The SteamSpa BKT1800MK-A is a 18 kW Black Series steam generator package with a wall-mounted touchscreen with WiFi app control, plus matte black steamheads. This SteamSpa 18 kW steam shower generator turns a sealed shower enclosure of about 350 to 460 ft³ into a home steam room, and it suits a smart-home bathroom where you want to start the steam from your phone, play music and set the lights from one screen.
Everything runs from the wall-mounted touchscreen: tap steam on, and the generator fills and heats its tank, then sends steam into the shower. SteamSpa's QuickStart technology brings steam in about 1 to 2 minutes. The room temperature is set with a slide on the screen, an ECO mode caps the room at 122°F, and user presets save each person's time and temperature. A weekly working mode lets you pick the days and start time so the room is warming before you arrive, a real-time clock shows in standby, and a four-digit safety lock keeps the panel locked until the code is entered. The same functions are available from the SteamSpa app over WiFi.
Sized for 350 to 460 ft³ Steam Rooms
SteamSpa's dual-generator sizing chart lists 18 kW total for a 6' x 10' x 7' cabin and a range of 350 to 460 ft³, and it notes that it is safe, and even recommended, to choose one size step above the chart. Beyond 12 kW, SteamSpa splits the load across two generator units, so this 18 kW package can steam a large multi-person steam room, with each unit on its own dedicated 240V line. If the generator will sit more than 10' to 15' from the steam room, SteamSpa recommends going 1 to 2 kW higher to keep the steam flow up.
Bluetooth Audio and Chroma Lighting
Sound and light are part of the package: two waterproof stereo speakers play music, podcasts or audiobooks from your phone over Bluetooth, and two chromatherapy lights and a white LED ceiling light set the mood or simply light the room. Steam enters the shower through matte black steamheads.
Relief Valve and AutoDrain
The built-in AutoDrain opens once the timer has ended, or the system has been switched off, and stayed off for 2 hours, then empties the tank so minerals do not sit in standing water. The package pairs two generator units, which share the load of the steam room, and the generator body carries its own safety valve, while the 3/4" pressure relief valve in the steam system opens automatically if the tank pressure ever passes 15 psi. The generator has a hanging groove for wall mounting and must be installed level, so its water level sensor reads correctly.
Power, Plumbing and Placement
Plan the power and plumbing before the walls close. Each of the two generator units needs its own dedicated 240V line and auxiliary breaker, and SteamSpa recommends closely matched units with the highest kW unit as the primary, each with its own automatic drain. The units can sit side by side with 15" between them or stacked with 6" between them, in a closet behind the shower, the attic or the basement, indoors and protected from freezing.
With about 350 to 460 ft³ of steam room in reach and matte black steamheads in the shower, the SteamSpa BKT1800MK-A gives you a complete 18 kW steam shower package from one brand, ready for a licensed electrician and plumber to install.
Features
18 kW for 350 to 460 ft³
SteamSpa's sizing chart matches 18 kW to a large multi-person steam room of about 350 to 460 ft³, so the generator is matched to the room's volume; SteamSpa says choosing one size up is safe and even recommended.
Touchscreen and WiFi App Control
The wall-mounted touchscreen and the SteamSpa app run steam, light, music and presets, with an ECO mode that caps the room at 122°F and a four-digit safety lock.
QuickStart Steam
SteamSpa's QuickStart technology brings steam in about 1 to 2 minutes, and the dual-tank design keeps it flowing continuously, so a session starts with little waiting.
Matte Black Steamheads
Steam enters through matte black steamheads; tighten them by hand and mount them about 12" above the floor with the outlets pointing down, away from the bench.
Built-In AutoDrain
The generator empties its tank automatically after each session, so minerals do not settle in standing water and the heating elements stay cleaner for longer.
Safety Valve and Pressure Relief
The generator body carries its own safety valve, and the 3/4" pressure relief valve the manual calls for opens automatically when tank pressure passes 15 psi.
Bluetooth Audio
Pair your phone over Bluetooth and play music, podcasts or audiobooks through two waterproof stereo speakers, which SteamSpa makes waterproof for humid rooms.
Chroma and LED Lighting
Two chromatherapy lights and a white LED ceiling light give you soft mood color during a session and clear white light when you need it.
Two Units, Two Circuits
The 18 kW total is shared by two generator units, each on its own dedicated 240V line and breaker, so no single circuit has to carry the whole load.
Six Memory Profiles and a Daily Timer
Save up to six custom time and temperature settings, one for each person in the house, and use the timer so the steam room is warming up before you walk in.
Specifications
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Model: BKT1800MK-A
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Power: 18 kW
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Generator Units: 2
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Recommended Room Size: 350 to 460 ft³ (SteamSpa dual-generator sizing chart)
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Water Supply: 1/2" copper or brass, hot or cold, 15 to 20 psi
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Steam Line: 3/4" copper or brass, no valves
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Drain Line: 1/2", gravity drain
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Pressure Relief Valve: 3/4", opens above 15 psi
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Inlet Water Temperature: 160°F maximum
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Steamhead Finish: Matte Black
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Control: Wall-mounted touchscreen panel, WiFi app control, six memory profiles, daily timer
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AutoDrain: Included
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Audio: Bluetooth, two waterproof stereo speakers
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Lighting: Two chromatherapy lights, white LED ceiling light
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Steam-Up Time: About 1 to 2 minutes (manual)
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Generator Location: Indoors only, outside the steam room
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Installation: Licensed electrician and plumber; inline water filter required
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Warranty: Generator: limited lifetime; controls and accessories: 1 year
What's Included
- Two Black Series steam generator units (18 kW total), each with built-in AutoDrain
- Touchscreen control panel
- WiFi receiver
- Steamheads, matte black
- Two waterproof stereo speakers
- Two chromatherapy lights
- White LED ceiling light
- Drain pan
- Aroma oil
Sold separately: Inline water filter (required by SteamSpa), Pressure reducing valve and quick connect and release fittings (SteamSpa SSD-STMKIT installation kit), 3/4" steam pipe, 1/2" water supply and drain piping, 240V wiring and breaker
Installation & Care
Installation
Electrical: each of the two generator units needs its own dedicated 240V line and auxiliary breaker, with a power disconnect within sight and a proper ground; SteamSpa's single-unit table runs from 19A at 4.5 kW to 50A at 12 kW, so size each circuit to the unit it feeds. Plumbing: a 1/2" hot or cold supply at 15 to 20 psi through a pressure reducing valve, the inline filter and a quick connect and release fitting, in copper or brass only (no PEX or PVC), with inlet water no hotter than 160°F. Run 3/4" copper or brass steam pipe with curved elbows, sloped so condensation drains back, with no valves and no dips, insulated where it can be touched, and keep it off any wall material not rated to 240°F. Mount the steamheads about 12" above the floor, outlet down and away from any bench, keep the temperature sensor or control off the steamhead wall, seal every pipe and fitting with 100% silicone caulk, and add an exhaust fan outside the steam room. Leave 12" of clearance on both sides and the top of the generator. SteamSpa requires a licensed electrician and a licensed plumber, and the installation manual is in Resources.
Care
Let the AutoDrain finish before you switch off the breaker, so the tank is empty. Replace the inline filter cartridge at least every 6 months, clean the water supply pipes once a year, and have the generator, steamhead, pipes and fittings checked for leaks every year. About every six months, a technician can remove the cover and clean scale off the water level sensor prong. Wipe the steamheads with soapy water and a soft sponge, never with harsh chemicals or abrasive tools, and keep the touchscreen glass free of hard objects; wipe off mist for a clean touch. Children under 16 should not use the steam room, and because SteamSpa generators are not boilers, check with your local inspector before any commercial use.
Resources
Shipping, Returns & Warranty
SteamSpa ships this item from the SW Corp warehouse by UPS, FedEx or USPS, usually within 1 to 2 business days of your order. Shipping is free within the lower 48 states on orders of $101 or more (orders under $101 ship for a flat $15); for Alaska or Hawaii, contact us before you order. You'll get tracking by email as soon as it ships.
Inspect the packaging and the product before you sign. Note any damage or shortage on the delivery receipt, then email photos to support@mycleansupplies.com within 48 hours of delivery so the freight claim can be filed. Damage reported after 48 hours can't be claimed.
Unused SteamSpa products in their original packaging can be returned within 21 days of delivery. Ask us for a return authorization before you ship. You pay the return shipping, which for a freight item means the freight cost, and a 20% restocking fee is deducted along with payment processing fees. Installed, used or damaged products and special-order items can't be returned.
SteamSpa warrants the steam generator against defects in materials and workmanship for its lifetime and repairs or replaces it at its option; the controls, steamhead and other accessories are covered for one year from purchase. Register the generator at steamspa.com/register within 90 days of delivery. The warranty requires installation by a licensed professional, an inline water filter whose cartridge is replaced at least every 6 months, and a quick connect and release fitting for maintenance. It covers residential use only, and surface damage must be reported within 5 days of delivery.
Warranty claims. Call SteamSpa at 1-866-588-8008 or email info@steamspa.com with your proof of purchase and the model number. Register the generator at steamspa.com/register within 90 days of delivery, or the warranty is not active. Contact us with your order number if you would like help with the claim.
About SteamSpa
SteamSpa makes residential steam shower generators, wireless and touch controls, steamheads and steam room accessories. It is part of SW Corp in Miami, Florida, the company behind ANZZI and MediTub.
The Black Series packages pair a SteamSpa generator from 4.5 kW to 24 kW with a touchscreen or wireless control, WiFi app control, Bluetooth audio and chromatherapy lighting, with steamheads in matte black, gold, brushed nickel, polished chrome or oil rubbed bronze. The 10.5 kW and 12 kW generators have two steam outlets for two steamheads, and the 15 kW to 24 kW sizes use two generator units. The BKT-ADP Deluxe adds a dual aroma pump, and the BKTS packages use square steamheads; the SSD-STMKIT installation kit is sold separately.
