What a Smart Toilet Is, and What It Actually Does
A smart toilet is an ordinary toilet with the electronics built in. Instead of bolting a bidet seat onto a bowl you already own, the bowl and the washing system are engineered as one fixture, so the water line, the power connection, and the controls are designed to sit together. Every model in this collection is a TOTO integrated unit.
The wash is the point
A nozzle extends from under the seat, rinses you with warm water, then retracts and cleans itself. Spray position, water temperature, and pressure are all adjustable, and TOTO uses an aerated dual-action spray with oscillating and pulsating settings. Water is heated on demand on models like the NEOREST series and the WASHLET G5A Lite, so the warm wash does not run out partway through. A warm air dryer follows the spray: three temperature settings on the G5A Lite, five on the NEOREST NX2 and WX1.
The automation you notice every day
The lid opens as you approach and closes when you walk away. The bowl flushes on its own, with a manual backup for power outages. PREMIST wets the bowl before each use so waste has less to cling to. EWATER+ turns the supply water into a sanitizing rinse for the wand, bowl, and under-seat after every use. CEFIONTECT glaze keeps the ceramic smooth enough that less sticks in the first place, and the NEOREST NX2 lid adds ACTILIGHT clean light technology. A deodorizer pulls odor out of the bowl, and a nightlight means no overhead light at three in the morning.
Water use goes down, not up
TORNADO FLUSH spins water around a hole-free rim from angled nozzles instead of dumping it through rim holes. The NEOREST NX2, RS, AS, and LS use 1.0 and 0.8 gallons per flush. The WASHLET G5A Lite uses 1.2 and 1.0. The wall-hung NEOREST WX1 uses 1.2 and 0.8. All of them sit under the 1.28-gallon WaterSense limit.
Who gets the most out of one
Washing with water is easier than paper for anyone with limited reach, sensitive skin, or a recent surgery, and the hands-free lid and flush remove two more things to touch. TOTO builds these at Universal Height, so the seat sits closer to chair height and standing up takes less effort. If accessibility is the reason you are shopping, start with ADA compliant bidets and toilets. For background on the category, read what a smart toilet is.
Who Makes the Smart Toilets in This Collection
Every smart toilet in this collection is made by TOTO. TOTO introduced the WASHLET in 1980, the first luxury toilet seat with electronic bidet functionality, and has sold more than 70,000,000 WASHLET seats worldwide since. Japan is the birthplace of modern smart toilet technology, and the traits the category is known for, precise washing systems, quiet flushing, and tankless shapes, come out of that lineage.
One brand across the range has a practical upside: the wash functions, the remote, and the self-cleaning behave the same way from the NEOREST series down to the WASHLET G5A Lite, so choosing between models is a question of how much automation you want, not whose system you prefer. The integrated units are also grouped on their own under TOTO smart toilets.
How to Choose a Smart Toilet
Four decisions settle almost every smart toilet purchase: floor-mounted or wall-hung, the rough-in you actually have, where the outlet is, and how many features you want. Work through them in that order and the shortlist gets short fast.
1. Floor-mounted or wall-hung
Floor-mounted models bolt down over your existing waste line, which is the straightforward swap. The NEOREST NX1, NX2, RS, AS, and LS and the WASHLET G5A and G5A Lite all install this way. The NEOREST WX1 and WX2 and the RP WASHLET+ RW hang from an in-wall carrier with the tank inside the wall, so the floor under the bowl stays clear. That is a framing decision: the RP system takes commercial 2 by 6 framing, with residential 2 by 4 as an option, and its mounting height adjusts from 15 to 19 inches. If the wall is already open, see wall mounted smart toilets.
2. Confirm your rough-in before anything else
Rough-in is the distance from the finished wall to the center of the closet bolts. Roughly 90% of American bathrooms measure 12 inches, and 12 inches is what the floor-mounted models here need. The G5A Lite is 12-inch standard only, and TOTO does not offer a 10-inch NEOREST, so spend five minutes with a tape measure. The toilet rough-in size guide walks through it. If yours comes back at 10 inches, a 12-inch model will not sit correctly. Wall-hung models have no floor rough-in at all.
3. Sort out the outlet
Every smart toilet needs power for the heated seat, the water heater, the sensors, the dryer, and the deodorizer. Plan on a GFCI 120-volt outlet within reach of the toilet. If there is none behind the toilet today, the trade you need is an electrician, not a plumber. Leave clearance too: measure the clear space in front of the bowl and to each side before you order.
4. Decide which features you will actually use
All of these models wash, dry, heat the seat, and deodorize. What separates them is how much automation sits on top. The NEOREST NX2 layers ACTILIGHT, a five-setting dryer, and four-user memory over the standard set. The WASHLET G5A Lite covers the same daily functions with a three-setting dryer lower in the range. The top of the range sits in luxury bidet toilets over $2,000.
5. If a remodel is not on the table
If your bowl is fine and you mainly want the washing and the heated seat, a bidet toilet seat delivers most of the same functions on the toilet you already own, and it comes off again when you move.