TOTO Washlet S5 vs S2: Which One Should You Choose?

The new TOTO Washlet S5 and S2 are two of the brand’s most popular bidet seats for modern bathrooms. At first glance, they seem very similar — both include warm-water cleansing, heated seats, warm air drying, and TOTO’s signature hygiene technologies.

So what actually separates the S5 from the S2?

The answer mainly comes down to design approach, controls, and personalization. Both models deliver a premium everyday experience, but they are designed for slightly different users and spaces. You can see both in our WASHLET and smart bidet seat collection.

If you are coming from an older seat, the S2 replaced the C2 and the S5 replaced the C5 — both changeovers are covered in C2 vs S2 and C5 vs S5.

A New Generation of Washlets

One reason the S5 and S2 are becoming increasingly popular is because they bring features that were previously found mostly in TOTO’s higher-end Washlets into a more accessible range.

Both models include:

• Continuous instant warm water
• Heated seat
• Warm air dryer
• PREMIST® bowl misting
• EWATER+® wand cleaning
• Automatic deodorizer
• Night light
• Adjustable spray settings

For many homeowners, these features completely change the daily bathroom experience without requiring a full smart toilet upgrade. Our guide to the eight must-know WASHLET features explains what each of these actually does day to day.

The Main Difference: Remote vs Side Controls

TOTO S2

The S2 uses an integrated side-arm control panel attached directly to the seat.

This setup works well for:

• Simpler bathroom layouts
• Guest bathrooms
• First-time bidet users
• Homeowners who prefer straightforward controls

The side panel keeps everything easy to access without adding a separate remote to the wall.

TOTO S5

The S5 replaces the side panel with a slim wireless remote control.

This creates:

• A cleaner overall appearance
• More flexibility in remote placement
• Easier use for multiple users
• A more refined everyday experience

The S5 also includes 4 personalized user memory presets, allowing different users to save their preferred settings for spray pressure, temperature, and washing mode.

TOTO Washlet S2: SW3346#01 TOTO Washlet S5: SW3446#01

Feature Comparison Table

Feature	TOTO Washlet S5	TOTO Washlet S2
Warm Water System	Continuous instant warm water	Continuous instant warm water
Heated Seat	Yes	Yes
Warm Air Dryer	Yes	Yes
PREMIST®	Yes	Yes
EWATER+® Wand Cleaning	Yes	Yes
Automatic Deodorizer	Yes	Yes
Night Light	Yes	Yes
Control Type	Wireless remote control	Integrated side-arm panel
User Memory Presets	4 user presets	—
Design Style	Slimmer, more minimal appearance	More practical integrated design
Best For	Primary bathrooms, multi-user households	Simpler setups and guest bathrooms
Overall Experience	More refined and personalized	Straightforward and functional

Design and Everyday Feel

The S5 has a more minimal appearance because there is no control panel attached to the seat. The remote creates a cleaner and more integrated look in modern bathrooms.

The S2 keeps a more practical design while still offering nearly all of the same core functionality.

Many homeowners choose:

• S2 for secondary bathrooms or simpler upgrades
• S5 for primary bathrooms where comfort and personalization matter more

Continuous Warm Water in Both Models

Unlike older bidet seats that relied on warm-water tanks, both the S5 and S2 use instantaneous water heating systems.

This means:

• Continuous warm water during use
• No waiting between users
• Better long-term efficiency
• More consistent performance

This upgrade is one of the reasons the new S-series has become so popular.

Which Washlet Is Right for Your Bathroom?

Choose the S2 if you:

• Want the core Washlet experience
• Prefer built-in controls
• Want a simpler setup
• Are upgrading a guest bathroom

Choose the S5 if you:

• Prefer a cleaner, more premium appearance
• Want a wireless remote
• Share the bathroom with multiple users
• Want personalized user presets

Both are excellent options. The choice mostly comes down to how much personalization and refinement you want in daily use. If the S5 is the one you are leaning towards, we wrote about it separately in why the S5 is becoming a top choice for Canadian homes.

Either seat needs a grounded outlet within reach of the toilet. If you are replacing the toilet as well, a WASHLET+ set hides the seat’s water supply inside the bowl, and the full range is in our TOTO collection. For the trade-offs of the brand as a whole, see the pros and cons of TOTO toilets.

Need Help Choosing Between the S5 and S2?

You can use the chat on our website to connect with an expert immediately. We can help you choose the right Washlet based on your bathroom, preferences, and budget.