AI Series 18kW Commercial Steam Room Generator | Amerec AI-18

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The Amerec AI-18 commercial steam shower generator is engineered for the most demanding commercial health club steam rooms with dimensions up to 900 cubic feet (CF). The Amerec AI-series boilers include two 3/4" NPT steam heads. Required control sold separately.

This 18-kilowatt electric steam room boiler is suitable for one or two large steam baths with dimensions measuring between 550 to 900 adjusted cubic feet (ACF).

The high-performance Amerec AI-18 generator is constructed of corrosion-resistant steel for years of reliable and efficient operation. The unit comes with an ASME-certified pressure vessel for instant steam operation, durable electronic components, electronic high-limit pressure control systems, water level sight glass, 3-level water sensing system with low water cutoff, and a variety of other features.

Health clubs, hotels, resorts, and other commercial sites trust the dependable AI-18 steam generator for ease of use and hands-off, automated operation. The Amerec AI-18 includes multiple safety features which help minimize service costs and crucial downtime.

The AI-18 commercial steam boiler is UL and cUL listed and complies with ASME requirements to ensure safety and quality. All AI Series units are delivered pre-assembled and ready to install.

The Amerec AI-18 is available in 208V single-phase (9006-180), 240V single-phase (9006-181), 208V three-phase (9006-183), 240V three-phase (9006-184), and 480V three-phase (9006-186) configurations.

The AI-18 requires the use of a control for operation. Controls allow facility operators to adjust features such as temperature and duration. Select the available control with features that best suit your needs.

We recommend the addition of the ADI Automatic Drain System with the purchase of your AI-18 unit. The ADI Automatic Drain System performs daily draining of the boiler tank to reduce sludge and scale build-up.


  • Pressurized vessel for instant steam
  • Durable electronic components
  • Low water cut-off with manual reset pre-installed
  • 3/4” drain port
  • Room high limit temperature safety system
  • Operating, electronic high limit pressure control systems
  • Sight glass
  • Optional D24/7 digital time clock can be used for both generator on/off settings and ADI-D Autodrain system
  • Alarm circuit panic button
  • ASME safety valve
  • ASME certified low-pressure operation vessel


  • AI-18 steam boiler
  • Two 3/4” NPT steam heads
  • Installation and operation manual
  • Limited warranty



Model AI-18
Shipping Weight 225 lbs
Minimum Adjusted Cubic Feet 550
Maximum Adjusted Cubic Feet 900
Kilowatt Rating 18 KW
Electrical Specifications Electrical Chart
Water Supply Connection 1/2" NPT
Generator Steam Line Connection 3/4" NPT
Steam Head Connection 3/4" NPT
Drain Connection 3/4" NPT
Safety Relief Valve Connection 3/4" NPT
Safety Relief Valve 15 PSIG
Control "Rough In" Cut Out 2-1/8" x 3-1/4"
Control Sensor Cable 25', 2 Conductor, 22 AWG, Shielded Cable
Control Sensor "Rough In" Cut Out 7/8" Diameter
Generator Control Connection 3 Position Terminal Block
Generator Control Cable 25', 3 Conductor, 22 AWG, Shielded Cable
Width 17-1/2"
Depth 20-3/4"
Height 23-1/4"