Choosing between the TOTO Washlet A2 and C2 can feel overwhelming when both seats come from the same trusted lineup.
In this guide, you’ll get a clear, side-by-side breakdown so you can decide which one is right for your bathroom and budget.
| Feature | TOTO Washlet A2 (SW3004) | TOTO Washlet C2 (SW3074) |
|---|---|---|
| Image |  |
 |
| Dimensions (L x W x H) | 23-5/8″ x 20-5/8″ x 8-1/2″ | 24-7/16″ x 18-9/16″ x 7-7/8″ |
| Spray Modes | Rear, Front, Oscillating | Rear, Rear Soft, Front, Oscillating |
| Water Heating | Tank (reservoir) | Tank (reservoir) |
| Warm Air Dryer | No | Yes (3 temp settings) |
| Air Deodorizer | No | Yes |
| PREMIST + EWATER+ | No | Yes |
| Control Panel | Side arm panel | Side arm panel |
| Buy Now |  |
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1. TOTO Washlet A2 Electronic Bidet Toilet Seat (SW3004#01)
The TOTO Washlet A2 is designed for people who want a clean, reliable bidet experience without extra frills.
It’s the entry point into TOTO’s Washlet lineup — easy to use, easy to install, and built to last.
Features
- Gentle aerated warm water spray with dual-action rear and front cleansing
- Oscillating stream option for thorough coverage
- Heated SoftClose seat with 3 temperature settings
- Adjustable water temperature (3 settings) and pressure (5 settings)
- Self-cleaning wand that rinses before and after every use
- Convenient side arm control panel with illuminated buttons
- Auto energy-saving mode reduces power consumption
Pros
- Very simple and intuitive to operate — great for first-time users
- Compact side arm panel keeps things tidy and accessible
- TOTO’s legendary build quality at an accessible price point
- DIY installation that takes under 30 minutes on most elongated toilets
Cons
- No warm air dryer — you’ll still need toilet paper or a towel to dry off
- No air deodorizer
- No PREMIST or EWATER+ bowl protection technology
- Tank-style heater means warm water lasts only about 30–40 seconds
If you’re new to bidet seats for existing toilets and want something reliable without a steep learning curve, the A2 covers the essentials beautifully.
It’s a solid starting point, especially if you’ve been reading about the difference between a bidet and a washlet and are ready to make the jump.
Check its current price on Amazon
2. TOTO Washlet C2 Electronic Bidet Toilet Seat (SW3074#01)
The TOTO Washlet C2 sits one step above the A2 with a noticeably more complete feature set — including an air dryer, air deodorizer, and TOTO’s signature bowl hygiene technology.
It was the go-to mid-range Washlet for years, and it’s easy to see why so many households still swear by it.
Features
- Rear cleanse, rear soft cleanse, front cleanse, and oscillating spray modes
- Warm air dryer with 3 adjustable temperature settings
- Automatic air deodorizer with powerful odor-filtering
- PREMIST function wets the bowl before each use to prevent waste buildup
- EWATER+ electrolyzed water cleans the wand inside and out before and after every use
- Heated SoftClose seat with 3 temperature settings
- Adjustable water temperature (3 settings) and pressure (5 settings)
- Convenient side arm control panel
Pros
- Warm air dryer means you can skip toilet paper entirely
- PREMIST + EWATER+ combination keeps both the bowl and the wand noticeably cleaner
- Air deodorizer is a genuine quality-of-life upgrade, especially in shared bathrooms
- Still simple enough to use daily without any tech frustration
Cons
- Tank-style heater limits warm water to roughly 30–35 seconds per use
- The C2 has been discontinued by TOTO — see FAQ for more details
- No wireless remote or nightlight
For anyone who’s been comparing options on our bidet toilet seat comparison chart, the C2 hits a sweet spot between affordability and a full set of daily comfort features.
If you’ve already explored our best bidets for home use roundup, you know this type of mid-range seat punches above its weight.
Check its current price on Amazon
Head-to-Head: A2 vs C2 Across Key Categories
Cleansing Performance
Both seats deliver TOTO’s signature warm water cleanse with adjustable temperature and pressure settings.
Where the C2 pulls ahead is with its extra rear soft cleanse mode, giving you a gentler option for more sensitive days.
The A2 handles the basics — rear, front, and oscillating — very competently, but the C2’s expanded spray menu gives it more versatility.
Winner: TOTO Washlet C2
Hygiene Technology
This is where the gap between the two seats becomes most obvious.
The C2 comes equipped with TOTO’s PREMIST system, which mists the toilet bowl with water before each use to prevent waste from sticking — a feature that makes a real difference in daily cleaning.
On top of that, the EWATER+ system cleans the wand with electrolyzed water inside and out before and after every single use.
The A2 has a self-cleaning wand, but it doesn’t use EWATER+ — so the wand hygiene level simply isn’t in the same league.
If hygiene matters to you — and it should — this is the most important category to consider when you’re weighing your options.
Winner: TOTO Washlet C2
Drying and Comfort
The C2 includes a warm air dryer with three adjustable temperature settings, which lets you go completely toilet-paper-free if you choose.
The A2 does not have a dryer at all, so you’ll need to pat dry after each use.
Both seats share a heated SoftClose seat with three temperature settings — so you won’t feel a difference when sitting down.
But if full hands-free comfort is your goal, the C2 clearly wins here.
Winner: TOTO Washlet C2
Ease of Use
This one is a genuine tie.
Both seats use an identical side arm control panel design, and both are beginner-friendly by nature — especially if you’ve been reading up on bidet etiquette and best practices before making the leap.
Neither requires any tech know-how to operate, and both install easily on most elongated toilets in under 30 minutes.
For seniors or those with mobility concerns, both are excellent — but you can see our dedicated guide on the best bidets for seniors for more tailored advice.
Winner: Tie
Value for Money
The A2 is the more affordable of the two, and it earns its price tag honestly — you get solid TOTO quality with the core cleansing features working exactly as expected.
The C2 costs more, but the jump in the feature set — dryer, deodorizer, PREMIST, EWATER+ — is significant enough that many buyers will find it well worth the extra investment.
If you’re on a tight budget, the A2 is a genuinely excellent choice.
If you can stretch a little, the C2 delivers noticeably more value over its lifetime.
Winner: TOTO Washlet A2 (budget) / TOTO Washlet C2 (overall value)
Verdict: Which One Should You Buy?
Buy the TOTO Washlet A2 if…
- You’re new to bidet seats and want something simple and reliable
- Your priority is warm water cleansing without spending on extras
- You’re on a tighter budget and want to experience TOTO quality at its most accessible
- You don’t mind air-drying with toilet paper after each wash
Buy the TOTO Washlet C2 if…
- You want a fully paper-free experience with the warm air dryer
- Bowl hygiene matters to you and you want PREMIST + EWATER+ working daily
- You want a deodorizer for a fresher, more comfortable shared bathroom
- You’re ready to invest in a more complete mid-range bidet experience
Those looking to explore even further up the TOTO lineup — for example into integrated units — should check out our guide on the best toilets with bidet seats built in.
Frequently Asked Questions
Is the TOTO Washlet C2 still available to buy?
The TOTO Washlet C2 (SW3074#01) has officially been discontinued by TOTO.
Units may still be available from third-party sellers on Amazon while supplies last.
TOTO’s direct successor to the C2 is the Washlet S2 (SW3346#01), which includes all of the C2’s features plus instantaneous warm water heating, a nightlight, and a slimmer profile — making it a meaningful upgrade in every area.
Do the A2 and C2 fit round toilets?
Both the A2 (SW3004) and C2 (SW3074) are elongated models.
If you have a round bowl, TOTO offers round versions — the A2 round is the SW3003 and the C2 round is the SW3073.
If you’re unsure which style your toilet is, measure from the bolt holes to the front of the bowl — 18 inches or longer typically indicates an elongated toilet.
How long does the warm water last on the A2 and C2?
Both seats use a tank-style water heater, which means warm water is available for approximately 30–40 seconds before it cools down.
For most people, that’s enough for a comfortable wash.
If you share a bathroom and two people need consecutive warm washes, you may notice the second person gets cooler water — something to keep in mind.
The newer TOTO S-series models (like the S2) solve this with an instantaneous heater that delivers endless warm water.
Can I install either seat myself?
Yes — both the A2 and C2 are designed for easy DIY installation.
You’ll need a nearby GFCI outlet (within about 4 feet of the toilet) and basic hand tools.
Most users complete the swap in 20–30 minutes.
If you’re newer to bidet hardware, our bidet toilet vs bidet seat breakdown is a great primer before you get started.
Conclusion
Between the TOTO Washlet A2 and C2, the choice really comes down to how much of the experience you want.
The A2 is clean, honest, and effective — a perfect first Washlet that gets the essential job done without fuss.
The C2 is a fuller package: warm air drying, deodorizing, bowl misting, and EWATER+ wand hygiene all add up to a noticeably more complete daily routine.
If budget is your main concern, start with the A2 and you won’t be disappointed.
If you’re ready to go all-in on the bidet lifestyle, the C2 — or its successor the S2 — is where you really feel the difference every single day.
For more help navigating your options, our bidet seat comparison chart covers the full market landscape, and our best bidets for home use guide is the perfect next read.
