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Short answer: the C2 is worth it if you want a warm-air dryer, a deodorizer, and the extra hygiene features (PREMIST bowl mist and EWATER+ wand cleaning), because the A2 has none of them. If all you need is a warm-water wash and a heated seat with side-panel controls, the A2 covers that.
How we compare: every spec in this article comes from official manufacturer specifications and manuals (starting with TOTO USA’s official product page), all listed under Sources below. We don’t run hands-on tests, and if a spec isn’t published, we say so. Last updated: October 2026.
I live in Japan, where TOTO bidet seats are a normal part of everyday life. You find them in homes, train stations, and shopping malls.
I haven’t installed or tested these two US models. This comparison uses only TOTO USA’s official comparison chart, fit chart, and instruction manual, all linked at the end.
Quick Comparison Table
| Feature | TOTO Washlet A2 (SW3004) | TOTO Washlet C2 (SW3074) |
|---|---|---|
| Shape | Elongated | Elongated |
| Controls | Side panel | Side panel |
| Rear / soft rear / front cleanse | Yes / Yes / Yes | Yes / Yes / Yes |
| Oscillating cleanse | Yes | Yes |
| Pulsating cleanse | No | Yes |
| Water pressure settings | 5 | 5 |
| Water temperature settings | 3 | 3 |
| Heated seat (settings) | Yes (3) | Yes (3) |
| Warm-air dryer | No | Yes (3 temperature settings on TOTO’s comparison chart*) |
| Deodorizer | No | Yes |
| PREMIST (bowl mist) | No | Yes |
| EWATER+ | No | Yes (wand) |
| Self-cleaning wand | Yes | Yes |
| Soft-close seat and lid | Yes | Yes |
| Energy-saver timer | 6, 9 hours | 6, 9 hours |
| Rated power | 287 W | 403 W (max 512 W) |
| Product size | 18-5/8” W x 20-7/8” D x 6-5/8” H | W 472 mm x D 530 mm x H 147 mm (manual) |
| Power cord | 3.9 ft (1.2 m) | 3.9 ft (1.2 m) |
| Water heater type | Not stated in chart | Tank type |
| Where to buy | TOTO A2 SW3004 | TOTO C2 SW3074 |
*TOTO’s online comparison chart shows 3 air temperature settings for the C2, while some third-party copies of the C2 spec sheet describe “five variable temperature settings.” The official chart is used here. Check the current listing.
Key differences at a glance
- Warm-air dryer: The C2 has a warm-air dryer (about 95–140 °F per TOTO’s manual), and the A2 has none.
- Deodorizer: The C2 has an automatic air deodorizer, and the A2 does not.
- Hygiene features: The C2 adds PREMIST, which mists the bowl before use, and EWATER+, which cleans the wand; the A2 has neither.
- Spray modes: Both have oscillating spray, but only the C2 adds pulsating spray.
- What stays the same: Both share rear, soft rear, and front cleanse, 5 pressure and 3 water temperature settings, a 3-setting heated seat, side-panel controls, a soft-close lid, and an energy-saver timer.
What You Get by Upgrading to the C2
1. A warm-air dryer
The A2 has no dryer. The C2 does, and TOTO’s manual lists the dryer’s air temperature range as about 95–140 °F.
TOTO pitches the dryer as a way to reduce how much toilet paper you need. For many buyers this is the single biggest reason to step up.
2. A deodorizer
The C2 has an automatic air deodorizer. The A2 doesn’t.
3. PREMIST and EWATER+
These two hygiene features are C2-only between this pair:
- PREMIST mists the bowl before use.
- EWATER+ cleans the wand.
Both models have a self-cleaning wand and a wand cleaning mode, but the A2 lacks the EWATER+ system.
4. Pulsating spray
Both have oscillating spray. Only the C2 adds pulsating spray.
What stays the same
You don’t gain anything in the basics. Both have the same:
- Rear, soft rear, and front cleanse
- 5 water pressure settings
- 3 water temperature settings
- 3-setting heated seat
- Side-panel controls
- Soft-close lid
- Energy-saver timer
Power and Size
TOTO lists rated power of 287 W for the A2 and 403 W for the C2. The C2 manual adds a 512 W maximum for warm water or the heated seat.
These are rated figures, not annual usage. TOTO doesn’t publish yearly kWh on these documents, so I won’t estimate an electricity bill.
Size is listed differently for each:
- A2: 18-5/8” W x 20-7/8” D x 6-5/8” H (TOTO fit chart)
- C2: W 472 mm x D 530 mm x H 147 mm (about W 1.55 ft x D 1.74 ft x H 0.48 ft, TOTO instruction manual)
Both are elongated seats. TOTO defines elongated as about 18.5 inches from the mounting holes to the front of the bowl, versus 16.5 inches for round. Measure your toilet before buying.
Who Should Buy Which?
Choose the A2 if you:
- Just want a warm-water wash plus a heated seat
- Don’t care about a dryer or deodorizer
- Want the lower rated power (287 W)
Choose the C2 if you:
- Want a warm-air dryer to cut toilet paper use
- Want a deodorizer
- Value PREMIST and EWATER+ for keeping things cleaner
- Like having pulsating spray
One thing to check before buying: TOTO’s current Washlet fit chart PDF lists the A2 but not the C2. TOTO’s comparison page still shows the C2. Confirm the C2 is still available new before you order.
If the C2 looks right, the next decision is usually controls; see TOTO C2 vs C5. Before ordering either seat, check the measurements in which TOTO Washlet fits my toilet.
A Japan-Side Note on Washlets
In Japan, “Washlet” is TOTO’s brand name, and the domestic lineup is entirely different from the US A2 and C2. TOTO Japan’s top bidet-seat line is the Washlet Apricot, which uses instant (瞬間式) heating, offers colors like pastel ivory and pastel pink, and adds electrolyzed “kirei jokin-sui” water to clean the bowl and nozzle. TOTO Japan also notes a quirk of instant heating: in winter, when water is cold, the nozzle can take longer to start. Japanese models are designed for Japanese toilets and 100 V power, so stick with US-listed models like the A2 and C2.
Japanese reviewers of the current Apricot F3 on Kakaku.com often mention quieter operation and easier cleaning than older units; complaints include a motion sensor that may not react depending on where the door is, and a strongest spray some found weaker than before. (Third-party reviews, not our own testing.)
Washlet A2 vs C2: Frequently Asked Questions
Does the TOTO A2 have a dryer?
No. TOTO’s comparison chart shows no air dryer and no deodorizer for the A2 (SW3004).
What does the C2 add over the A2?
A warm-air dryer, a deodorizer, PREMIST, EWATER+ (wand), and pulsating spray, according to TOTO USA’s comparison chart.
Do both use side-panel controls?
Yes. Neither the A2 nor the C2 has a wireless remote. In this lineup, the C5 is the step up with a remote.
Will the A2 or C2 fit a round toilet?
Both are listed as elongated. TOTO’s elongated seats are about 18.5 inches from the mounting holes to the front of the bowl, while round toilets are 16.5 inches.
How much power do they use?
TOTO lists rated power of 287 W (A2) and 403 W (C2, 512 W maximum). Actual yearly energy use isn’t published in these documents.
Do both have a heated seat?
Yes. Each has a heated seat with 3 temperature settings.
Related comparisons
- TOTO Washlet C2 vs C5: What’s Actually Different?
- TOTO Washlet C5 vs S7: Tank or Instant Heating?
- Will a TOTO Washlet Fit My Toilet? Round vs Elongated
- TOTO Washlet C5 Power Consumption: Watts and Yearly Cost
Sources
- TOTO USA, WASHLET Bidet Comparison Chart: https://www.totousa.com/washlet-new
- TOTO USA, WASHLET Fit Chart (PDF; A2 specs, power, and size): https://www.totousa.com/filemanager_uploads/product_assets/OwnersManual/Washlet-Fit-Chart.pdf
- TOTO USA, Instruction Manual for SW3074/SW3024 (PDF; C2 power, tank, and dimensions): https://www.totousa.com/filemanager_uploads/product_assets/OwnersManual/D07A82_SW3024_OM_EN.pdf
- TOTO Japan: Washlet Apricot product page (jp.toto.com): https://jp.toto.com/products/toilet/apricot/
- TOTO Japan FAQ: instant vs tank-type Washlet (qa.toto.jp): https://qa.toto.jp/faq_detail.htm?id=161801
- Kakaku.com user reviews: TOTO Apricot F3 (Japanese): https://review.kakaku.com/review/J0000042091/
Specs checked October 2026.
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