Mr. Steam Generators Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator
Mr. Steam Generators Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator
Mr. Steam Generators Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator
  • 20kW Steam bath generator, 27-5/8" x 20-3/4" x 7-7/8"            
  • Installation and operation manual
  • Limited warranty
Model MS MX4E
Minimum Adjusted Cubic Feet 483
Maximum Adjusted Cubic Feet 678
Shipping Weight (Lbs.) 67 lbs
Kilowatt Rating (KW) 20 KW
Electrical Specifications (Refer to Installation Manual)
Water Supply Connection 3/8" NPT
Generator Steam Line Connection 3/4" NPT
Steam Head Connection 1/2" NPT
Drain Connection 1" NPT
Safety Relief Valve Connection 3/4" NPT
Safety Relief Valve PSIG 15 PSIG
Control "Rough In" Cut Out 1"
Generator Control Connection 8-Pin Mini-DIN Connector
Generator Control Cable 30', 8 Conductor, 24 AWG, Shielded Cable
Width 27-5/8"
Depth 7-7/8"
Height 20-3/4"
  • For steam baths sized from 483 to 678 adjusted cubic feet
  • Available in 240V and 208V operation
  • Stainless Steel tank
  • Industrial-grade, serviceable heating element
  • MiniDIN control connections
  • Available Auto Drain automatic draining system
  • Durable electronic components
  • Electronic water-level control system
  • Low-voltage safety control circuits
  • Solid-state circuitry
  • Diagnostic LED Displays
  • Full port drain valve
  • ASME safety valve
  • UL/CUL/NOM/CE Listed

The Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator is a high-capacity steam shower generator designed for large residential steam baths sized from 483 to 678 adjusted cubic feet. Built with a stainless steel tank, industrial-grade serviceable heating element, electronic water-level control, diagnostic LED displays, and low-voltage safety circuits, it gives homeowners a durable steam solution for larger custom shower environments.

Best Uses for Mr. Steam MX4 MS MAX Series 20kW:

  • Best for homeowners building a large steam shower that requires a generator rated for 483 to 678 adjusted cubic feet.
  • Ideal for custom bathroom projects that need a 20kW steam generator available in 240V or 208V operation.
  • Best for shoppers who want a stainless steel tank, industrial-grade heating element, and durable electronic components for long-term use.
  • Well suited for larger home wellness spaces where consistent steam production and electronic water-level control are important.
  • Great for buyers who want installation-ready safety features such as low-voltage control circuits, an ASME safety valve, and UL/CUL/NOM/CE listings.
  • A strong fit for users who value service-friendly features like MiniDIN control connections, diagnostic LED displays, a full port drain valve, and optional Auto Drain.

Yes, we really do offer FREE shipping! We will send your order at no additional cost to anywhere in the lower 48 states in the US. If you have questions about shipping to Alaska or Hawaii, please contact us through our live chat to discuss a custom freight quote.

Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator

$5,093.00 $7,275.00
You Save $2,182.00 (30% Off)

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  • 20kW Steam bath generator, 27-5/8" x 20-3/4" x 7-7/8"            
  • Installation and operation manual
  • Limited warranty
Model MS MX4E
Minimum Adjusted Cubic Feet 483
Maximum Adjusted Cubic Feet 678
Shipping Weight (Lbs.) 67 lbs
Kilowatt Rating (KW) 20 KW
Electrical Specifications (Refer to Installation Manual)
Water Supply Connection 3/8" NPT
Generator Steam Line Connection 3/4" NPT
Steam Head Connection 1/2" NPT
Drain Connection 1" NPT
Safety Relief Valve Connection 3/4" NPT
Safety Relief Valve PSIG 15 PSIG
Control "Rough In" Cut Out 1"
Generator Control Connection 8-Pin Mini-DIN Connector
Generator Control Cable 30', 8 Conductor, 24 AWG, Shielded Cable
Width 27-5/8"
Depth 7-7/8"
Height 20-3/4"
  • For steam baths sized from 483 to 678 adjusted cubic feet
  • Available in 240V and 208V operation
  • Stainless Steel tank
  • Industrial-grade, serviceable heating element
  • MiniDIN control connections
  • Available Auto Drain automatic draining system
  • Durable electronic components
  • Electronic water-level control system
  • Low-voltage safety control circuits
  • Solid-state circuitry
  • Diagnostic LED Displays
  • Full port drain valve
  • ASME safety valve
  • UL/CUL/NOM/CE Listed

The Mr. Steam MX4 MS MAX Series 20kW Steam Shower Generator is a high-capacity steam shower generator designed for large residential steam baths sized from 483 to 678 adjusted cubic feet. Built with a stainless steel tank, industrial-grade serviceable heating element, electronic water-level control, diagnostic LED displays, and low-voltage safety circuits, it gives homeowners a durable steam solution for larger custom shower environments.

Best Uses for Mr. Steam MX4 MS MAX Series 20kW:

  • Best for homeowners building a large steam shower that requires a generator rated for 483 to 678 adjusted cubic feet.
  • Ideal for custom bathroom projects that need a 20kW steam generator available in 240V or 208V operation.
  • Best for shoppers who want a stainless steel tank, industrial-grade heating element, and durable electronic components for long-term use.
  • Well suited for larger home wellness spaces where consistent steam production and electronic water-level control are important.
  • Great for buyers who want installation-ready safety features such as low-voltage control circuits, an ASME safety valve, and UL/CUL/NOM/CE listings.
  • A strong fit for users who value service-friendly features like MiniDIN control connections, diagnostic LED displays, a full port drain valve, and optional Auto Drain.

Yes, we really do offer FREE shipping! We will send your order at no additional cost to anywhere in the lower 48 states in the US. If you have questions about shipping to Alaska or Hawaii, please contact us through our live chat to discuss a custom freight quote.

Let customers speak for us

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FAQ

GENERAL INQUIRIES

We are located in Indianapolis, Indiana.

Yes, we have some great financing options from our partner, Bread Pay. Just choose the monthly payment option at checkout to get started.

SHIPPING

Shipping in the Continental U.S. is free!

Since we carry different brands our products also ship from different locations.  See the list below:

  • Almost Heaven Saunas -  West Virginia
  • Dundalk Leisure Craft - Canada
  • Harvia - Portland
  • Baltic Leisure - Pennsylvania
  • Saunacore - Canada
  • TheraSauna- Iowa

The list below is the current delivery timeline by brand:

  • Almost Heaven Barrel Saunas - 6 to 8 Weeks
  • Almost Heaven Indoor Saunas - 4 to 6 Weeks
  • Amba Products - 1 to 2 weeks
  • Baltic Leisure - 3 to 4 weeks
  • Dundalk Leisure Craft -  Approximately 1 to 2 weeks after the estimated build date
  • Golden Designs Sauna - Within 1 week
  • Saunacore - 2 to 3 weeks
  • TheraSauna - 10 to 12 weeks

We currently do not ship to Alaska but if you are really interested we can request for a custom freight quote.

SAUNA ASSEMBLY

It is an easy assembly. Here is the link to our video gallery for a quick look.

The sauna comes in a crate. You'll need to assemble it but it is a very quick assembly.