Last updated 2026-07-09

What is a 2-person hybrid infrared and steam sauna, exactly?

A hybrid sauna is a cabinet that houses two distinct heating systems: far-infrared (FIR) ceramic or carbon-fiber panels, and a steam generator that pumps water vapor into the same space. You can run them separately or together. That's the whole concept.

Most traditional infrared saunas operate at 120-150°F with very low humidity, maybe 10-20% relative humidity depending on how much you sweat. A steam room, by contrast, runs at 100-115°F with humidity at or near 100%. A hybrid gives you a dial for each variable. You can sit in dry infrared heat one morning, add steam the next day, or crank both simultaneously for a dense, humid heat that some people find more intense than either alone.

The "2-person" designation matters more than it sounds. A true 2-person cabinet is typically 47-60 inches wide and 35-40 inches deep, enough for two adults sitting side by side. Some manufacturers label a cabinet as 2-person when it's really a tight squeeze for one large adult and one medium-sized adult. Always check interior dimensions, more than the marketing label.

These units almost always arrive as pre-cut, interlocking panel kits. Assembly takes two adults roughly 2-4 hours. Electrical requirements vary by model, but most hybrid saunas with steam need a 20-amp or 30-amp dedicated circuit. Some plug into a standard 120V/15-amp outlet but sacrifice steam output capacity to do it. ^[1]

How does infrared heat differ from steam heat, and why combine them?

Infrared heat works by radiating electromagnetic energy in the 5-15 micron wavelength range, which the skin absorbs directly. The air temperature in the room stays relatively moderate, but your tissues heat up efficiently. That's why an infrared sauna at 130°F often feels less punishing than a traditional Finnish sauna at 170°F.

Steam heat is convective. Hot, saturated air surrounds your body, and because the humidity is so high, sweat can't evaporate, which prevents your skin from cooling itself. The result is a heavy, wet sensation that many people associate with a spa or Turkish hammam. Your cardiovascular system responds similarly to both, with heart rate increases comparable to light-to-moderate exercise. One review published in Mayo Clinic Proceedings noted that regular sauna bathing is associated with improved cardiovascular outcomes, though the mechanism and optimal dose are still being studied. ^[2]

Combining them addresses a specific complaint: some people find pure infrared too dry, especially in winter when ambient humidity is already low. Cracked lips, scratchy throat, dry sinuses. Adding steam fixes that. On the other hand, some people prefer the deep-tissue penetrating sensation of infrared and would never use the steam feature. Honestly, if you're in the second group, just buy a quality infrared-only unit. The steam hardware adds cost and maintenance you won't use.

See our sauna vs steam room breakdown for a more detailed comparison of the two heat types.

What are the actual health benefits tied to each mode?

Let's be direct: the research base for sauna benefits is real but imperfect. Most of the big studies used traditional Finnish saunas (high temperature, low humidity). Fewer studies have isolated far-infrared specifically, and almost none have studied hybrid steam-plus-infrared as a combined modality. So claims need to be calibrated.

For cardiovascular health, a long-running Finnish cohort study (the Kuopio Ischemic Heart Disease Risk Factor Study) found that men who used a sauna 4-7 times per week had a 50% lower risk of fatal cardiovascular events compared to once-a-week users. ^[3] That's a significant association, though it comes from observational data, not a controlled trial.

For muscle recovery, the evidence is more modest. Infrared sauna sessions after exercise appear to reduce delayed-onset muscle soreness in some small trials, but effect sizes are small and study populations are narrow. Nobody should skip an ice bath and expect an infrared sauna to substitute perfectly. If recovery is a priority, contrast therapy with cold immersion after heat is where the protocol evidence is stronger. Our cold plunge benefits article covers the cold side of that equation.

For respiratory comfort, steam has a long traditional use for congestion relief, and some people with chronic sinusitis report symptom relief from steam sessions. Formal clinical evidence for steam sauna specifically is thin. The National Institutes of Health notes that breathing warm, moist air can help loosen mucus secretions, but stops short of recommending it as a treatment. ^[4]

Skin hydration is where steam genuinely pulls ahead. High-humidity sessions open pores and keep skin from dehydrating the way dry infrared can. If skin feel matters to you, steam is the mode to reach for.

Read more about the full sauna benefits picture.

How much does a 2-person hybrid infrared steam sauna cost?

Price ranges break down cleanly by tier:

Tier	Price Range	What you get
Entry-level	$1,800-$2,800	Thin hemlock or basswood, 1-2 FIR carbon panels, small steam generator (1-2L reservoir), limited controls
Mid-range	$2,800-$4,500	Canadian cedar or thicker hemlock, 4-6 carbon or ceramic panels, better steam output (3-4L), app or digital controls, chromotherapy LED
Premium	$4,500-$7,000+	Full-spectrum infrared (near + mid + far), larger steam generator (5-8L), medical-grade glass doors, better waterproofing, longer warranties

Those ranges reflect current retail prices across major online retailers as of mid-2025. Prices fluctuate based on shipping costs, tariffs on imported goods, and whether you're buying during a sale event.

Installation cost is on top of the unit. If you need an electrician to run a dedicated 20-30 amp circuit, budget $150-$400 depending on your panel's proximity to the sauna location. ^[5] If you're putting it outdoors or in a garage, weatherproofing and a GFCI outlet add more.

Don't overlook operating cost. Running a 2-person hybrid sauna for a 45-minute session typically draws 1.5-3.5 kWh depending on the heater wattage and whether steam is active. At the U.S. average residential electricity rate of about $0.17/kWh (EIA, 2024), that's $0.25-$0.60 per session. ^[6] Cheap, but it adds up to $90-$220/year at daily use.

Entry hybrid sauna (unit + install + electricity)	$2,400
Mid-range hybrid sauna (unit + install + electricity)	$4,000
Premium hybrid sauna (unit + install + electricity)	$6,200
Professional custom steam room (construction + electricity)	$8,000
Portable steam tent (unit + electricity)	$340

Source: U.S. EIA residential electricity rate 2024 ($0.17/kWh); unit price ranges from current retail market

What should you look for in a 2-person hybrid model before buying?

Interior dimensions come first. Manufacturer photos are often shot with a wide-angle lens. Ask for interior width, depth, and ceiling height. For two adults to sit comfortably, you want at least 47 inches of interior width and 36 inches of depth. Ceiling height should be at least 74 inches for standard-height adults.

Wood species matters for steam durability. Cedar is the gold standard because it's naturally resistant to moisture-related warping and mold. Hemlock and basswood are fine for dry infrared sessions, but repeated steam exposure over years can cause cheaper woods to swell, warp, or develop mildew. If the steam feature is why you're buying the unit, verify the interior wood and look for sealed seams.

The steam generator reservoir size determines session length before auto-shutoff. A 1.5L reservoir at full output might last 20-25 minutes. A 5L reservoir can sustain a 60-minute session. Check whether the reservoir is accessible from inside the cabin or requires opening a panel, and how difficult it is to drain and dry after use. Standing water in a steam generator breeds bacteria and mold over time.

Panel coverage and wattage: for a 2-person unit, look for at least 1,800-2,500 total watts of infrared panel output, ideally with panels on multiple walls so heat is distributed evenly. Carbon panels heat more evenly; ceramic panels heat faster and get hotter. Full-spectrum units add near-infrared elements, which some practitioners prefer for skin benefits, though the research specific to near-infrared is thinner than for far-infrared.

Warranty terms reveal quality faster than marketing copy. Reputable brands offer 3-7 years on the structure, 2-5 years on heaters, and 1-2 years on electronics. A 1-year blanket warranty on a $4,000 sauna is a red flag.

For a broader look at home unit options, check our home sauna buying overview.

How does a hybrid sauna compare to a portable steam sauna for 2 people?

A portable steam sauna for 2 people is a fundamentally different product. These are fabric-and-frame tents with a separate plug-in steam generator, usually rated for one person sitting in a collapsible chair with their head out the top. The "2-person" versions exist but are cramped, typically 55x43 inches of floor space, and they work purely via steam with zero infrared component.

Portable units cost $80-$400 and store in a bag. They take 10-15 minutes to heat up, use a small 1-3L external boiler, and produce a genuinely sweaty experience at 110-115°F. For apartment dwellers with no room for a cabinet, they're a legitimate option.

Compared side by side:

Feature	Hybrid cabinet (2-person)	Portable steam tent (2-person)
Price	$2,000-$6,000+	$80-$400
Space required	40-55 sq ft permanent	Storable
Infrared panels	Yes	No
Steam quality	Good to excellent	Basic to good
Session comfort	Bench seating, enclosed	Head exposed, cramped
Maintenance	Moderate	Low
Durability	10-20 years (good units)	1-5 years

If two people actually want to sit together in steam, a portable tent doesn't deliver. The head-out design means only the body gets heat, and personal space is minimal. A 2-person hybrid cabinet is a legitimate shared experience; a 2-person portable tent is mostly marketing. Our portable sauna guide covers the portable category in more depth if that's still on your shortlist.

What electrical and space requirements do you need before installation?

Most 2-person hybrid saunas require a dedicated 120V/20-amp or 240V/30-amp circuit. Check the unit's spec sheet before you buy. Running both infrared panels and the steam generator simultaneously on a shared circuit can trip a breaker or, worse, create a fire hazard. The National Electrical Code (NEC) Article 422 covers fixed-in-place appliances and requires a dedicated branch circuit for appliances rated over 50% of the circuit's capacity. ^[7]

GFCI protection is required by NEC for indoor wet locations. A steam sauna qualifies. If your electrician doesn't suggest a GFCI breaker or outlet for the circuit, ask about it explicitly.

Floor requirements: most units are designed for flat, level floors. Standard hardwood, tile, or concrete all work. Carpet is workable but retains moisture under the cabinet's base. Most manufacturers void the warranty if the unit is installed on carpet. If you're installing in a bathroom, verify the floor's weight rating. A fully assembled 2-person hybrid cabinet with two adults weighs 400-600 lbs.

Ceiling height for the room, more than the sauna, matters for air circulation and heat dissipation. Ideally the room has at least 12 inches of clearance above the sauna's roof for heat to escape. Tight closet installations can cause overheating of the exterior and electronics.

Ventilation: unlike a full outdoor sauna shed, an indoor cabinet doesn't require a separate vent to outside air, but the room itself needs adequate airflow. A bathroom exhaust fan is enough for most installations. Without it, ambient room humidity will rise over time and cause mold on surrounding walls.

How do you maintain a hybrid infrared and steam sauna to make it last?

Steam maintenance is the differentiator. An infrared-only sauna needs almost nothing: wipe down the bench, air it out, done. Add steam and you have standing water, mineral deposits, and mold risk.

After every steam session, drain the reservoir completely. Most units have a drain valve or tube for this. Leaving water in a warm reservoir for 24+ hours is asking for bacterial growth. Every 2-4 weeks, descale the steam generator with a citric acid solution (roughly 1 tablespoon of citric acid powder in 1 liter of water). Run it through a short cycle, then rinse. This prevents mineral scale from reducing output or burning out the heating element. ^[8]

The wood interior needs occasional light sanding with 220-grit sandpaper if it develops gray mold spots or feels rough. Don't apply any sealant or stain to the interior wood. The wood needs to breathe and offgas normally. Sealants trap moisture and create a chemical-off-gassing environment when hot.

Infrared panel connections should be inspected annually. Look for loose connectors, scorched wiring near panel edges, or discoloration of the wood behind panels. A qualified electrician should check any connection that looks unusual.

The glass door seal degrades over time in high-humidity environments. Inspect the door gasket for cracking or pulling away from the frame. A failed seal lets steam and heat escape, reduces session quality, and causes moisture damage to the surrounding wall.

Realistically, a well-maintained unit from a reputable brand should last 10-15 years. A cheap unit with poor wood quality and a weak steam generator might need significant repairs or replacement within 3-5 years.

Is a 2-person hybrid sauna good for contrast therapy with cold plunging?

Yes, and this is honestly one of the best use cases for owning a 2-person unit. Contrast therapy, alternating between heat and cold, has a legitimate body of evidence behind it for reducing perceived muscle soreness and improving recovery after exercise. A 2025 systematic review in the International Journal of Sports Physiology and Performance found that contrast water therapy was more effective than passive rest for reducing muscle soreness and fatigue, though effect sizes were modest. ^[9]

The typical home contrast protocol: 15-20 minutes in the sauna, then 2-3 minutes in cold water, repeated 2-4 times. Doing this with a partner in a 2-person sauna makes the protocol more enjoyable and more sustainable as a habit.

Pairing a hybrid sauna with a cold plunge tub or ice bath in the same space is achievable in a garage or basement with about 100-150 square feet. The sauna cabinet sits in one corner; the cold plunge or ice bath sits nearby. Some people set up the cold plunge outdoors adjacent to an indoor sauna and use the transit between them as a brief decompression moment.

SweatDecks stocks cold plunge and sauna combinations specifically sized for home use, if you want to price the two together rather than sourcing them separately.

For more on the cold side of the equation, our cold plunge guide covers what to look for in a home tub, and cold plunge benefits covers the research.

Which brands make legitimate 2-person hybrid infrared steam saunas?

A few names appear consistently across retailer listings and owner review threads as of 2025. This is not an endorsed or exhaustive list, but it gives a starting framework.

Dynamic Saunas makes entry-to-mid-range units with hybrid options in the $2,000-$3,500 range. Their Barcelona and Bellagio models are commonly cited. Build quality is acceptable for the price but wood thickness is on the thinner side.

Sunray Saunas offers mid-range hybrids in the $3,000-$4,500 range. Canadian hemlock construction, better panel configurations, and consistently positive owner reports on steam generator longevity.

Health Mate has been building saunas since 1979 and offers full-spectrum hybrid models at the premium end, $4,500-$7,000+. Their heaters have a good reputation and they offer a more meaningful warranty structure than most.

JNH Lifestyles makes popular infrared-only saunas and some hybrid models in the $2,500-$4,000 range. Their fit and finish is generally better than the price suggests, though the steam generator on some models has been noted as underpowered for sustained high-humidity sessions.

When evaluating any brand, search for warranty claim experiences in owner forums (Reddit's r/Sauna is a good signal), more than the product listing reviews which can be gamed. Ask the retailer directly: what is the actual process for a warranty claim, and who covers parts shipping?

For broader context on the home unit landscape, our home sauna article covers the full category.

Are there safety risks specific to hybrid saunas you should know about?

The basic sauna safety rules apply: don't use alcohol before or during a session, stay hydrated, limit sessions to 15-20 minutes if you're new to sauna, and never use a sauna if you're pregnant without explicit clearance from your doctor. The American College of Obstetricians and Gynecologists advises avoiding any activity that raises core body temperature above 102.2°F during pregnancy. ^[10]

For hybrid saunas, there are a few additional considerations.

Electrical safety with steam: water and electricity are a bad combination. The steam generator creates condensation inside the cabinet. All wiring inside a hybrid unit should be rated for damp or wet locations. If a unit's wiring doesn't specify this, that's a concern. Always use the GFCI-protected circuit mentioned earlier.

Mold: if the steam system isn't drained and cleaned regularly, mold grows on interior wood surfaces and inside the generator reservoir. Inhaling mold spores in a hot, enclosed space is a genuine respiratory hazard. This isn't hypothetical; it's a real owner complaint in forums where people bought units and didn't maintain them. The fix is simple maintenance, but it requires actual commitment.

Overheating in small rooms: a 2-person hybrid sauna in a small bathroom or closet with no ventilation can raise the ambient room temperature enough to affect thermostat readings, smoke detectors (false alarms from steam), and wall-mounted electronics.

Carbon monoxide: not a risk from the sauna itself since it's electrically powered. But if your sauna is in a garage that also has gas appliances or an attached vehicle, ensure the garage has proper CO detection.

For most healthy adults using a properly installed, maintained unit, the risk profile is low.

Is a 2-person hybrid sauna actually worth the premium over infrared-only?

Here's an honest take: for most people, probably not.

A quality infrared-only 2-person sauna in the $2,000-$3,500 range will deliver 90% of the heat therapy benefits that research actually supports. It's simpler, requires less maintenance, and the wood will last longer without steam-related humidity cycling.

The hybrid makes sense if at least one of the following is true:

1. You genuinely enjoy steam rooms at a gym or spa and want to replicate that experience at home. 2. You have dry skin or respiratory sensitivity and find pure infrared air drying or irritating. 3. You want the flexibility of both modes for different sessions or different users.

If you're buying a hybrid just because it sounds more premium, that's a $500-$1,500 premium for a steam generator you might use twice. The steam component is also the most likely part to fail or need servicing over time.

That said, if you do want steam, a hybrid beats owning two separate units. A standalone steam room build runs $3,000-$10,000 for professional installation. A hybrid gives you both modalities in one 40-50 square foot footprint for $3,000-$5,000. That's a real value proposition for the right buyer.

SweatDecks carries hybrid models alongside infrared-only and traditional options. Worth comparing them side by side with specific dimensions and wattage specs before committing.

If you're still weighing options broadly, our sauna hub has comparisons across all formats, and the outdoor sauna page covers what's possible if you have the yard space for a more permanent structure.

Frequently asked questions

Can a 2-person hybrid sauna fit in a standard bathroom?

Most 2-person hybrid cabinets are 47-55 inches wide and 35-40 inches deep. That's roughly 13-15 square feet of floor space, plus clearance around all sides for airflow. A full-size master bathroom can usually accommodate one, but a 5x8 foot bathroom almost certainly cannot. Measure carefully, including door swing, before ordering. Shipping these units is expensive and returns are often complicated.

How long does a hybrid sauna session typically take, including warm-up time?

Infrared panels take 10-20 minutes to reach operating temperature. Steam generators heat water to boiling in roughly 5-10 minutes, but the steam doesn't saturate the cabin until the unit has been running for another 5-10 minutes. Budget 20-30 minutes from startup to comfortable session conditions. Session length itself is typically 20-45 minutes for healthy adults. Total time commitment per session including cool-down is about 60-75 minutes.

What wood is best for a hybrid sauna that uses steam regularly?

Canadian red cedar is the best choice for steam exposure because of its natural oils, which resist moisture absorption, warping, and mold. Western red cedar is widely available and priced mid-range. Hemlock and basswood perform acceptably for occasional steam use but are less durable under daily high-humidity sessions. Avoid engineered wood or MDF panels in any hybrid unit regardless of the sales pitch around them.

Do I need a building permit to install a 2-person indoor sauna?

Usually no permit is required for a pre-built plug-in cabin that sits on your existing floor. But you almost always need an electrical permit for the dedicated circuit, which must be inspected. If you're building a permanent tiled steam room or cutting into walls, a full permit is likely required. Check with your local building department. Rules vary by municipality, and some HOAs have their own restrictions.

What's the difference between full-spectrum infrared and far-infrared in a hybrid sauna?

Far-infrared (FIR) operates in the 5-15 micron wavelength range and is the most common type in home saunas. Full-spectrum adds near-infrared (0.7-1.4 microns) and mid-infrared (1.4-5 microns) elements. Near-infrared penetrates skin more shallowly and is associated with some light therapy research, though clinical evidence is thinner than for FIR. Full-spectrum units cost more. For most buyers, a quality far-infrared unit is sufficient.

How often should I clean the steam generator in a hybrid sauna?

Drain the reservoir completely after every steam session. Descale with a citric acid solution every 2-4 weeks if you use steam regularly, or monthly for occasional use. Wipe down interior surfaces weekly if steam is part of your routine. Neglecting the steam generator is the most common cause of early unit failure in hybrid saunas. Most manufacturers specify cleaning intervals in the warranty documentation; follow those to keep the warranty valid.

Can two people use a hybrid sauna safely at the same time?

Yes, provided the unit is genuinely rated for two occupants and you both follow standard sauna safety guidelines: hydrate before and after, limit sessions to 15-20 minutes if either person is new to sauna, exit immediately if anyone feels dizzy or nauseous. Two people in an enclosed sauna do raise humidity and CO2 levels faster, which is another reason adequate wood and ventilation quality matters. Don't use alcohol before sessions.

Is a hybrid sauna better than a traditional Finnish sauna for two people?

It depends what you want. A traditional Finnish sauna runs at 170-195°F with low humidity and uses a wood stove or electric heater; it provides an intense heat load that most research on sauna health benefits was actually conducted with. A hybrid runs cooler (120-145°F) and adds steam as an option. If you want the closest thing to research-validated protocols, traditional wins. If you want versatility and easier installation, hybrid wins.

What amperage circuit does a 2-person hybrid sauna need?

Most 2-person hybrid models specify either a 120V/20-amp dedicated circuit or a 240V/30-amp circuit. Check the unit's label plate, more than the marketing description. Running infrared panels and a steam generator simultaneously can draw 1,800-3,500 watts, which exceeds a shared 15-amp circuit. The NEC requires dedicated branch circuits for appliances that exceed 50% of a circuit's ampacity. Have a licensed electrician verify your panel has capacity before the unit arrives.

How much electricity does a 2-person hybrid sauna use per month?

At daily 45-minute sessions, a 2-person hybrid sauna draws roughly 1.5-3.5 kWh per session depending on wattage and which modes are active. At the U.S. average residential rate of about $0.17/kWh (EIA, 2024), that's $7-$18 per month for daily use. Running steam alongside infrared adds to the draw. By comparison, a daily hot shower uses about 2-3 kWh depending on heater type, so sauna operating cost is in a similar range.

Can I use a hybrid sauna outdoors or in a garage?

Many hybrid cabinets are rated for indoor use only and will void the warranty if placed outdoors. However, most work fine in a covered, climate-controlled garage. Exposure to freezing temperatures can crack the steam generator's reservoir or damage electronics. If outdoor placement is the goal, look for units specifically rated for outdoor use or consider a purpose-built outdoor sauna cabin instead. A GFCI-protected outdoor outlet is non-negotiable for any outdoor electrical installation.

What's a realistic lifespan for a 2-person hybrid infrared steam sauna?

A well-maintained unit from a quality brand should last 10-15 years. The infrared panels themselves can last 20+ years; carbon panels are especially durable. The steam generator is the highest-wear component and may need replacement or repair at 5-8 years with regular use, depending on water mineral content and cleaning habits. Using a water softener or distilled water in the steam reservoir significantly extends generator life.

Does running steam in an infrared sauna damage the infrared panels?

Quality hybrid units are designed with moisture-protected panel housings and sealed connections. The panels should tolerate steam humidity without damage. That said, repeatedly soaking panel surfaces directly or using excessively hard water that leaves mineral deposits near panel vents can cause problems over time. Follow the manufacturer's guidance on steam settings and never pour water directly on infrared panels the way you would on sauna rocks in a traditional Finnish unit.

How does a hybrid sauna compare in price to building a steam room?

A professional custom steam room installation runs $3,000-$10,000 or more depending on tile work, waterproofing, steam generator size, and contractor rates. A 2-person hybrid sauna cabinet costs $2,000-$6,000 and requires only electrical work, not construction. The hybrid is almost always cheaper and faster to install. The trade-off is that a tiled steam room is more durable, holds heat better, and can be designed to fit any space. A cabinet is a box you assemble.

Sources

1. U.S. Consumer Product Safety Commission, Electric Sauna Heater Safety: Electrical requirements and safe installation standards for plug-in and hardwired sauna appliances
2. Mayo Clinic Proceedings, 'Cardiovascular and Other Health Benefits of Sauna Bathing' (2018): Regular sauna bathing is associated with improved cardiovascular outcomes; mechanism and optimal dose still under study
3. JAMA Internal Medicine, Kuopio Ischemic Heart Disease Risk Factor Study (Laukkanen et al., 2015): Men using sauna 4-7 times per week had a 50% lower risk of fatal cardiovascular events compared to once-a-week users
4. National Institutes of Health, MedlinePlus, 'Nasal congestion' entry: Breathing warm, moist air can help loosen mucus secretions
5. HomeAdvisor / Angi, Cost to Install a Dedicated Electrical Circuit (2024 national average): Electrician cost to run a dedicated 20-30 amp circuit ranges roughly $150-$400 depending on panel proximity
6. U.S. Energy Information Administration, Average Retail Price of Electricity to Residential Consumers, 2024: U.S. average residential electricity rate approximately $0.17 per kWh as of 2024
7. National Fire Protection Association, NEC Article 422: Appliances: NEC Article 422 requires a dedicated branch circuit for fixed-in-place appliances rated over 50% of the circuit's capacity
8. NSF International, Water Quality and Household Appliance Maintenance Guidelines: Citric acid descaling recommended for steam appliances to prevent mineral scale buildup in heating elements
9. International Journal of Sports Physiology and Performance, Contrast Water Therapy Systematic Review (2025): Contrast water therapy more effective than passive rest for reducing muscle soreness and fatigue after exercise, though effect sizes were modest
10. American College of Obstetricians and Gynecologists, 'Exercise During Pregnancy' Committee Opinion: ACOG advises avoiding activities that raise core body temperature above 102.2°F during pregnancy
11. U.S. Energy Information Administration, Residential Energy Consumption Survey: Household appliance electricity consumption data supporting per-session sauna energy cost calculations

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