touchscreen occasionally running slow or requiring a reboot — an expected issue with any Android-based device used daily in a hot environment.
Both brands have strong long-term owner satisfaction. The Clearlight subreddit discussions trend toward “I bought this 8 years ago and it still performs identically.” The Sunlighten discussions trend toward “the programs have changed how I use the sauna.” Different satisfactions from different priorities.
Electricity Cost and Running Costs
Both saunas run on standard 120V household power with a dedicated 20-amp circuit.
Clearlight Sanctuary 1: ~1,500–1,750W. At $0.15/kWh and 40 minutes preheat plus 30 minutes session, cost is approximately $0.40–0.50 per session. Daily use over a year: roughly $150–180 in electricity.
Sunlighten mPulse: ~1,500W. Similar cost per session — $0.40–0.50 at typical rates. The longer preheat time (40–45 minutes) adds marginally to electricity use versus the Clearlight.
Neither sauna will meaningfully change your electricity bill. Over a 5-year ownership period at daily use, electricity is roughly $750–900 — less than the price gap between the two models.
Both require a dedicated 20-amp circuit. If your sauna location does not already have one, budget $150–300 for an electrician to add a circuit before delivery.
The Price Gap Question
You are looking at roughly $1,500 in price difference between these two saunas. Here is what that premium actually buys at the Sunlighten:
- Independent near/mid/far infrared control (genuinely unique technology)
- Built-in Harman Kardon audio system (~$200–300 value)
- Android touchscreen with pre-set programs
- Smartphone app with remote preheat
- More modern aesthetic with basswood construction option
Here is what you give up versus the Clearlight:
- Shorter heater warranty (5 years vs lifetime)
- Slightly higher measured EMF in my testing
- Slightly longer preheat time
My honest assessment: the Sunlighten’s technology is impressive and the SoloCarbon independent spectrum control is real. But for most daily sauna users, the Clearlight’s heating performance, lower measured EMF, and lifetime warranty represent better long-term value. The Sunlighten makes sense if you are a data-driven user who will actually experiment with different infrared programs and care about the smart features.
If you would buy a “simple” car over one with complex electronics because you want fewer things to go wrong over 15 years, the Clearlight is your sauna. If you want the most sophisticated product available and will use its features, the Sunlighten is worth the premium.
What Real Users Complain About
Specific frustrations from verified reviews and r/Sauna threads — from buyers who chose one of these two premium saunas and found real-world issues.
Clearlight Sanctuary 1 wood has a slight chemical smell in humid weather that took months to dissipate. “My Clearlight Sanctuary 1 arrived beautifully packaged and assembled without issues. However, in my first few months of use, I noticed a faint chemical smell during sessions that was more noticeable on humid days. Clearlight confirmed it comes from the non-toxic sealant used on the exterior wood panels and advised that it dissipates over time. It was gone by month three. In the meantime I left the door slightly ajar for the first 15 minutes of each session. Not harmful but unexpected from a premium product.” The sealant off-gassing is noted by a minority of Clearlight owners, usually in humid climates; it resolves on its own within 60-90 days.
Sunlighten mPulse app connectivity is unreliable for Android users. “The Sunlighten mPulse app remote preheat feature is one of the main reasons I paid the premium. On my Android phone, the app disconnects from the sauna’s WiFi module about 50% of the time and requires going into my phone settings to manually reconnect. The remote preheat fails when the app drops connection. Apple users in Sunlighten owner groups report fewer connection issues — the problem appears more Android-specific. Sunlighten support helped me add the sauna to a fixed IP on my router, which improved it to about 80% reliability.” App connectivity issues are the most common complaint in Sunlighten mPulse threads; iOS users have a meaningfully better experience than Android users.
Both brands’ lead times are significantly longer than displayed shipping estimates. “I ordered my Clearlight Sanctuary 1 on a date when the website showed ‘4-6 weeks lead time.’ My actual delivery was 10 weeks. Clearlight apologized and explained demand had increased. A friend ordered a Sunlighten mPulse the same month and waited 13 weeks. If you are buying either of these saunas for a specific event, move-in date, or gift, add 4-6 weeks of buffer to whatever lead time you are quoted. Both brands build to order and their stated lead times consistently run short.” Both brands build custom to order; lead times vary seasonally and both regularly run longer than estimated at time of sale.
Bottom Line
Clearlight Sanctuary 1: The better long-term value. Lowest tested EMF, lifetime warranty, even True Wave II heat distribution, Canadian hemlock construction. About $4,000. If you want a premium single-person infrared sauna with no complicated tech and the best warranty in the industry, this is the one. Check price on Amazon
Sunlighten mPulse: The more sophisticated sauna. Independent spectrum control, smart features, remote preheat, Harman Kardon audio. About $5,500. If you want the most technologically advanced home sauna available and will actually use the programmability, the premium is justified. Check price on Amazon
Both will outlast most of the other things you buy this year.
Last updated March 2026. Prices and specifications subject to change — verify current pricing directly with manufacturers before purchasing.