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Availability: In stock

Regular Price: $8,700.00

Special Price: $6,960.00

Quick Overview

Steam Boiler For Steam Rooms up to 1250 Cubic Feet

20"L x 20"W x 38"H

Includes Stainless Steel Jacket

Also Available in 480v/3p & 600v/3p

Mr. Steam Commercial Steam Boiler

Perfect For Use in Steam Rooms in Operation for More than Six (6) Hours Daily.

High Limit Room Temperature Cut-Out Included.


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Regular Price: $8,700.00

Special Price: $6,960.00


Commercial CU Generators

imageCU Generators: Quality. Reliable. Practical.

Mr.  Steam CU Series Commercial Generators meet rigid requirements and nationally recognized testing standards, including UL. ASME steam pressure vessels are built to the ASME Boiler and Pressure Vessel Code requirements and are National Board Registered.

  • High quality fibrous glass pressure vessel insulation delivers maximum energy performance.
  • Stainless steel heating elements are corrosion-resistant.
  • ASME-grade flanges support longevity and reliable performance.
  • Vertical construction means a smaller footprint, which means the generator can be located within the tightest of mechanical rooms.
  • The integrated base means there is no need to construct a stand - saving you on extra costs.
  • An Integral pressure gauge and sight glass provides operating information at a glance.
  • Standard full port drain valve enables maximum draining of the pressure vessel.
  • Comes equipped with a hinged access door for ease of installation and service.
  • Optional Automatic Blowdown System features electronically controlled maintenance and 24-hour/7-day programming.
  • Backed by Mr. Steam's limited warranty for commercial steam bath generators.
  • US and Canada UL listed.

Digital 1 Control Packages

imageEfficient, consistent spa temperature control

Designed and packaged to provide spa operators with the ability to select the steam room operating temperature. Simply determine the CU model for the steam room being serviced and select the required Digital 1 Control system.

The Digital 1 Control Package includes:

  • Digital 1 Temperature Control featuring in-steam-room temperature-regulating sensor
  • Advanced low mass, quick-response thermostat with sensor guard
  • Capability and durability to respond to steam room temperature within tight tolerances
  • Electronic temperature control factory pre-installed with panel-mount design
  • Plate for optional remote installation in a standard 4x4 electrical box
  • Ability to set room temperature accurately and reliably
  • Efficient, consistent control with full 100˚ F - 120˚ F range
  • Integrated in-steam-room high temperature control
  • An additional level of reliability


  • If more than one room is being serviced by one (1) CU generator, the appropriate CU1-digital 1 or CU2-digital 1 Control Package must be specified for EACH room
  • See Page 23 for sizing and selection guidelines for CU generators
  • Note all “IMPORTANT” guidelines on page 23 when one (1) CU generator is servicing more than one (1) room

Operating Equipment

Reliable, Efficient, Value-Added

Everything the spa operator needs to save time, ease maintenance, and enhance the spa experience.

Automatic Blowdown System

Mr. Steam's Automatic Blowdown System saves time, energy and payroll dollars because it starts, stops, drains and refills each CU commercial steam generator automatically — on a pre-scheduled daily basis.

  • Round-the-clock dependability with low maintenance for Clean Steam...Every Time®
  • Comes standard with a 24-hour, seven-day digital time clock
  • Effectively discharges accumulated sediment at programmed intervals at low pressure blowdown
  • Can be programmed with up to 15 different On/Off times for full seven-day control with maximum cost effectiveness and minimum worries
  • US and Canada UL listed

AromaFlo® Aroma Oil Delivery System

The Mr.Steam AromaFlo® Aroma Oil Delivery System infuses aroma into the steam room for automatic integration of aromatherapy to enhance the steam bathing experience.

  • Engineered to deliver optimum, metered amounts of aromatic oil.
  • Adjustable metering and time-sequencing control permits precise delivery of essential oil and minimizes oil usage.
  • Built-in electronic controller has quiet metering pump, hoses, fittings and atomizer.
  • Mr. Steam®  Eucalyptus and Lavender oils are organic, non-hazardous, water-based oils, available in 2.6-gallon (10- liter) bottles that are specially blended for use with the AromaFlo system. Note: these oils are not for use with acrylic or fiberglass rooms.

imageASME Code Blowdown Tank

ASME Code Blowdown Tank  is essential equipment for automatic blowdown maintenance where building codes require maximum 140° F discharge.

  • Blowdown separators are built to ASME section VIII. The separators reduce the temperature and pressure to insure a safe discharge of water and sludge.
  • Designed to utilize a water seal at the outlet, reducing outlet temperature to a safe discharge level.
  • No electrical hookup required.
  • Complete with temperature gauge, pressure gauge, and gauge glass assembly.
  • ASME Code UM vessel.

Enhance the spa experience

Mr. Steam commercial accessories make the spa experience that much more enjoyable for your guests.


CU Light

Mr. Steam offers a robust, surface-mounted architectural light for commercial steam baths.

  • Energy Star rated, the CU Light operates on a compact fluorescent bulb
  • Satisfies ADA safety requirements
  • US and Canada UL listed for wet environments
  • 8.5”in diameter x 4” height

CU Speakers

Bring the sound of music to your commercial steam shower with Mr. Steam CU speakers.

  • Designed for use inside the shower enclosure
  • Complete with two 8 ½”-diameter flush mount two-way speakers
  • Polypropylene cones, and ABS frames with powder-coated grills
  • Suitable for most sources of audio input
  • Rated 80 W peak power with full range sound
  • 40 watts RMS and 8 ohms impedance

CU Alarm

Guests are assured of a completely safe steam experience with an audible alarm that sounds if the steam room maximum set temperature is exceeded

  • Suitable for use with Digital 1® control
  • Choose from multiple alarm sounds
  • Mounting in a standard 4x4 electrical box for installation
  • US and Canada UL listed for general signaling, indoors and outdoors

IMPORTANT: CU Alarm not for installation inside the steam room  
NOTE: Pressing the CU Steam Stop will cause the alarm to sound

CU Steam Stop®

Mr. Steam commercial steam showers are available with an emergency stop switch to electronically shut down the steam generator

  • Multiple Steam Stop switches can be used with one steam generator
  • Water-resistant, IP-69K rating suitable for use inside or outside the steam room 

CU AromaSteam™ Steamhead

  • Commercial AromaSteam steamheads have solid brass construction with a polished chrome finish
  • Quiet, controlled steam delivery supplied through the full ¾” NPT size steamheads with full-coverage polycarbonate cover
  • Mr. Steam engineers commercial steamheads to operate seamlessly with Mr.Steam’s AromaFlo® aromatic oil delivery system

Digital Timer

Mr. Steam offers both digital and mechanical timers so guests can safely time their steam sessions up to 30 minutes

  • The 30-minute Digital Timer and Mechanical Timers are installed outside the steam room and must be used with steam vent.
  • US and Canada UL listed

Mechanical Timer

Mr. Steam offers both digital and mechanical timers so guests can safely time their steam sessions up to 30 minutes

  • The 30-minute Digital Timer and Mechanical Timers are installed outside the steam room and must be used with steam vent.
  • US and Canada UL listed


Auxiliary Manual Reset Low Water Cutoff

Many states (including GA, IA, MA, NC, TX, WA) and local jurisdictions require an independent, manual reset, second low-water cutoff control as standard equipment.


Transformer 1/4 KVA

Provides control circuit voltage where 120V is inaccessible or costly to provide. cULus Listed

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