Kohler Steam Generator Control Kit

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Kohler K-5558 Invigoration 2.0 Tandem Steam Generator Control Kit

Digital Tandem Control Kit for Kohler Invigoration® 18–30kW Steam Systems — Available in 7 Finishes

The Kohler K-5558 Tandem Steam Generator Control Kit is the required control interface for Kohler Invigoration® 2.0 tandem steam generator systems rated 18kW–30kW. It enables coordinated digital communication between multiple Kohler Invigoration® generators, allowing precise, unified control of steam delivery, temperature, and system timing from a single interface.

Designed to integrate seamlessly with the Kohler Invigoration® ecosystem, the K-5558 brings digital precision to high-output residential steam showers — available in seven premium finishes to complement your shower hardware.

Important: This kit is a required system component and is not a standalone product. Compatible Kohler steam generators, steam heads, and installation accessories are required and sold separately.

Available Finishes: Polished Chrome, Brushed Nickel, Matte Black, Brushed Brass, Brushed Bronze, Polished Nickel, and Titanium. Select your finish from the dropdown above.

▶ Watch: Kohler Invigoration Steam Shower Overview

Who This Is For

The K-5558 is required for any Kohler Invigoration® 2.0 tandem steam generator installation (18kW–30kW). If you are building or upgrading a high-output residential steam shower with a Kohler tandem generator system, this control kit is a mandatory component of your setup.

Key Features

Required control kit for Kohler Invigoration® 2.0 tandem generator systems (18kW–30kW)
Enables coordinated digital communication between multiple Kohler generators
Supports precise temperature management and steam delivery control
Integrates with Kohler's digital steam control ecosystem
Designed for residential steam shower applications
Available in 7 premium Kohler finishes to match your shower hardware

Specifications

Model: K-5558
Compatibility: Kohler Invigoration® 2.0 tandem steam generator systems (18kW–30kW)
Application: Residential steam shower
Available Finishes: Polished Chrome (CP), Brushed Brass (2MB), Matte Black (BL), Brushed Nickel (BN), Brushed Bronze (BV), Polished Nickel (SN), Titanium (TT)

What's Included

Kohler K-5558 Tandem Control Kit
Manufacturer-provided installation hardware
Installation documentation

Required Components Sold Separately

The K-5558 is not a standalone system. The following components are required for a complete installation:

Kohler K-32332-NA 18kW Steam Generator
Kohler K-32333-NA 22kW Steam Generator
Kohler K-32334-NA 26kW Steam Generator
Kohler K-32335-NA 30kW Steam Generator
Kohler K-5549-K1 Tandem Steam Adapter Kit
Compatible steam heads, temperature sensor, and installation accessories

Shipping & Delivery

This product ships free to the contiguous United States. Estimated Delivery Time: Most orders arrive within approximately 4–7 business days, including processing and transit time. Tracking information will be provided by email once your order ships.

Installation Notes

Must be used with compatible Kohler Invigoration® 2.0 tandem generator systems only
Professional installation by a licensed plumber or steam shower contractor is strongly recommended
Verify compatibility with all system components prior to installation
Follow all manufacturer guidelines and applicable local building codes

Warranty

This product includes Kohler's full manufacturer warranty. As an authorized Kohler retailer, Prime Regeneration ensures complete warranty coverage is passed through to you at the time of purchase.

Manuals & Documentation

Installation and specification documents are included with this product. Contact us if you need documentation prior to purchase.

Complete Your Steam Shower System

Build out your full Kohler Invigoration® 2.0 steam shower with compatible generators and accessories.

FAQ

Is the K-5558 required for my Kohler tandem steam system?
Yes. The K-5558 Tandem Control Kit is a required component for all Kohler Invigoration® 2.0 tandem generator installations (18kW–30kW). It cannot be substituted with a single-generator control kit.

Which generators is the K-5558 compatible with?
The K-5558 is compatible with Kohler Invigoration® 2.0 tandem steam generators: K-32332-NA (18kW), K-32333-NA (22kW), K-32334-NA (26kW), and K-32335-NA (30kW).

Do I also need the K-5549-K1 Adapter Kit?
Yes. The Kohler K-5549-K1 Tandem Steam Adapter Kit is also required for proper system integration and is sold separately.

What finishes are available?
The K-5558 is available in Polished Chrome, Brushed Nickel, Matte Black, Brushed Brass, Brushed Bronze, Polished Nickel, and Titanium.

Does this ship for free?
Yes — free shipping is included to the contiguous United States.

Is professional installation required?
Professional installation by a licensed plumber or steam shower contractor is strongly recommended. Improper installation may void the manufacturer warranty.

Kohler Steam Generator Control Kit | K-5558 Invigoration Tandem Steam Review Summary

4.8

27 online ratings

What people like

The Kohler K-5558 Invigoration Series Tandem Steam Generator Control Kit is generally viewed as a functional and necessary component for operating Kohler steam generators. Users appreciate its ability to control steam room features like temperature and duration. Some reviews highlight the importance of professional installation. However, some have expressed concerns regarding its longevity and potential for failure over time. Customer support experiences appear to vary, with some finding it helpful and others encountering challenges.

Pros

Intuitive Digital Interface: Reviewers highlight the ease of navigating settings, allowing for precise adjustments to temperature and duration without a steep learning curve.
Sleek Modern Design: The minimalist and low-profile aesthetic is frequently praised for its ability to blend seamlessly into luxury shower installations.
Consistent Heat Delivery: The system maintains a very steady temperature throughout the session, providing a reliable and comfortable steam flow.
Luxury Spa Experience: Users feel the system successfully transforms a standard shower into a professional-grade steam room, significantly enhancing their home wellness routine.

Cons

High Installation Cost: Many owners note that the setup requires professional electrical and plumbing work, which can add significant expense to the overall project.
Premium Price Point: Several reviews mention that the initial cost of the kit is higher than many other steam control options available on the market.
Complex Setup Process: Some users found the configuration for tandem generators to be technical and challenging, requiring strict adherence to detailed wiring diagrams.
Regular Maintenance Needs: A few users pointed out that the system requires periodic cleaning and attention to mineral buildup to ensure the sensors and steam components continue to function properly.