Best Smart Toilets of 2026: Top Bidet Toilet Combos

A bidet toilet combo, also called an integrated smart toilet or all-in-one toilet, is a single fixture that combines a toilet bowl, a heated bidet seat, a warm-water rear and front wash wand, a warm-air dryer, a deodorizer and an automatic flush mechanism. The components are factory-built together, which means the seat fits the bowl precisely and the self-cleaning systems can treat the whole interior. Popular examples include the TOTO Neorest NX2, the Kohler Numi 2.0 and the Woodbridge B0970S.

When you sit down, the heated seat activates and the proximity sensor notes your presence. After use, pressing the wash button or triggering the auto wash cycle extends a retractable wand from inside the rim that sprays warm, adjustable-pressure water for cleansing. A warm-air dryer follows. When you stand up, the auto flush fires and the lid closes automatically. Most units also mist the wand and bowl with electrolyzed or treated water between uses as a self-cleaning step.

Yes. Every integrated bidet toilet requires a dedicated 120-volt, grounded GFCI electrical outlet within 4 to 6 feet of the toilet's location. The electronics power the heated seat, the wand motor, the dryer, the auto flush solenoid and any sensors. Without power, most smart toilets still flush manually, but all bidet and auto features become unavailable. Installing a GFCI outlet is a required electrical task before a smart toilet installation and is governed by building codes in most jurisdictions.

The Maximum Performance (MaP) flush test is an independent test conducted by organizations including the Alliance for Water Efficiency that measures grams of simulated solid waste a toilet can clear in a single flush. For residential toilets, the EPA WaterSense program requires a minimum 350-gram MaP score. Most smart toilets in this roundup score between 600 and 800 grams. An 800-gram score means the toilet can clear well over twice the regulatory minimum in one flush, which significantly reduces clogging risk.

Several integrated smart toilets carry EPA WaterSense certification, which requires a maximum flush of 1.28 gallons per flush and a minimum MaP score of 350 grams. The Woodbridge B0970S and B0980S, the Swiss Madison Vivante and several Kohler Intelligent models meet these criteria. TOTO Neorest units use 0.8 to 1.0 gallons per flush, which exceeds the WaterSense efficiency requirement, though TOTO markets them under its own eco-flush branding rather than always pursuing the WaterSense label for every model variant.

You can flush most integrated smart toilets manually even without power, since the ceramic flush mechanism itself is gravity-fed in most residential units. However, the heated seat, wash wand, dryer, auto flush and deodorizer all require power. If your bathroom loses electricity, you have a functional toilet but a non-functional bidet system. This is one reason some buyers prefer a modular setup, like the TOTO Drake with a Washlet S7A seat, where the toilet alone functions fully without the seat attached.

Installation requires shutting off the water supply, removing the old toilet, setting the new unit on a wax ring, connecting the water supply line and plugging into a GFCI outlet. Most integrated smart toilets weigh between 90 and 130 pounds, so a second person is needed for placement. The electrical and water connections are standard plumbing tasks, but the weight and size make professional installation advisable for most homeowners. Allow two to three hours for a plumber to install and set up the electronics.

Evaluate rear wash water temperature range (typically 86 to 104 degrees Fahrenheit), adjustable nozzle position (front to back range), water pressure adjustment (at least three levels), whether front feminine wash is included, warm-air dryer availability and dryer temperature, and whether the nozzle self-cleans with electrolyzed or UV-treated water between uses. TOTO's eWater+ system and Kohler's auto-clean wand are among the most thorough self-cleaning systems in the category.

An integrated bidet toilet combo offers a factory-fit between the bowl and seat electronics, a cleaner external appearance with no visible seat-to-bowl seam, and self-cleaning systems designed around the ceramic from the start. A quality bidet seat on a strong toilet, like a TOTO Washlet S7A on a TOTO Drake, is often more repairable and less expensive, with the option to replace either component independently. For most homeowners who want long-term value and maximum flush power, the modular combination is more practical. For aesthetics-first buyers or those remodeling from scratch, the integrated combo wins on appearance.

Warranties vary significantly. TOTO Neorest units carry a 1-year limited warranty on electronic components. Kohler's Numi 2.0 offers 3 years of limited coverage, the longest standard warranty in this roundup. Woodbridge and Swiss Madison typically provide 1-year warranties. The ceramic bowl itself usually carries a longer warranty (often limited lifetime) from all major brands, since ceramic failure is rare. Ask your dealer about extended protection plans for the electronics before purchasing, as a decade of daily use puts significant wear on the boards and motors.

Use a non-abrasive, non-bleach cleaner on the ceramic bowl since bleach and abrasive cleaners can degrade CeFiONtect and similar nano-glaze coatings over time. Wipe the exterior electronics housing with a damp cloth only. Do not spray water directly at the controller panel, seat hinge or wand housing. Most integrated units have a self-cleaning wand cycle (activated by holding the wash button) that flushes the wand with treated water. Run it weekly. The nozzle tip itself can typically be removed and rinsed manually per the manufacturer's instructions.

Smart toilets can clog, but units with a 600-gram MaP score or higher are designed with enough flush volume and bowl geometry to clear typical daily use without issues. The most clog-prone smart toilets are inexpensive units with small trapways and weak flush valves. The TOTO Neorest and Kohler Intelligent lines both use engineered, wide-channel trapways with strong flush volumes that make clogging uncommon. If clogging is a specific concern, a modular setup using the TOTO Drake (rated a perfect 1,000 grams on MaP) with a bidet seat is the most clog-resistant smart option.

Most integrated smart toilets in North America are designed for a 12-inch rough-in, which is the standard in the vast majority of homes. Some models are available in 10-inch variants for older homes. Measure from the finished wall behind the toilet to the center of the floor drain bolts before ordering. A few ultra-slim or wall-mount smart toilets require a different rough-in altogether and separate in-wall carrier hardware, which adds to installation complexity and cost.

The flush itself functions normally during power outages on gravity-fed integrated smart toilets, since the fill valve and flush mechanism are water-powered. The heated seat, washlet, dryer, auto flush and deodorizer all stop working without electricity. Some units include a battery backup for the auto flush only. If reliable bidet function during power outages is important, a non-electric bidet attachment on a standard toilet is the only option that works completely without electricity.

For seniors, the most important features in a bidet toilet combo are comfort height (17 to 19 inches from floor to seat), a heated seat that activates quickly, a gentle auto flush that does not require physical handle operation, and a washlet that reduces the need for manual wiping, which is especially valuable for users with limited mobility or arthritis. The TOTO Neorest NX2 and the Woodbridge B0970S both offer comfort-height bowls with all of these features. For a broader look at accessibility in toilet design, see our guide to best toilets for seniors.

The ceramic bowl of a quality integrated smart toilet, from TOTO, Kohler or Woodbridge, should last 20 to 30 years under normal residential use, the same as a standard toilet. The electronics, including the seat heating element, wand motor, sensor board and flush solenoid, have shorter service lives, typically 8 to 15 years depending on use frequency, water quality and power stability. Brands with accessible parts and established plumber networks, particularly TOTO and Kohler, give you the best chance of repairing rather than replacing the electronics when issues occur.

Smart toilets typically offer a dual-flush system with a light flush of 0.8 to 1.0 gallons for liquid waste and a full flush of 1.0 to 1.28 gallons for solid waste. The EPA WaterSense program certifies toilets at or below 1.28 gallons per flush. The most water-efficient smart toilets, including the TOTO Neorest NX2 at 0.8 and 1.0 GPF, use substantially less water than standard 1.28 GPF or 1.6 GPF toilets while maintaining strong MaP flush performance. Over a year, the dual-flush saving can amount to thousands of gallons compared to a single-flush 1.6 GPF toilet.

TOTO and Kohler are the two most respected brands in the US integrated smart toilet market, and both make excellent products. TOTO has the longer track record in washlet and integrated toilet technology, with Neorest models widely regarded as the benchmark for flush performance and self-cleaning in a smart toilet. Kohler's Numi 2.0 offers the longer 3-year warranty and more advanced smart-home integration with Alexa and Bluetooth. For buyers who prioritize flush engineering and self-cleaning technology above all else, TOTO is typically the first recommendation. For smart-home integration and warranty coverage, Kohler has an edge.

Hard water creates mineral buildup inside the wash wand and on ceramic surfaces over time. Smart toilets with nano-glaze coatings, such as TOTO's CeFiONtect, resist calcium and mineral adhesion on the ceramic. The wand housing is more vulnerable: hard water scale can narrow the nozzle and reduce wash pressure over time. Running a wand self-clean cycle regularly and periodically soaking the nozzle tip in diluted white vinegar (per manufacturer instructions) are the two most consistently recommended maintenance steps for hard water areas.