SteamSpa OATS450MB-A Oasis 4.5 kW Steam Package with Touch Control and Matte Black Square Steamhead and AutoDrain

The SteamSpa OATS450MB-A is a 4.5 kW Oasis Series steam generator package with a touch control panel with programmable memory, plus a matte black square steamhead and AutoDrain. This SteamSpa 4.5 kW steam shower generator turns a sealed shower enclosure of up to about 63 ft³ into a home steam room, and it suits a homeowner who wants square steamhead styling to match a modern shower and a simple touch panel.

A session starts at the touch panel on the shower wall: turn on the water supply valve and the breaker, press power, and the generator fills and heats its tank; SteamSpa's QuickStart technology brings steam in as little as 1 to 2 minutes. Set the steam time anywhere from 1 to 60 minutes, save two favorite time and temperature combinations as SET1 and SET2, and recall them with one press. The panel also keeps a real-time clock and switches between °F and °C. The room temperature climbs as the steam comes in, and when it reaches your setting the steam stops, while the dual-tank design keeps the output continuous until then.

Sized for a Compact 63 ft³ Steam Shower

SteamSpa's sizing chart starts with a 3' x 3' x 7' cabin of 63 ft³ and lists it for the 4 kW to 6 kW class, which is where this 4.5 kW generator sits. SteamSpa adds that it is safe, and even recommended, to choose one size step above what the chart shows. At 4.5 kW the generator suits a compact steam shower or a small walk-in shower stall, and because the steam is produced outside the enclosure, the shower itself only needs its steamhead, a control and a properly sealed enclosure.

Square Aroma Steamhead

Steam enters the shower through a matte black square steamhead in solid steel with a built-in aroma reservoir. A few drops of essential oil in the reservoir are gently warmed by the passing steam, so the scent spreads through the room with the vapor. The package includes a selection of aroma oil bottles to start with, and a safety relief valve rounds out the kit.

Teflon Elements, Steel Steamhead, Relief Valve and AutoDrain

The heating elements are Teflon coated, which SteamSpa says resists scale and corrosion and outlasts traditional brass elements. On this -A model, AutoDrain opens 30 minutes after the steam shuts off and drains the tank for about 7 minutes, which limits mineral buildup between uses. The generator measures 15.55" W x 5.59" D x 11.89" H and holds 80 in³ of water, building steam at 3 psi, and a pressure relief valve 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. At 4.5 kW the generator draws 19A at 240V single phase on 12 AWG copper wire, with its own breaker and a power disconnect within sight of the unit, and it can sit in a closet behind the shower, a vanity cabinet, the attic or the basement, as long as it stays indoors, dry, protected from freezing and less than 25' from the steam room.

With up to about 63 ft³ of steam room in reach and a matte black square steamhead in the shower, the SteamSpa OATS450MB-A gives you a complete 4.5 kW steam shower package from one brand, ready for a licensed electrician and plumber to install.

Features

4.5 kW for Rooms up to 63 ft³
SteamSpa's sizing chart matches 4.5 kW to a compact steam shower or a small walk-in shower stall of up to about 63 ft³, so the generator is matched to the room's volume; SteamSpa says choosing one size up is safe and even recommended.

Touch Panel With Memory
The touch panel sets the steam time from 1 to 60 minutes and saves two favorite settings as SET1 and SET2, so each session starts with one press.

QuickStart Steam
SteamSpa's QuickStart technology brings steam in as little as 1 to 2 minutes, and the dual-tank design keeps it flowing continuously, so a session starts with little waiting.

Matte Black Square Steamhead
Steam enters through a matte black square steamhead in solid steel with a built-in aroma reservoir; tighten it by hand, mount it about 12" above the floor with the outlet pointing down, away from the bench.

AutoDrain Included
On this -A model, AutoDrain empties the generator tank on its own after each session, which limits mineral buildup and saves you a maintenance step.

Teflon Heating Elements
Teflon-coated elements resist scale and corrosion and, as SteamSpa rates them, withstand high heat far longer than traditional brass elements, so the generator keeps its output.

Automatic Pressure Relief
A pressure relief valve comes in the package and opens automatically when tank pressure passes 15 psi, an added layer of protection for the generator and the home.

Standard 19A, 240V Circuit
At 4.5 kW the generator runs on a dedicated 19A, 240V single-phase circuit with 12 AWG copper wire, its own breaker and a power disconnect within sight of the unit.

Simple Setup and Low Maintenance
SteamSpa describes the Oasis square package as engineered for easy installation and low-maintenance use: one generator, one touch panel and the steamhead, connected with standard copper or brass plumbing.

Specifications

• Model: OATS450MB-A
• Power: 4.5 kW
• Electrical: 240V single phase, 19A, 12 AWG wire, dedicated breaker
• Recommended Room Size: up to 63 ft³ (SteamSpa sizing chart)
• Steam Outlets: 1
• Steam Pressure: 3 psi
• Tank Water Volume: 80 in³
• Steam Time: 1 to 60 minutes
• Water Supply: 1/2" copper or brass, hot or cold, 15 to 20 psi
• Steam Line: 3/4" copper or brass, no valves
• Drain Line: 1/2", gravity drain
• Pressure Relief Valve: 3/4", opens above 15 psi
• Inlet Water Temperature: 160°F maximum
• Steamhead Finish: Matte Black
• Steamheads: 1 square
• Control: Touch control panel with programmable memory settings
• AutoDrain: Included
• Generator Dimensions: 15.55" W x 5.59" D x 11.89" H (with fittings)
• Steam-Up Time: About 1 to 2 minutes
• Heating Elements: Teflon-coated
• Generator Location: Indoors only, outside the steam room
• Installation: Licensed electrician and plumber; inline water filter required
• Warranty: Generator: limited lifetime; controls and accessories: 1 year

What's Included

• Oasis Series 4.5 kW steam generator with integrated AutoDrain
• Touch control panel
• Solid steel square steamhead with aroma reservoir, matte black
• Safety relief valve
• Aroma oil bottles

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: 4.5 kW at 240V single phase draws 19A; run 12 AWG insulated copper wire rated 194°F and 300V on its own breaker, with a power disconnect within sight of the generator and a proper ground. 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 steamhead 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 steamhead with soapy water and a soft sponge, never with harsh chemicals or abrasive tools. 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

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 Oasis Series square touch packages pair a SteamSpa generator from 4.5 kW to 12 kW with a touch control panel and square aroma steamheads in matte black, gold, brushed nickel, polished chrome or oil rubbed bronze; the 10.5 kW and 12 kW sizes carry two steamheads, and every size comes with or without AutoDrain (the -A models add it). The SSD-STMKIT installation kit, SS-EOIL6P-XX aroma oils, G-CLIGHT chromotherapy light and G-DPAN drain pan are sold separately.