Description
The KOHLER Anthem K-28209-NA is the finishing piece that ties a steam or digital shower system together. It comes in a No finish (NA) finish so you can coordinate it with the rest of your fixtures.
In-wall Anthem digital thermostatic mixing valve with 2 independently controlled outlets, driven by the Anthem+ digital control. Below we explain what this part does, which systems it works with, how it is installed, and how to care for it, so you can order the right component the first time.
Quick Answer: What Is the KOHLER Anthem K-28209-NA?
The KOHLER Anthem K-28209-NA is a thermostatic valve in No finish (NA) from KOHLER designed to work with KOHLER Anthem+ (K-28214-ASC digital control + K-27756 controller module); steam via K-5548-K1/5549-K1/32311.
KOHLER Anthem K-28209-NA Specifications
| Brand | KOHLER |
|---|---|
| Equipment Type | Thermostatic Valve |
| Model Number | K-28209-NA |
| Product Line | Anthem |
| Warranty | KOHLER Electronic Faucets, Valves, and Controls 5-year limited |
| Outlets / Ports | 2 outlets (1/2 in), 1/2 in inlets |
| Voltage / Phase | 120V 60 Hz |
| Amperage | 1 A at 120V (GFCI-protected circuit) |
| Unit Dimensions (W x D x H) | 10-9/16 in x 10-3/16 in x 8-1/4 in |
| Unit Weight | 6 lb |
| Certifications | ASME A112.18.1/CSA B125.1, ASSE 1016, UL 1951, CSA C22.2 No. 14 and No. 68, UL/cUL Listed |
| Compatible With | KOHLER Anthem+ (K-28214-ASC digital control + K-27756 controller module); steam via K-5548-K1/5549-K1/32311 |
| Finish | No finish (NA) |
Key Features of the KOHLER Anthem K-28209-NA
- 2 independently controllable 1/2 in outlets; 1/2 in hot/cold inlets
- Up to 12 gpm at 45 psi; max 9.5 gpm per outlet
- Digital thermostatic mixing with antiscald protection
- Low-flow mode limits total flow to 1.75 gpm (CEC)
- 120V, 1 A; prewired 2-prong plug for GFCI receptacle; 32 ft data cable
- Fits standard 2x4 walls; 15-125 psi operating range
- KOHLER Konnect app compatible
How a Digital Thermostatic Valve Works
A digital thermostatic valve mixes hot and cold water to the exact temperature you choose and holds it there, even if someone runs water elsewhere in the house. Instead of a manual mixing cartridge behind the handle, an electronic valve is installed in an accessible location and is operated from a digital interface in the shower. Each port on the valve feeds a separate outlet, such as a showerhead, handshower or body sprays, so the number of ports determines how many water functions you can control.
How to Choose the Right Component
Steam and digital shower parts are designed as a system, so compatibility comes first. Before ordering, confirm three things:
- The generator or valve model. Controls, adapters and steamheads are matched to specific generator families and sizes. Single generators and tandem (two-generator) setups often use different kits.
- The control platform. Analog control kits, DTV+ and Anthem+ digital systems use different modules and cables, so pick parts from the same platform.
- The finish. Match the finish code on the steamhead, control, trim and accessories so everything looks consistent. Finish codes are part of the model number.
This part is compatible with: KOHLER Anthem+ (K-28214-ASC digital control + K-27756 controller module); steam via K-5548-K1/5549-K1/32311.
Ports / outlets: 2 outlets (1/2 in), 1/2 in inlets.
Send us your existing model numbers and we will confirm the full parts list, including cables and adapters that are easy to overlook.
Good, Better, Best: Where the KOHLER Anthem K-28209-NA Fits
At HVAC365 we organize every category into a simple Good, Better, Best framework so you can compare options without wading through jargon. Within our steam shower parts and controls lineup, this model sits in the Good tier: Essential features at a great value.
The Good tier is built around affordability and simplicity. You get dependable, proven equipment without paying for extras you may never use. It is the smart pick for first-time buyers, straightforward replacements, and bulk B2B or government purchases where consistent, budget-friendly specs matter most.
Not sure the Good tier is right for you? Compare it with the Better and Best options in the same category. Whatever tier you choose, the equipment is brand new and covered by the full manufacturer warranty, and our team is here to help you weigh features against budget.
Installation Tips
Professional installation is recommended. Shower controls, steamheads and speakers must be installed according to the manufacturer's guide so that seals, gaskets and wall penetrations stay watertight. Electronic modules, amplifiers and valves belong outside the wet area in a dry, accessible spot, and low-voltage cables should be routed and protected as the instructions describe.
Plan locations carefully during rough-in: place the in-shower control where it can be reached while seated, keep the steamhead low on the wall and away from seating, and leave an access panel for any valve or module installed in the wall or a nearby closet. Coordinating these details before tile goes up saves time and avoids costly rework.
Care and Cleaning
Clean finished surfaces with a soft cloth, mild soap and water, then dry them. Avoid abrasive pads and harsh cleaners, which can damage plated and specialty finishes. In hard-water areas, wipe fixtures after use to prevent mineral spots. For steamheads, keep the outlet and aromatherapy well clear and only add oils when the unit is cool. Check gaskets and connections during routine service of the steam system.
Regional Considerations
Water hardness varies across the country. Homes in the Southwest, Florida, Texas and parts of the Midwest often have hard water that leaves mineral deposits on fixtures and inside steam equipment, so regular wipe-downs and water treatment help. In colder northern climates, steam showers on exterior walls benefit from extra insulation so the system reaches temperature quickly. Our team can help you plan for local conditions.
What's Included and Compatibility
- Digital thermostatic valve
Compatible with: KOHLER Anthem+ (K-28214-ASC digital control + K-27756 controller module); steam via K-5548-K1/5549-K1/32311.
Manufacturer warranty: KOHLER Electronic Faucets, Valves, and Controls 5-year limited.
Ideal for:
- Anthem+ digital showers, including steam showers with a KOHLER digital steam adapter
Designing a Complete Steam Shower System
A complete steam shower brings several components together, and knowing how they fit makes planning easier:
- Steam generator: the electric boiler, installed outside the shower and sized to the room volume and finish materials.
- Control or digital interface: the in-shower panel that starts steam and sets temperature and time; digital platforms can also run showerheads, lights and music.
- Steamhead: the outlet that releases steam into the enclosure, often with an aromatherapy well.
- Valves and trim: the shower valve body behind the wall and the finished trim you see.
- Modules, adapters and cables: the electronics that connect a digital interface to the generator, valves and accessories.
- Accessories: speakers, lighting, drain pans and seats that finish the experience.
Choosing every part from one platform and one finish family keeps the system compatible and the look consistent. Our team regularly helps homeowners, designers and contractors build a complete parts list from a floor plan, so nothing is missing when the installer arrives.
Built for Homeowners, Contractors and Property Managers
- Homeowners: send us the model number of your generator or system and we will confirm the parts you need so nothing is missing on install day.
- Contractors and installers: order in two clicks, follow every shipment with live tracking, and reorder common parts from the HVAC365 Contractor Portal. We know the labor shortage is real, so we focus on getting the right part to the job the first time.
- Property managers: manage equipment for multiple properties from one dashboard and book a strategy call with our team to standardize models, plan replacements and control maintenance costs.
Why Buy from HVAC365?
HVAC365 is your everyday source for home comfort products. Our mission is to make buying equipment simple, transparent and accessible. Instead of a wall of part numbers, you get clear specifications, honest guidance and technology-driven tools that help you choose with confidence. Compared with traditional online wholesalers, we add AI-guided product discovery, side-by-side selection tools and help coordinating service, so you are never left guessing about compatibility or installation.
- Brand-new equipment with the full manufacturer warranty
- Clear, published specifications and plain-language explanations
- Fast shipping with tracking from order to delivery
- Real people who answer questions before and after the sale
- Ask about financing options to spread the cost of larger projects
We believe great home comfort should be accessible to everyone. Our team is happy to help with large-print spec summaries, phone-based ordering, or any other accommodation that makes shopping easier for you.
Frequently Asked Questions About the KOHLER Anthem K-28209-NA
What does the KOHLER Anthem K-28209-NA work with?
KOHLER Anthem+ (K-28214-ASC digital control + K-27756 controller module); steam via K-5548-K1/5549-K1/32311.
What finish is the KOHLER Anthem K-28209-NA?
No finish (NA). Matching finishes are available for steamheads, controls, trim and accessories.
Do I need professional installation?
Professional installation is recommended. Steam and digital shower components involve waterproofing, low-voltage wiring and connections to the generator or valve that should follow the manufacturer's instructions and local code.
Is this part waterproof?
Parts intended for the shower, such as controls, steamheads and speakers, are built for wet, steamy conditions when installed as instructed. Modules, amplifiers and valves are installed outside the wet area.
Can I upgrade my existing steam shower with this part?
Often, yes, as long as it is compatible with your generator or control platform. Tell us what you have and we will confirm the right upgrade path.
What warranty does it have?
KOHLER Electronic Faucets, Valves, and Controls 5-year limited.
Ready to order? Add the KOHLER Anthem K-28209-NA to your cart, or contact the HVAC365 team for help confirming sizing and compatibility. We are here to make your project simple from start to finish.
White Paper
