Kohler PureWash E590 Review: Comfort First, Pressure Second

What the E590 packs in

Kohler builds the E590 around comfort and self-maintenance rather than raw power, and the spec sheet shows it.

The seat is the headline: a Grip-Tight heated seat with five adjustable temperature settings, fed by a hybrid heater that provides continuously heated water for consistent comfort. The wash is tunable — you choose oscillating or pulsating spray, as well as a warm-air drying system — and maintenance is automated with a self-cleaning function using UV light to clean wand surfaces, and LED lighting illuminates the bowl as a nightlight. Kohler adds automatic deodorization for odor control, a warm-air drying system with adjustable temperature settings, and an ergonomically designed side panel offers larger control buttons for comfortable control.

The hybrid heater is the comfort differentiator that separates the better electric bidet seats: rather than a fixed reservoir that runs cold, it keeps the water continuously warm. One quirk to know up front — the E590 heats its own water and does not tap your home's hot line, so the warmth is on-board rather than plumbed. The table maps the feature set to what each part does.

What owners love

The praise clusters where Kohler aimed it: the warmth, the gentleness, and a couple of thoughtful touches.

The seat wins first — owners love that the seat is always warm — and the spray earns repeat praise for its range: from a gentle cascade to a targeted power wash, it caters to every cleansing preference, while the pulsating mode is a nice touch, adding a rhythmic massage element. Install recurs as an easy job, and one detail surprised a reviewer: door flaps protecting both the fan and nozzle from splatter. An owner who upgraded to a warm-water, warm-dryer, heated-seat, nightlight model simply reports loving it.

"...the seat is always warm" — the comfort owners rank first across the reviews, and the single feature Kohler clearly designed the E590 around. Several pair it with the pulsating massage mode and the bowl-lighting nightlight as the daily touches they would not give up.

Where it's weak: pressure and the dryer

The skip case is specific and consistent, and it starts with the one thing a wash has to do well.

Pressure is the headline weakness. One owner is blunt: this is by far the weakest bidet of any that they have tried, and the cause is structural — compared to the non-electric seats that run on house pressure, an electric-pump seat like the E590 simply pushes less. The dryer disappoints the same way: the breeze is so light that it does not actually do anything to dry you off. Comfort is the third note — the seat is small and uncomfortable for some, a common bidet-seat gripe that points buyers toward an elongated bowl.

Two practical notes close it out. the bidet does not have a connection to your hot water source, so its warmth is on-board only, and toilet seats are not returnable to Kohler if opened or outside of original packaging — so measure your bowl before you commit.

Our verdict, and the Kohler family

The E590 earns a recommendation for one buyer: someone who prizes an always-warm seat and a gentle, tunable wash over raw pressure, and who wants Kohler's name and self-cleaning conveniences at a mid-premium price.

It is the wrong seat if you want a powerful jet or a dryer that truly dries — those are its consistent misses, and a higher-pressure seat or a TOTO flagship answers them more convincingly.

Within the Kohler family, and the rivals

Kohler gives you three steps. the cheaper Kohler E580 rates 4.4 across 90 reviews and matches the E590's score for less — losing only the heated seat — while the step-up Kohler E750 rates lower at 4.2 across 229 reviews despite costing far more, and the Kohler E880 is the highest-rated sibling at 4.8 across 30 reviews. So the E590 is the value-comfort sweet spot of the line rather than its peak. For ultimate comfort a commenter points instead to an integrated unit like the Kohler Numi 2.0, which avoids the tank hump a seat-style bidet leaves behind.

The E590's ratings hold up elsewhere — at Omega Faucet it lists with a 4.4 rating across 109 reviews, close to its verified average rating of 4.46. Shoppers weighing comfort against power should compare Kohler bidet seats against the stronger wash of TOTO bidet seats and the value of Brondell bidet seats — our TOTO WASHLET S5 review covers the higher-pressure side, the mid-range American Standard Advanced Clean 2.0 is a direct rival, and the best bidet seats roundup ranks them together.