ThermaSol PROI-140 PRO Series I Essential Steam Shower Generator, 8kW w/Fast Start

The ThermaSol PROI-140 is a high-performance steam bath generator designed for residential steam rooms measuring 85 to 140 adjusted cubic feet. Powered by an 8kW heating system and operating on 208–240V single-phase power, the PROI-140 delivers a smooth, consistent steam experience with no lag or temperature spikes.

Built for durability and long-term reliability, the PROI-140 features all stainless-steel construction, professional-grade Incoloy low-watt-density heating elements, and an advanced split-tank design that separates heating and water feed functions to extend system lifespan. ThermaSol’s exclusive FastStart Technology delivers steam in seconds, while intelligent two-way CAN-Bus communication ensures precise control and dependable operation.

The PROI-140 is compatible with a wide range of ThermaSol controls and wellness accessories, allowing you to customize your steam shower experience. Flexible installation options allow the generator to be placed up to 50 feet away from the steam enclosure in closets, vanities, climate-controlled attics, or basements. Backed by a limited lifetime warranty, the PROI-140 is fully serviceable and UL and CSA listed for safety.

Features

• Constant steam flow and rate

• No steam lag or steam bursts

• FastStart Technology – steam in seconds, not minutes

• Split-tank design for increased longevity

• Two-way digital CAN-Bus communication technology

• Compatible with HydroVive and Serenity systems

• Professional-grade Incoloy low-watt-density heating elements

• Corrosion-resistant stainless steel construction

• 240V / single-phase operation

• Designed for steam rooms 85–140 adjusted cubic feet

• Designed, engineered, and manufactured in the USA

• Limited lifetime warranty

Includes

• 8kW steam bath generator

• In-line water screen kit

• Steamhead housing installation tool

• Steamhead housing and cable kit

• 208–240V power cord (5 ft)

• 50 ft CAN-Bus control cable

• Installation instructions

• Static cling warning label

• Warranty documentation

Specifications

• Model: PROI-140

• Kilowatt Rating: 8 kW

• Maximum Steam Room Size: 140 cubic feet

• Amperage: 37 A

• Heater Weight: 40 lbs

• Water Inlet: 3/8" NPT

• Steam Outlet: 1/2" NPT

• Safety Valve: 3/4" NPT

• Electrical Connection: NEMA 6-50P

• Voltage: 208–240V

• Phase: Single Phase (1PH)

• Width: 18"

• Depth: 23"

• Height: 14"