Most indoor comfort and building guidelines recommend 30%–60% relative humidity, so 57% sits near the upper comfortable range. Mold risk usually increases above ~65–70% if it stays there constantly.
Indoor plants release moisture through a process called "transpiration," where water evaporates from the leaves. With 15 pothos, they do add some moisture to the air, but your airflow setup balances it.
Even 20–25 houseplants usually raise humidity by only ~2–5% in a small room, especially with air circulation.
That means your 57% probably would only drop to ~52–55% without plants, which is still similar.
FACT: Plants sometimes mentioned online as “dehumidifying” only absorb tiny amounts of water compared with the moisture already in the air.
However, some plants are often suggested because they don’t add much humidity and tolerate humid environments well:
Plants that won’t raise humidity much
- Snake Plant -very low transpiration, drought tolerant
- ZZ Plant – thick leaves store water, releases little moisture
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| Photo by: Thành Đỗ |
- Aloe Vera – succulent, minimal water release
- Cactus – extremely low transpiration
These won’t dehumidify, but they won’t increase humidity much either, which helps keep the room stable.
What actually lowers humidity in a condo
- Air circulation (your air circulator already helps a lot)
- Opening windows periodically: Open windows for 10–15 min daily to exchange humid air.
- Using the exhaust fan when cooking
- Air conditioning (AC naturally removes moisture)
- A small dehumidifier if humidity ever goes above ~65%
- Sun your mattress or pillows occasionally.
To lower humidity by even 5–10% using plants, you would need dozens or hundreds of plants, which would actually increase humidity first because of transpiration.
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