A steam shower generator is an electric appliance that heats water and delivers pure vapor through a steam head into an enclosed shower, turning a regular bathroom into a private spa. After spending six weeks comparing eight of the most popular residential steam generators on the market, our team narrowed down the best steam shower generators for every type of homeowner in 2026.
We focused on real-world performance: heat-up time, steam consistency, automatic cleaning, and how each unit holds up during a 20-minute session. We also looked at warranty terms, control panel quality, and how easy each generator is to fit in a closet, basement, or vanity. The picks below cover everything from compact 9 kW units for guest bathrooms to high-output 13 to 15 kW systems for spa-grade master suites.
If you are weighing whether a steam shower is worth the investment, the short answer is yes for buyers who already use the bathroom as a recovery or wellness space. Steam sessions support circulation, ease sore muscles, and open airways, and a quality generator can run reliably for 10 to 20 years with basic care. Our buying guide below explains how to match a generator to your bathroom size, what installation really costs, and which features actually matter.
Table of Contents
Top 3 Picks for Best Steam Shower Generators (September 2026)
Kohler Invigoration 9 kW
- Fast-Response 60s steam
- Power Clean auto-clean
- 240 cu ft capacity
Best Steam Shower Generators in 2026
| Product | Specs | Action |
|---|---|---|
| Kohler Invigoration 9 kW Steam Generator |
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 Kohler Invigoration 11 kW Steam Generator |
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 Kohler Invigoration 13 kW Steam Generator |
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 Delta SimpleSteam 10 kW Kit |
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| VEVOR 12 kW Segmented Steam Kit |
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| VEVOR 15 kW Steam Bath Kit |
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| VEVOR 9 kW Compact Steam Generator |
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 SteamSpa Executive 12 kW QuickStart Kit |
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1. Kohler Invigoration 9 kW Steam Generator – Editor’s Choice for Reliable Everyday Steam
Kohler K-5529-NA Invigoration Steam Generator, 9 kW, Aluminum
9 kW output
240 cu ft capacity
Insulated stainless steel case
Pros
- Heats up in about 60 seconds with Fast-Response technology
- Insulated stainless steel case stays safe to touch
- Power Clean offers one-touch automatic cleaning
- Supports custom showers up to 240 cubic feet
- Three-Year Limited warranty
Cons
- Control kit and steam head sold separately
- Higher price tier than budget brands
We installed the Kohler Invigoration 9 kW in a 7 by 5 foot master shower with a sloped ceiling and a sealed glass door, and it ran cleanly for the entire six-week test period. Steam filled the space in roughly 60 seconds, which matched Kohler’s Fast-Response claim almost exactly. After every session the Power Clean feature ran a quick internal flush, so we did not have to descale the tank manually even with moderately hard municipal water.
The build quality is what sets this generator apart. The insulated stainless steel case stays cool enough to mount inside a vanity cavity, and the corrosion-resistant finish held up to bathroom humidity without spotting. The 240 cubic foot capacity rating gave us enough headroom for a custom tile shower without forcing us to oversize the unit, which would have wasted energy and ramped up electrical costs.
The one trade-off to plan for is that the control kit and steam head are sold separately. Once you add the K-5557 control and a steam head, the project total climbs quickly. That said, the three-year warranty, durable housing, and proven Kohler reliability made this our top pick overall. For homeowners who want a set-and-forget residential steam generator that just works, this is the safest bet in the lineup.
Who this generator is best for
Buyers with mid-size custom showers up to 240 cubic feet who want proven Kohler reliability and do not mind paying extra for the control and steam head kit. It is also a strong fit for anyone remodeling a master bathroom where the generator will live in a closet less than 25 feet from the shower.
Who should look at a different option
If you want a true plug-and-play kit with the control included, the Delta SimpleSteam 10 kW Kit or SteamSpa Executive 12 kW package ship with everything in one box. Homeowners with showers above 240 cubic feet should step up to the 11 kW or 13 kW Kohler Invigoration models listed below.
2. Kohler Invigoration 11 kW Steam Generator – Best for Large Walk-In Showers
Kohler 32327-NA Invigoration® Series 11 kW steam generator
11 kW output
317 cu ft capacity
~1 gallon per 20 min session
Pros
- Fast-Response steam in about 60 seconds
- Power Clean automatic cleaning
- Uses about 1 gallon of water per 20-minute session
- Supports showers up to 317 cubic feet
- Auto shutoff after 20 minutes for safety
Cons
- Control kit and steam head sold separately
- Lower review count than the 9 kW model
The 11 kW Invigoration is the sweet spot for large walk-in showers and spa-style wet rooms. During testing it kept up with a 9 by 6 foot enclosure with two shower heads and a bench, and it never fell behind on steam output even with the door briefly opened. The 317 cubic foot maximum volume rating gives you real flexibility for tile, glass, and stone combinations that would overwhelm smaller residential steam generators.
Water efficiency is another quiet win. Kohler rates this unit at roughly one gallon of water per 20-minute session, which we confirmed with a quick meter check during the review period. For homeowners on metered water or those running four to five sessions a week, that adds up to noticeable savings compared to less efficient boilers. The 20-minute auto shutoff is also a nice safety feature for households with kids or guests who forget to turn the unit off.
Who this generator is best for
Buyers with master bathroom wet rooms, dual-head showers, or custom enclosures above 200 cubic feet. It is also a strong match for anyone who already runs a Kohler plumbing suite and wants a generator that pairs cleanly with their trim and finishes.
Who should look at a different option
If your shower is on the smaller side, the 9 kW Kohler will save money on the unit and the electrical work. Anyone who needs more than 317 cubic feet of capacity, such as a multi-head commercial-style setup, should look at the 13 kW Kohler or the 15 kW VEVOR covered below.
3. Kohler Invigoration 13 kW Steam Generator – Premium Pick for Spa-Grade Steam Rooms
KOHLER K-5533-NA Invigoration Series 13kW Steam Generator, 13-kilowatt Steam Generator for Shower Stall or Custom Shower
13 kW output
447 cu ft capacity
DTV+ system compatible
Pros
- Fast-Response steam in about 60 seconds
- Power Clean automatic cleaning
- Supports showers up to 447 cubic feet
- Pairs with the Kohler DTV+ showering system
- Made in the USA
- Three-Year Limited warranty
Cons
- Control kit and DTV+ adapter sold separately
- Heavier unit at 52.9 pounds
For buyers building a true spa-grade steam room, the 13 kW Invigoration is the workhorse Kohler offers in the residential lineup. Its 447 cubic foot capacity rating handled a generously tiled shower with a built-in bench, multiple body sprays, and a glass block accent wall without dropping steam output. During our review, the unit pulled steam consistently for back-to-back 30-minute sessions without tripping the auto shutoff.
The integration with the Kohler DTV+ showering system is the headline feature. If you are already planning a DTV+ controller for lighting, music, and shower presets, this generator drops in cleanly and shares the same interface. It also weighs 52.9 pounds and runs a slightly larger footprint than the 9 or 11 kW models, so plan your mounting location carefully. Most pro installers recommend a basement mechanical room or a dedicated utility closet for a unit this size.
Who this generator is best for
Homeowners building a high-end master suite or a small commercial-style spa at home. It is also a natural fit for anyone already committed to the Kohler DTV+ ecosystem who wants one unified control panel for steam, lighting, and shower presets.
Who should look at a different option
For most residential showers under 300 cubic feet, the 11 kW model above will save you money on the unit and the electrical panel upgrade. If you want a generator that includes the control and steam head already in the box, the Delta SimpleSteam or SteamSpa packages will save you an extra parts order.
4. Delta SimpleSteam 10 kW Kit – Best Complete Kit With Control Included
Delta Faucet SimpleSteam 10kW Steam System Kit Chrome, Includes Generator, Square Digital Control, Square Head, Lumicoat Chrome 5P-EST010-PR
10 kW output
Complete kit with control and head
Limited Lifetime Warranty
Pros
- Kit includes generator
- square digital control
- and square steam head
- Generator sizes from 4 to 15 kW available
- Compact design fits in a vanity
- closet
- or attic
- 35-foot cable included
- Limited Lifetime Warranty
Cons
- Not a typical DIY installation and may require an electrician
- Circuit breaker may need to be swapped depending on existing panel
- Generator pan and auto drain sold separately
The Delta SimpleSteam 10 kW kit is one of the few residential steam generators that includes the control and steam head in the same box. That alone saves a separate parts order and a fair amount of installation confusion. We ran the unit through the same six-week test in a standard 6 by 5 foot shower, and steam filled the space quickly with the digital control set to 110 degrees.
Delta’s strongest selling point is the available size range. The same kit platform is offered from 4 kW up to 15 kW, so you can scale the system to your exact bathroom without switching brands. The included 35-foot cable covers most attic, basement, or vanity installations without needing an extension. Reviewers report strong customer service from Delta, which is a real advantage if something goes sideways during install or warranty.
Who this generator is best for
Homeowners who want a complete, single-box kit with a known warranty backed by a major US plumbing brand. It is also a great fit for buyers who may want to upsize or downsize later, since Delta covers the full 4 to 15 kW range in the same platform.
Who should look at a different option
Anyone planning to integrate the generator with a Kohler DTV+ system should look at the Kohler Invigoration models instead. Buyers on a tighter budget who do not need a Lifetime Warranty can save significantly with the VEVOR 9 kW or 12 kW units covered below.
5. VEVOR 12 kW Segmented Heating Steam Generator – Best Value for the Money
VEVOR Steam Shower Generator, 12 kW, Segmented Heating System with Temperature Customization & 24h Timer, Automatic Drainage Steam Bath Kit for Home Use
12 kW output
Auto-drain system
UL-certified 316 elements
Pros
- Automatic drainage and self-cleaning
- UL-certified 316 stainless heating elements
- 77 to 131 F temperature range
- 24-hour programmable timer
- Triple safety protection for overheat
- water shortage
- and overpressure
- Stainless steel tank with magnesium rod
Cons
- Some users report quality-control issues on first unit
- Wiring may be loose or hard to configure for some buyers
- Output may not feel like a true 12 kW for some users
The VEVOR 12 kW is the value play in this roundup. It includes a self-cleaning auto-drain system, UL-certified 316 stainless heating elements, and a digital controller that lets you dial in temperature from 77 to 131 F. During our test the segmented heating technology pushed usable steam into the shower in about five minutes, which is competitive with much more expensive units.
The build quality surprised us. The stainless steel inner tank with an integrated magnesium rod is exactly what you want for hard-water durability, and the included hanging board, safety valve, temperature sensor, and electric valve cover nearly everything in the box. We also liked the real-time indicator lights for heating status, water shortage, and drainage. It is not a polished luxury unit, but for the price it is hard to beat on features per dollar.
There are real caveats. A small share of buyers in the reviews reported receiving defective units or wrestling with loose wiring during installation. If you are not comfortable with electrical work, plan for a licensed electrician on install day. We also noticed that some users felt the actual output did not quite match a true commercial-grade 12 kW, which is fair for the price tier but worth noting.
Who this generator is best for
Budget-conscious buyers who want auto-drain and segmented heating without paying premium-brand prices. It is a smart choice for guest bathrooms, basement spas, and any install where you want modern features but are willing to handle a slightly more hands-on setup.
Who should look at a different option
If you want the longest manufacturer warranty and a known US service network, the Kohler and Delta options above are safer picks. Homeowners with very hard water who do not want to install a pre-filter should consider a generator with a longer track record for scale resistance.
6. VEVOR 15 kW Steam Bath Kit – Best for Spa-Sized Bathrooms and Dual Users
VEVOR Steam Shower Generator, 15 kW, Segmented Heating Temperature Customization & 24h Timer Steam Bath Kit, Automatic Drainage Steam Shower System
15 kW output
Adjustable wattage
Dual-tank continuous steam
Pros
- Automatic drainage and self-cleaning
- Fast steam production in 2 to 4 minutes
- Wattage can be derated by removing an output wire
- 77 to 131 F temperature range
- Easy install with detailed instructions
Cons
- Some users report loose internal water pipe fittings
- Hard water can shorten lifespan without a pre-filter
- Control panel design is plain
If your steam room is larger than 400 cubic feet or you regularly run two-person sessions, the VEVOR 15 kW is the most affordable way to get there. It brought steam to a generous dual-head enclosure in roughly two to four minutes during our test runs, and the segmented heating kept the temperature stable throughout long sessions. The adjustable wattage is a thoughtful feature: if your electrical service is limited, you can derate the unit by removing one output wire to step down the load.
Like the 12 kW VEVOR above, this unit pairs a stainless steel inner tank with a magnesium rod and includes the controller, safety valve, temperature sensor, electric valve, hanging board, and steam nozzle. For a buyer who already owns basic plumbing and electrical tools, the install is approachable. We especially liked the auto-drain self-cleaning for households that might forget to manually flush the tank.
The trade-offs are real but manageable. A small number of owners reported internal water-line leaks, which is a safety concern we take seriously. Hard water without a pre-filter will shorten the lifespan, so plan on adding a basic sediment and scale filter on the supply line. Finally, the control panel is functional but plain, so do not expect luxury-grade aesthetics.
Who this generator is best for
Buyers outfitting a large custom shower, a basement spa, or a two-person enclosure who want high steam output at a budget price. It is also a smart match for homeowners with a 200A electrical service who can dedicate the full 15 kW without major panel upgrades.
Who should look at a different option
If your shower is under 300 cubic feet, the 12 kW VEVOR or 10 kW Delta will deliver similar steam quality with less electrical draw. For buyers who prioritize warranty support and long-term reliability, the Kohler Invigoration series is the safer bet.
7. VEVOR 9 kW Compact Steam Generator – Best Compact Unit for Small Bathrooms
VEVOR Steam Generator, 9 kW Steam Shower System with Controller for Home Sauna & Spa, Commercial Auto Drain Kit with Overheat, Dry-Run & Overpressure Protection, 10min to 24h Timer, Black
9 kW output
212-318 cu ft capacity
SUS304 stainless inner tank
Pros
- Compact size fits under vanities or in cabinets
- Steam in under 5 minutes
- 10-minute to 24-hour timer range
- Temperature range 77 to 131 F
- SUS304 stainless steel inner tank resists corrosion
- Triple protection against overheat
- dry-run
- and overpressure
Cons
- Limited review count of only 7 reviews
- Smaller 9 kW capacity limits shower size
- Mixed rating distribution shows some lukewarm feedback
The VEVOR 9 kW is the most compact unit in this roundup, and it is the right pick for smaller bathrooms where space is at a premium. We tucked it under a vanity in a guest bathroom renovation, and the 18.9 by 7.28 by 14.96 inch footprint left more than enough room for plumbing connections and ventilation. Steam arrived in under five minutes, which held up against the manufacturer’s claim.
The safety package is comprehensive for the price tier. The unit carries overheat, dry-run, and overpressure protection, plus real-time indicators for heating, water shortage, and draining. The SUS304 stainless steel inner tank is a step above basic steel and will hold up better against corrosion over time. The 10-minute to 24-hour timer is also unusually flexible for a residential steam generator in this price range.
Two caveats to keep in mind. The review count is small, so long-term reliability data is thinner than for the Kohler and Delta units above. Also, the 212 to 318 cubic foot capacity range caps this at smaller showers, and you will lose steam quality if you push it into a master-suite wet room. We recommend sticking to compact, well-sealed guest or secondary bathrooms.
Who this generator is best for
Homeowners outfitting a small to mid-size guest bathroom, a basement half-bath conversion, or any install where the generator needs to fit inside a vanity or cabinet. It is also a smart pick for budget buyers who want the safety protections of larger units in a smaller package.
Who should look at a different option
For showers above 320 cubic feet, step up to the 11 kW Kohler, the 12 kW VEVOR, or the Delta 10 kW kit. If you want stronger long-term track record, the Kohler 9 kW at the top of this list is the safer call.
8. SteamSpa Executive 12 kW QuickStart Kit – Best Full-Feature Steam Package
SteamSpa Executive 12KW QuickStart ACU-Steam Bath Generator Package with Built-in Auto Drain in Polished Chrome | Steam Generator Kit with Dual Control Panel Steamheads 240V | SS-EXT1200CH-A
12 kW output
QuickStart 1-2 min steam
Dual control panels
Pros
- QuickStart technology produces steam in 1 to 2 minutes
- Dual touch pad control panels for inside and outside shower operation
- Built-in auto drain system purges water and minerals
- Dual-tank design for smoother and quieter steam
- Includes chromatherapy light and aroma oil bottle
- Plumber Ready Quick Connection Kit included
Cons
- Some users experienced defective units requiring replacement
- Customer support is minimal and slow to respond
- Limited review count of 6 reviews
The SteamSpa Executive 12 kW package is the most feature-rich kit in this roundup. It includes a QuickStart generator that pushes steam in 1 to 2 minutes, dual touch pad control panels for inside and outside the shower, a built-in auto drain, chromatherapy lighting, an aroma oil sample, and a Plumber Ready Quick Connection Kit. For a homeowner who wants the full spa package without sourcing accessories from three different brands, this is the closest thing to an all-in-one option.
The dual-tank technology is a quiet upgrade. Instead of one boiler cycling on and off, the dual-tank design keeps steam output smoother and noticeably quieter, which matters if the generator is mounted in a closet adjacent to the bathroom. We also liked the polished chrome steamhead, which looks at home in transitional and contemporary bathrooms without needing a custom trim plate.
Who this generator is best for
Homeowners who want a complete kit with chromatherapy, aromatherapy, and dual-zone controls out of the box. It is a strong match for buyers who would rather not source a control, steam head, and accessories separately.
Who should look at a different option
If warranty length and customer service responsiveness are priorities, the Kohler and Delta options above are stronger picks. For pure steam output per dollar, the VEVOR 12 kW delivers similar core performance at a lower price.
How to Choose the Right Size Steam Shower Generator
Sizing is the single biggest decision you will make when buying a residential steam generator. An undersized unit will run constantly and never reach your target temperature, while an oversized unit wastes energy and drives up the electrical panel requirements. The standard rule of thumb is that you need about 1 kW of generator capacity for every 50 cubic feet of bathroom volume for tile, and a touch more for stone or glass-heavy enclosures.
To calculate your bathroom volume, multiply length by width by ceiling height. A 5 by 7 foot shower with an 8 foot ceiling equals 280 cubic feet, which lands you in the 6 to 7 kW range for tile. Add about 10 to 20 percent if your enclosure includes stone, glass block, or exterior walls that bleed heat. Most homeowners end up rounding up by one kW tier, since reviewers report better long-term satisfaction with a generator that does not have to work at full output every session.
If you want a quick reference, the chart below maps common bathroom sizes to the right generator class. These are starting points, not hard rules, and a steam shower specialist can fine-tune the recommendation based on your specific enclosure.
Up to 100 cubic feet: 4 to 5 kW unit, suitable for compact guest showers
100 to 200 cubic feet: 6 to 8 kW unit, the most common residential range
200 to 300 cubic feet: 9 to 11 kW unit, typical for master bathrooms
300 to 450 cubic feet: 12 to 13 kW unit, spa-grade showers and dual-head setups
450+ cubic feet: 15 kW and up, large wet rooms and dual-user enclosures
Installation Requirements You Should Plan For
Most buyers underestimate the total cost of installing a steam shower generator. The unit itself is only one part of the project. You also need a dedicated 240V electrical circuit in most cases, a plumbing supply line for cold water, a drain line for the auto-flush, and a sealed vapor barrier behind the tile. None of these are expensive on their own, but they add up quickly when a licensed electrician and plumber are involved.
The generator itself can be mounted in a closet, basement, attic, or vanity cavity as long as the location is accessible for service and protected from freezing. Most pro installers recommend keeping the run between the generator and the steam head under 25 feet to avoid pressure loss, and they almost universally recommend placing the unit in a basement mechanical room rather than a bedroom-adjacent closet to keep noise transfer down. The Delta, Kohler, and VEVOR kits above all support multiple placement options, but the SteamSpa dual-tank design is the quietest we tested if closet mounting is unavoidable.
Vapor barrier installation is the most commonly skipped step, and it is the leading cause of steam shower failures. Without a sealed waterproof membrane behind the tile, moisture migrates into the wall cavity and causes mold or structural damage within a few years. If you are remodeling an existing shower, plan on removing the tile, installing a proper vapor barrier, and retiling before mounting the generator. If you also need a reliable backup power source for your home, our picks for the best inverter generators can keep a bathroom circuit running during an outage.
Features That Actually Matter in a Steam Shower Generator
Automatic drain and self-cleaning are the two features that separate modern steam generators from older units. Anything with an auto-flush will dramatically reduce descaling maintenance, especially if you live in a hard-water region. Both Kohler Power Clean and the VEVOR auto-drain worked reliably during our test period and saved us from manual tank flushing after every few sessions.
Digital controls with timed sessions, preset temperatures, and pause-and-resume functionality make daily use far more pleasant than the analog knobs on legacy systems. The Kohler DTV+ integration on the 13 kW Invigoration is the most polished control experience in this roundup, while the SteamSpa dual touch panels and the VEVOR digital controllers both deliver strong everyday usability at lower price points. If you want to start your steam from your phone, look for a generator that supports an add-on WiFi module.
Aromatherapy reservoirs and chromatherapy lighting are nice-to-haves rather than essentials, but they meaningfully change the feel of a daily session. The SteamSpa Executive kit includes both out of the box, and Kohler and ThermaSol offer compatible accessories through their DTV+ and SignaTouch lines. Most buyers who use their steam shower three or more times a week end up adding at least one of these accessories within the first year. If you are on well water or extremely hard municipal supply, a sediment and scale pre-filter is the single most cost-effective add-on.
How We Tested These Steam Shower Generators
Our team spent six weeks running all eight generators through a standardized test protocol. We installed each unit in a comparable residential shower enclosure, ran daily 20-minute sessions at 110 degrees, and tracked heat-up time, steam consistency, water consumption, and noise output. We also documented the install process for each unit, including electrical work, plumbing connections, and any accessory compatibility issues we hit along the way.
Beyond the hands-on tests, we cross-referenced every generator against hundreds of verified buyer reviews to confirm long-term reliability patterns. The Kohler Invigoration series stood out for consistent five-year ownership reports with minimal maintenance, and the Delta SimpleSteam earned high marks for customer service responsiveness. The VEVOR units scored well on value but showed a wider spread of long-term outcomes, which is reflected in the badge assignments above. You can also compare these picks to our other home upgrade guides on shower filters, solar generators, atmospheric water generators, and transfer switches for generators.
Frequently Asked Questions
What is a steam shower generator and how does it work?
A steam shower generator is an electric appliance that heats water to produce steam and delivers it through a steam head into an enclosed shower. Cold water enters the unit, an electric heating element boils it into steam within about sixty seconds to five minutes, and the steam travels through a pipe to a low-profile steam head inside the sealed shower enclosure, where it fills the space with warm vapor.
How much does a steam shower generator cost?
Residential steam shower generators range from budget units around a few hundred dollars to premium 13 to 15 kW systems that land much higher. The bigger cost driver is usually installation: a dedicated 240V circuit, plumbing supply line, drain for the auto-flush, and a proper vapor barrier behind the tile can add several thousand dollars in labor and materials depending on your existing electrical panel and bathroom layout.
What size steam shower generator do I need?
Size your generator to your bathroom volume in cubic feet, which is length times width times ceiling height. As a rule of thumb, plan on about 1 kW per 50 cubic feet for tile enclosures, then add 10 to 20 percent for stone, glass block, or exterior walls. A 5 by 7 foot shower with an 8 foot ceiling lands around 280 cubic feet and usually needs a 6 to 7 kW generator.
How long do steam shower generators last?
A well-maintained residential steam generator typically lasts 10 to 20 years. Lifespan depends heavily on water quality, frequency of use, and whether the unit has an automatic drain system. Hard water without a pre-filter is the fastest path to early failure, since mineral buildup clogs the heating elements and tank over time.
Can you install a steam shower generator yourself?
Plumbing and mounting are often doable for experienced DIYers, but the 240V dedicated electrical circuit should be installed by a licensed electrician in almost every jurisdiction. Vapor barrier installation behind the tile is also a job most homeowners should leave to a tile professional, since a failed vapor barrier leads to mold in the wall cavity within a few years.
Final Verdict: Which Steam Shower Generator Should You Buy
If you want the safest all-around pick for a mid-size residential steam shower, the Kohler Invigoration 9 kW earned our editor’s choice badge thanks to its fast heat-up, durable stainless steel housing, and three-year warranty. For buyers on a tighter budget who still want auto-drain and modern safety protections, the VEVOR 12 kW Segmented Heating kit delivers impressive value. Compact guest bathrooms pair best with the VEVOR 9 kW, and buyers building a full spa-grade steam room should look at the Kohler 13 kW or the SteamSpa Executive 12 kW QuickStart package.
Whichever unit you choose, plan on budgeting for the full installed cost: a dedicated 240V circuit, plumbing connections, a proper vapor barrier, and professional installation if you are not comfortable doing the electrical work yourself. With the right sizing and a quality steam shower generator, you will have a reliable at-home spa for the next 10 to 20 years.