Both devices are often on the same shelf in the store and are regularly confused with each other. Yet, they perform very different functions. Below, we explain the difference so that you can make an informed choice.
What does an air purifier do?
An air purifier draws in air and passes it through one or more filters, usually a pre-filter, a HEPA filter, and sometimes an activated carbon filter. A HEPA 13 filter captures up to 99.97% of particulate matter, pollen, bacteria, viruses, and microplastics from the air that passes through it. An air purifier is therefore focused on particles and odors in the air, not on moisture levels.
What does a dehumidifier do?
A dehumidifier removes moisture from the air and collects it in a reservoir or drains it via a hose. This device is focused on reducing humidity, which helps with window condensation, musty odors, and the breeding ground for mold. A dehumidifier does not filter particulate matter, pollen, or other particles from the air.
Which problem do you have?
Do you notice that you are sneezing, have irritated eyes, or suffer from household dust, pet hair, or a musty smoke odor? Then this points more to a problem that an air purifier can help reduce. Do you see fogged windows, does the air feel oppressively humid, or do you smell a musty odor that keeps returning? Then the problem is likely high humidity, which a dehumidifier can help with.
Can you use them together?
Yes, in some situations the devices solve different parts of the same problem. For example, a damp basement with a musty odor can benefit from a dehumidifier to lower the moisture, while an air purifier in the living room helps primarily with dust and pollen coming in from outside. When using them in combination, ensure both devices have enough space around them for proper air circulation.
In summary
- Air purifier: focuses on particulate matter, pollen, bacteria, viruses, and odors via a HEPA filter.
- Dehumidifier: focuses on high humidity, condensation, and the breeding ground for mold.
- Both devices solve a different problem and can easily work alongside each other in practice.
Our advice
Are you unsure whether you are suffering from particles in the air or from moisture? First look at the specific issues in your home: sneezing and dust point to the Dynter AirPure Plus PA244 air purifier (with HEPA 13 filter, viewable on the product page for the PA244), while fogged windows and a musty odor are more indicative of the Dynter AirPure DH251 dehumidifier, viewable on the product page for the DH251.