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About the scoresThe scores are calculated mechanically by applying the criteria table at the end of the page to figures published on the manufacturers' official pages and manuals (and on retail or comparison pages where an official figure was not available). We call it the "Spec Score".
Spec Score #4Desiccant type (clothes-drying dehumidifier)
Best if you also dry laundry indoors in cold months
1.50★★☆☆☆Spec Score (out of 5)
See on Amazon¥14,270See on Rakuten¥12,800Price as of 2026-09-17 · affiliate link · Opens the shop's site
We could not open the Iris Ohyama official site from our environment (access denied), so the figures for this product come from retail and comparison pages that match the exact model number IJD-P20-H.
Score Breakdown
Specs
| Method | Desiccant (zeolite) type |
|---|---|
| Rated capacity | 2.4 / 2.2 L/day (50 / 60 Hz, 20°C and 60% RH) |
| Rated area | Wood-frame 3 tatami mats, prefab 5 / 4, concrete 6 (50 / 60 Hz) |
| Tank capacity | about 2.0 L (auto-stops when full) |
| Power consumption | 300 W |
| Operating noise | about 39 dB (per the Amazon listing) |
| Clothes-drying time | 182 min (JEMA-HD090:2017) |
| Extra features | Clothes drying, up/down louver, off-timer 4 / 8 h, forgotten-off protection, tip-over safety device |
| Size / weight | W322 × D211 × H464 mm, about 5.3 kg |
🙂 Good points
- The only desiccant unit of the four (it dehumidifies with a heater)
- About 5.3 kg and W32.2 × D21.1 × H46.4 cm, easy to carry
- Dries 2 kg of laundry in about 182 minutes (JEMA-HD090:2017 test value)
🙁 Things to note
- Rated 2.4 / 2.2 L/day (50 / 60 Hz), and the rated area is only up to 6 tatami mats in concrete
- It draws 300 W; the energy needed per liter removed is the highest of the four (about 3,270 Wh)
Sources
Amazon [retail page] ／ Cainz [retail page] ／ Kakaku.com [comparison site]
Scores are calculated only from specs published on official and retail pages.