HoMedics Premium Steam Sauna Review: Does the 135°F Upgrade Deliver?

The HoMedics Premium Steam Sauna (model SPE-SN400, sold mainly through Costco) is one of the hotter portable steam tents on paper — an advertised 135°F at 100% humidity from a 1,600W steam generator, versus 115°F for HoMedics' other portable models. This review covers what it really does, whether that 135°F number holds up, how it compares to the SaunaZen, the maintenance reality, and when spending more on a permanent sauna or steam shower makes better sense.

HoMedics Premium Steam Sauna Specs

Verified from Costco's listing and HoMedics' product pages:

On price: this fluctuates a lot. Costco has recently shown it near $180, while HoMedics has listed its version around $350. Treat it as a ~$180–$350 product depending on retailer, sale and availability, and check current pricing before buying. Pricing checked: August 2026.

Does It Really Reach 135°F?

This is the product's headline differentiator, so it's worth being precise. The 135°F figure comes straight from Costco's listing ("Best-In-Class 135°F Heat With 100% Humidity"). But HoMedics' Australian page for the same SPE-SN400 lists 54°C — about 129°F — and independent testing of the related SaunaZen measured roughly 4°F below its advertised maximum. Portable steam tents commonly run a little under their listed ceiling, especially in cooler rooms.

Practically: in a warm room the Premium should run meaningfully hotter than a 115°F tent; in a cool basement expect less. And because steam sits at ~100% humidity, your sweat can't evaporate efficiently — so even 115–120°F feels more intense than the same number in a dry sauna. Start on the lowest of the three heat levels and build up.

HoMedics Premium vs. SaunaZen: Which Should You Buy?

These two get cross-shopped constantly. Here's the corrected comparison — using only differences that actually hold up:

Buy the Premium if you want the hotter advertised ceiling (135°F) and Costco's return policy. Buy the SaunaZen if 115°F is plenty and you'd rather buy direct from HoMedics. Maintenance, portability and single-person capacity are the same for both.

Setup, Size & Comfort

Setup is genuinely the highlight. The frame pops into shape in under 90 seconds; what takes longer for first-timers is filling the 1.8L generator, attaching the hose, and waiting the 10–15 minutes to steam. Put the unit on tile, vinyl or concrete (not hardwood), keep a towel around the perimeter, and set up near a window or bath for post-session ventilation. Folding it back into the bag is the fiddly part — reviewers of the sibling SaunaZen note the frame has a specific collapse sequence and recommend checking the instructions before forcing it.

Size & comfort. It's a one-person tent with a foldable chair that's stable but not padded — a firm cushion or folded towel helps on longer sessions. The practical fit constraint is the interior height of about 68.9 inches: seated users generally fit, but the taller you are, the closer your head sits to the zippered opening, which lets heat escape around your upper body. Costco markets it as an extra-large tent that "accommodates all heights," so rather than trust any single seated-height figure, use the dimensions and your own torso height as the guide — if full upper-body steam coverage matters to you and you're tall, factor that in.

How to Clean the HoMedics Steam Sauna & Prevent Mold

The single most common complaint across all portable steam tents — HoMedics or otherwise — is a musty smell developing in the fabric. It's a category reality, not a HoMedics defect: damp fabric stored folded can begin growing mold within 24–48 hours. The good news is prevention is simple and non-negotiable.

After every single session:

1. Drain the steam generator tank completely.
2. Wipe down the interior with a dry towel — focus on seams, corners and the floor.
3. Leave the tent open and upright for 1–2 hours; do not fold or store it damp.
4. Ventilate the room (open a window or run a fan).

Weekly: wipe the fabric with a mild, diluted detergent; descale the generator tank with a 50/50 white-vinegar-and-water rinse, then drain and rinse twice; check the hose outlet for mineral buildup. In hard-water areas, distilled water slows scale (it's a best practice, not a requirement). If a musty smell persists after a full drying cycle, moisture is trapped in the middle layer — dry more aggressively; if visible mold returns on seams, retire or replace the tent.

Pros & Cons

Who Should Buy It?

HoMedics vs. a Permanent Sauna or Steam Shower

Most people reading a $180–$350 steam-tent review won't buy a $2,000 cabin — and that's fine. But if the maintenance and teardown are exactly the friction that will stop you using it, it's worth knowing what stepping up actually looks like. Two honest upgrade paths:

If you mainly want the heat/sweat benefits without the teardown, the closest "upgrade from portable" is a compact infrared cabin. Our most affordable is the Dynamic Barcelona Elite 1–2 person infrared sauna at $1,999 — and tellingly, it runs on the same standard 120V household outlet as the HoMedics tent, assembles tool-free, and never needs to be dried out and folded away. It's a permanent hemlock cabin with Bluetooth and LED controls, not a fabric tent with a shelf life.

If it's specifically steam you love, a built-in system is the real endgame: a permanent home steam shower (Mr. Steam, ThermaSol) delivers steam on demand with zero teardown, no fabric to mold, and the kind of bathroom upgrade that tends to add resale appeal to a home rather than ending up in a closet.

Health Benefits: What's Realistic

What heat and steam can reasonably support: relaxation and stress relief, temporary post-workout muscle comfort, and a warm-then-cool wind-down that many people find helps their evening routine. Sweating is an experiential effect of the humidity, not a deep-cleaning mechanism.

What it won't do: meaningfully "detox" you (sweat is ~99% water and salt; your liver and kidneys handle that), cause fat loss (post-session weight drop is water and returns with rehydration), or treat disease — it isn't a medical device. The strongest sauna health evidence comes from traditional higher-temperature saunas used habitually, not portable steam tents specifically.

Check with a clinician first if you're pregnant, manage a heart condition or blood pressure, take medications affecting heat tolerance, or have a neurologic condition — and stop immediately if you feel dizzy, weak or short of breath. For more, see our sauna guides.

Frequently Asked Questions

Does the HoMedics Premium Steam Sauna actually reach 135°F?

135°F is the advertised ceiling, not a guaranteed figure. HoMedics' Australian page for the same SKU lists ~129°F, and testing of the related SaunaZen came in about 4°F under its max. Treat 135°F as best-case; expect a bit less in a cool room.

Is the HoMedics Premium Steam Sauna worth it?

For a solo user who wants cheap, storable steam and will dry it after each use, yes. If you want steam or heat without the teardown and mold risk, a permanent steam shower or an entry-level infrared sauna is a better long-term class of product.

What's the difference between the Premium and the SaunaZen?

Mainly the advertised max temperature (135°F vs 115°F), wattage (1,600W vs ~1,500W) and retail channel. Both use the same three-layer fabric, 100% humidity and up to 60-minute sessions — the fabric is not an upgrade.

How long does it take to heat up?

About 10–15 minutes to usable steam, even though the tent itself pitches in under 90 seconds. Start the generator before you get ready.

How do you prevent mold?

Drain the tank, wipe the interior, and leave the tent open and upright 1–2 hours after every session; never fold it damp. Mold can start within 24–48 hours on damp fabric.

Can you use essential oils?

Only in the included diffuser tray if the manual allows — never in the steam generator tank. Oils are aromatic only and don't protect the fabric from mold.

How much does it cost to run?

Roughly $0.29–$0.36 per 60-minute session at ~$0.18/kWh; about $50–$60/year at three sessions a week (more in high-rate states).

Can tall people fit inside?

The ~68.9-inch interior height is the constraint. Seated users generally fit, but taller users sit closer to the zippered opening, reducing upper-body heat coverage.

What is the warranty?

Typically a 1-year limited warranty on HoMedics portable saunas. Confirm terms on your receipt, as Costco purchases may be handled differently than direct HoMedics orders.

Sources

• Costco — HoMedics Premium Steam Sauna listing (SPE-SN400, item 2849544)
• HoMedics — SaunaZen product page (three-layer fabric, 115°F)
• HoMedics — Premium Steam Sauna (US) product page
• HoMedics AU — Premium Steam Sauna page (lists 54°C / ≈129°F)
• Business Insider — tested SaunaZen review (measured temperature)
• CNN Underscored — SaunaZen tested review (folding, distilled water)
• Cleveland Clinic — sauna benefits, safety and contraindications
• Healthline — steam room benefits, risks and vs. sauna
• Overland Sauna — preventing mold in a sauna tent (EPA 24–48h timeline)

Ratings are editorial opinion. This article is general education, not medical advice.