Inus R31

Model IST-R31

  • Warm wateryes
  • Needs an outletyes
  • Heated seatyes

A Korean-made tankless value seat that built its reputation on Amazon, the R31 pairs on-demand heated water with a wireless remote, heated seat, bowl night light, and a well-tuned skin sensor. It skips the air dryer - that's the step-up R32's job - which keeps the price down and the profile slim. Inus sells it direct for $369 with frequent trade-in promos, while its Amazon presence now lives under the shared R-series listing.

Approx. price

~$369

Best for Buyers who wipe-then-wash and don't care about air drying but want tankless warmth with a remote

Not sold on Amazon; check the manufacturer's site for current stock.

Specifications

Water heating
Tankless (Instant Heat)
Controls
Wireless Remote
Toilet fit
Elongated only
Power
Needs GFCI outlet within reach
Spray pressure
5 pressure levels
Nozzle
Self-cleaning stainless steel nozzle
Install
under 30 min DIY
Warranty
1-year limited

Features

  • Warm wateryes
  • Heated seatyes
  • Warm air dryerno
  • Wireless remoteyes
  • Night lightyes
  • Deodorizerno
  • Self-cleaning nozzleyes
  • Feminine washyes
  • Korean Tankless Value
  • Wireless Remote
  • No Dryer (By Design)

What owners like

  • +Korean-built tankless system delivers consistent endless warm water - same core tech as seats $200 more
  • +Wireless remote (with user presets) at a price where SmartBidet's SB-2600 makes you twist to a side panel
  • +Skin sensor is unusually well-calibrated - owners note it never sprays unless someone is actually seated
  • +Bowl-illuminating night light makes 3 a.m. visits glasses-free, a feature the SB-2600 skips
  • +Stainless self-cleaning nozzle with auto and manual cleaning cycles resists buildup
  • +Everything is adjustable: pressure, water temp, seat temp, nozzle position, steady vs. oscillating

Common complaints

  • −No air dryer at all - you must buy the R32 (about $300 on Amazon) if you want one, which undercuts the R31's value math
  • −No deodorizer either, so it trails the Alpha JX2's feature list at a similar price
  • −$369 direct price is high for a dryer-less seat; wait for Inus's frequent $100+ promos
  • −Its dedicated Amazon listing has gone dormant - US buyers mostly purchase through theinushome.com now
  • −Elongated only; no round version exists in the R series
  • −1-year warranty and a small US support operation compared to Toto or Coway
  • −Heated seat maxes out mild - cold-bathroom owners wish for a hotter top setting

Questions buyers ask

Why doesn't the R31 have an air dryer?

It's a deliberate omission — Inus positions the step-up R32 as the dryer model. The R31 is built for people who wash then finish with a quick pat of paper, which keeps the price down. If you specifically want air drying, buy the R32 instead of regretting the R31.

Does the warm water stay warm for long washes?

Yes. The R31 uses a Korean-built tankless heating system that produces endless on-demand warm water — the same core technology found in seats $200 more expensive. There's no reservoir to deplete, so temperature stays consistent no matter the wash length.

Where can I actually buy one? The Amazon listing looks dead.

The dedicated Amazon listing has gone dormant, so most US buyers now purchase directly from theinushome.com. That's also where Inus runs frequent promos of $100 or more off the $369 direct price — it's worth waiting for one rather than paying full freight for a dryer-less seat.

Will it spray if nothing is sitting on it?

No — and the R31's skin sensor is unusually well-calibrated for the class. Owners consistently note it never fires unless someone is actually seated, which matters for households with curious kids poking at the remote.

Is there a round-bowl version?

No, the R series is elongated-only. Round-toilet households need to look at brands like Kohler (PureWash E525) or Bemis (Renew Wash) that sell both fits.

Compare the Inus R31

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