Choosing between the Brondell Swash CL1500 and SE400 comes down to more than just price — these two bidet seats for existing toilets have more meaningful differences than you might think.
This comparison breaks down every key difference so you can find the one that actually fits your needs and your bathroom.
| Feature | Brondell Swash CL1500 | Brondell Swash SE400 |
|---|---|---|
| Image |  |
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| Dimensions (L x W x H) | 20.8″ x 18.5″ x 5.7″ | 20.9″ x 18.5″ x 6.1″ |
| Water Heating | Hybrid (tank + on-demand) | Tank-based only |
| Nozzle | Stainless steel, self-cleaning | Stainless steel, self-cleaning |
| Wash Modes | Rear, front, strong, gentle, pulse, oscillation | Rear, front, massage, pulse, oscillation |
| Carbon Deodorizer | Yes (carbon-block filter) | No |
| Warm Air Dryer | Yes (5 levels) | Yes (5 levels) |
| LED Night Light | Yes | Yes |
| Warranty | 3 years | 1 year |
| Buy Now |  |
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1. Brondell Swash CL1500
The Brondell Swash CL1500 sits at the upper end of Brondell’s side-arm-controlled lineup, and it earns its place there with a notably more complete feature set than its sibling below.
Its hybrid heating system combines a small warm water reserve with on-demand heating — so you get instant warm water every time without the cold-water drop-off that purely tank-based models can suffer from.
If you’re looking for a seat that covers every comfort base, the CL1500 is the stronger all-around performer in this comparison.
Features
- Hybrid water heating (tank + on-demand) for consistent warm water
- Stainless steel, positionable self-cleaning nozzle with auto rinse before and after each use
- Multiple wash modes: rear, front, strong, gentle, pulse, and oscillation
- 5-level warm air dryer for a paper-free dry
- Carbon-block deodorizer that traps odors at the source instead of masking them
- Ergonomic heated seat with three adjustable warmth levels
- LED nightlight, eco mode, gentle-close lid, and quick-release seat for easy cleaning
- Side-arm control panel with intuitive button layout
Pros
- Hybrid heating means warm water doesn’t run out mid-wash like a standard tank model
- Carbon deodorizer actively cleans the air — a meaningful upgrade over seats with no deodorizer
- Sleeker low-profile design at 5.7″ height vs the SE400’s 6.1″ — looks better on most toilets
- 3-year warranty is one of the best in its price class and beats the SE400 by two full years
- Strong wash mode adds cleaning power that the SE400 lacks
Cons
- Costs more than the SE400 — worth it for most buyers, but budget shoppers will feel the gap
- Side-arm control only — no wireless remote option in this product line
- No dual nozzle setup for separate rear and front wash heads
Check its current price on Amazon
2. Brondell Swash SE400
The Brondell Swash SE400 is Brondell’s entry point into the heated bidet seat category, and it delivers a solid range of features for buyers who want a capable electric bidet at a lower price point.
It covers all the fundamentals — warm water, heated seat, adjustable nozzle, and a warm air dryer — and its stainless steel nozzle is a real win at this price tier.
It’s a reliable everyday performer, though it does skip a few features that more hygiene-focused or comfort-seeking buyers will miss.
Features
- Tank-based water heating with adjustable temperature settings
- Stainless steel oscillating self-cleaning nozzle with 5 adjustable positions
- Multiple wash modes: rear, front, massage, pulse, and oscillation
- 5-level warm air dryer
- Ergonomic heated seat with three warmth levels
- LED nightlight with on/off option
- One-touch auto mode, eco mode, gentle-close lid, and side-arm control panel
Pros
- More affordable than the CL1500 — a great entry point for first-time bidet buyers
- Stainless steel nozzle is a premium touch at a budget-friendly price
- Easy DIY install in under an hour with included hardware
- Aerated water spray is gentle on sensitive skin
- One-touch auto mode simplifies the experience for everyday use
Cons
- Tank-based heating can run out of warm water during extended use
- No deodorizer of any kind — a notable omission compared to the CL1500
- Taller profile at 6.1″ vs the CL1500’s 5.7″ — less sleek on the toilet
- Weight capacity is 275 lbs — lower than most competing seats, which typically support 300+ lbs
- Only 1-year warranty — significantly less protection than the CL1500
Check its current price on Amazon
Water Heating: Hybrid vs Tank
This is the most practical difference between these two seats.
The SE400 uses a traditional tank-based heating system that stores a set volume of warm water.
For quick washes that’s perfectly fine, but if you take longer wash cycles or share the bathroom with family members who use the bidet back-to-back, the tank can run out — leaving you with a cold-water surprise mid-wash.
The CL1500’s hybrid heating system eliminates that risk.
It combines a small reserve of pre-heated water with on-demand heating capability — so the warm water doesn’t run out, and there’s no meaningful wait time before it kicks in.
If you use the bidet frequently, this single difference makes the CL1500 a noticeably better daily experience.
Winner: Brondell Swash CL1500 — hybrid heating is a meaningful upgrade in real-world use.
Hygiene Features: Deodorizer Makes a Difference
Both seats use a stainless steel self-cleaning nozzle that auto-rinses before and after every wash — a strong hygiene baseline that’s better than plastic-nozzle alternatives you’ll find when shopping bidets for home use.
But the CL1500 goes a step further with its built-in carbon-block deodorizer.
Unlike fragrance-based deodorizers that just mask smells, the carbon-block filter actually traps and removes odor molecules from the air.
The SE400 has no deodorizer at all — this is one of the reasons it rings up cheaper, and a real consideration if bathroom odor control matters to you.
For a full look at how hygiene features stack up across top seats, check out the bidet toilet seat comparison chart on this site.
Winner: Brondell Swash CL1500 — the carbon deodorizer is a genuine hygiene upgrade that the SE400 simply doesn’t offer.
Comfort & Design
At first glance, these two seats look nearly identical — same brand, same side-arm controls, same color scheme.
But look at the dimensions and you’ll notice the SE400 sits 0.4″ taller than the CL1500 (6.1″ vs 5.7″ height).
That difference affects how the seat blends with your toilet visually — the CL1500’s lower profile looks considerably sleeker from the side.
Both seats have a heated ergonomic seat with three warmth levels, five-position nozzle adjustment, and a gentle-close lid.
Both are also comfortable to sit on, with a sittable lid design.
The SE400’s slightly higher profile also means it can feel like it pushes you forward when seated — a small but noticeable issue some users report, especially male users.
Winner: Brondell Swash CL1500 — the slimmer 5.7″ profile wins on aesthetics and seated comfort.
Wash Modes & Spray Performance
Both seats cover the fundamentals — rear wash, front feminine wash, massage, pulse, and oscillation modes.
The CL1500 adds a dedicated strong wash mode that the SE400 doesn’t have.
Strong mode delivers a more concentrated, powerful spray for a deeper clean — useful for users who want maximum cleansing performance and not just a gentle rinse.
Both seats use aerated water that mixes in air to create a softer, broader spray that feels gentler on sensitive skin, which is especially appreciated by new bidet users.
If spray power and wash variety matter to you, the CL1500 edges ahead again.
For a broader perspective on spray performance across brands, our guide to bidets with warm water and dryer is a great companion read.
Winner: Brondell Swash CL1500 — strong mode gives it a meaningful spray versatility advantage.
Value & Warranty
The SE400 costs less upfront — and that’s a real consideration if you’re on a tight budget.
But warranty coverage tells a very different story.
The CL1500 backs you with a 3-year limited warranty, while the SE400 covers you for just 1 year.
That’s two extra years of protection against defects, and given that these are precision electronic bathroom appliances, that gap matters.
When you factor in the deodorizer, the hybrid heating, the stronger wash mode, and the slimmer profile — the CL1500’s premium is well earned.
The SE400 is best positioned as an entry-level option for buyers who want to get into electric bidet territory without spending much.
If your budget allows, the CL1500 is the smarter long-term investment.
For more budget-tiered guidance, the best bidets under $500 guide on this site is worth a read.
Winner: Brondell Swash CL1500 — 3-year warranty and better feature set make it the better value over time.
Verdict — Which One Should You Buy?
The CL1500 wins this comparison in nearly every head-to-head category — and that’s not a close call.
If the price difference between the two is within reach for you, choose the CL1500 every time.
Buy the Brondell Swash CL1500 if:
- You want warm water that never runs out mid-wash
- Bathroom odor control matters to you — the carbon deodorizer is a meaningful upgrade
- You prefer a slimmer, more modern-looking seat on your toilet
- You want the security of a 3-year warranty behind your purchase
- You use the bidet daily or multiple times a day
Buy the Brondell Swash SE400 if:
- You’re stepping into electric bidet seats for the first time and want to keep costs down
- You have short, occasional wash sessions where tank heating is perfectly adequate
- Odor control and strong mode are not priorities for your bathroom routine
- Budget is the single deciding factor in your purchase
For a broader look at how both of these Brondell models fit into the wider bidet landscape, the bidet toilet seat comparison chart is an excellent next stop — and if you’re still exploring the Brondell lineup, the Brondell Swash CL1700 vs TOTO WASHLET S2 comparison gives you a sense of what stepping up to the next tier looks like.
FAQ
Is the Brondell Swash CL1500 worth the extra cost over the SE400?
Yes, for most buyers it is.
The CL1500 adds hybrid heating, a carbon deodorizer, a strong wash mode, a slimmer profile, and doubles the SE400’s warranty coverage to 3 years.
Unless budget is the sole deciding factor, the CL1500 delivers meaningfully more for the additional cost.
Do both seats fit round and elongated toilets?
Yes, both the CL1500 and SE400 are available in elongated and round versions.
Always measure your toilet bowl before purchasing — elongated toilets typically measure 18″ or more from the bolt holes to the front rim, while round bowls measure 16″ to 17.75″.
Does the Brondell SE400 have a deodorizer?
No — the SE400 does not include any deodorizing function.
This is one of the key differences between the two seats and one of the most commonly cited reasons buyers choose the CL1500 instead.
How do the Brondell CL1500 and SE400 compare to Brondell’s higher-end models?
Both the CL1500 and SE400 use side-arm control panels rather than wireless remotes, which puts them below the Brondell Swash 1400 and CL1700 in the lineup.
If you want a wireless remote, stainless dual nozzles, and additional user presets, stepping up to the Brondell Swash 1400 is worth considering.
Conclusion
The Brondell Swash CL1500 vs SE400 comparison has a clear answer: the CL1500 is the better seat in almost every way that matters.
Better heating, better hygiene, better design, better warranty — and for a price difference that most buyers will consider worthwhile.
The SE400 makes sense only if you’re looking for a true budget entry point into the electric bidet world.
Otherwise, the CL1500 is the seat that will serve you better every single day.
If you’re still weighing your options across brands, don’t miss our guide to the best bidets for existing toilets — and if you’re curious how the Brondell lineup competes with TOTO, the CL1700 vs TOTO S2 comparison is a great read to bookmark.
