Best Heated Bidet Seat: Brondell, Bio Bidet and TOTO Compared

Yes. Any bidet seat with a heated seat, warm water or a dryer plugs into a standard 120 V outlet. The Brondell Swash SE400 ships with a 4 ft cord, so the outlet should be within about 4 ft of the toilet. The National Electrical Code requires GFCI protection on bathroom receptacles, so use a GFCI outlet and not an extension cord.

Measure from the center point between the two seat mounting bolts to the front outer edge of the bowl. About 16.5 inches means a round bowl and about 18.5 inches means elongated. Bidet seats are sold in both shapes, so order the one that matches.

Yes, most people install one without a plumber. You shut off the toilet supply, fit the included T-adapter between the supply line and the tank, swap the seat, and plug it in. Brondell rates the SE400 at under an hour and TOTO and Bio Bidet both describe their seats as DIY installs.

It is worth it if you want warm water, a warm seat or a dryer, because a non-electric attachment uses only the cold supply line. A non-electric unit costs less and needs no outlet. If your bathroom has no outlet near the toilet, a non-electric attachment is the practical choice.

A tank bidet heats a small reservoir, so the wash cools once that water is used. A continuous (instant) heater warms the water as it flows, so the temperature holds for the whole wash. The Bio Bidet Bliss BB1000 lists continuous warm water.

It can replace most of it, but many people still use a square or two to pat dry because air drying takes longer than wiping. The Brondell SE400 and Bio Bidet BB1000 both include a warm air dryer. The TOTO WASHLET A2 does not list one.

A wireless remote mounts on the wall and keeps the seat profile clean, and it is easier to reach for some users. Side-arm controls are attached to the seat, so they can never get lost. The Bio Bidet BB1000 uses a remote; the Brondell SE400 and TOTO A2 use side panels.

Usually, as long as the bowl shape matches and the seat bolts are in the standard position. Check that there is room for the T-adapter between the supply valve and the tank inlet, and that the seat's rear housing clears the tank. Makers publish seat dimensions, for example 20.9 x 18.5 x 6.1 inches for the Brondell SE400.

Yes, on these models the nozzle retracts and is rinsed automatically. The Brondell SE400 runs a self-clean cycle before and after use, and the TOTO A2 cleans its wand inside and out before and after each use. Wipe the seat and nozzle housing during your normal toilet cleaning.

They draw power mainly to keep the seat and water warm, so the eco or energy-saving mode matters most. The Brondell SE400 has an optional eco mode, and turning the seat heat off in summer also lowers use. Our cost-to-run calculator turns any wattage into a yearly cost at your state's electricity rate.