Comparison: Dehumidifier vs Heater

Dehumidifier vs heater
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In short, heater is an appliance that can blow out warm air. It has fast and good results, so it is common heating equipment in winter.

Many people will have this question: Since the heater blows hot air, does it also have a certain dehumidification function and can be used as a dehumidifier? Today we will discuss this issue.

The effect of humidity on people

Higher humidity makes people feel indoors warmer than they actually are. When the relative dry humidity is above 90%, 26℃ will make people feel 31℃, and the humidity will greatly affect health and comfort.

When the humidity is too high, the concentration of thyroxine and adrenaline in the body is relatively reduced, the cells will become “lazy”, and people will feel listless and sluggish. Working and living in places with high humidity (such as mountains, islands, basements) for a long time are also prone to rheumatism, rheumatoid arthritis and other wet paralysis.

What is the difference between a heater and a dehumidifier

They have different purposes: heater used to increase the temperature, but dehumidifier used to adjust the humidity, so the principles and components of them are different.



Heater is usually heated by PTC, the fan blows the heat out to achieve the heating effect. Its components included: fans, PTC heaters, motors, etc. to achieve the heating effect; While dehumidifier uses the principle of air cooling to condense the water vapor into liquid and discharge it, and then exhaust to achieve dehumidification effect. Its components included: compressors, evaporators, condensers, fans, etc., which is circulating system equipment.

Who is the best choice for dehumidification, dehumidifier or heater?

Heater is actually equivalent to separating the heat function of the air conditioner (place it on the ground) so that the hot air blows from the relatively lower ground to the surroundings. Because the hot air rises upward, when the air conditioner is heating, due to its high installation position, the hot air blown out is mainly concentrated in the upper part of the room, causing waste. The heater is different, its hot air can be sensed by the human body for the first time, so it is quite practical.

But heater can’t dehumidify. Air has a feature called dew point temperature. It means the temperature point at which condensation occurs in the air under the current air state, and the temperature at which condensation begins to appear. Refrigeration can dehumidify because the air in the environment (in contact with the temperature of the refrigerant) is lower than its dew point temperature, so that the water in the air condenses out and achieves dehumidification. The heater can only heat the air and can’t condense the moisture in the air, so heater can’t dehumidify.

Dehumidifier for anti-allergy


Dehumidifier is the best dehumidification choice for your home. It sucks in moist air through the fan, condenses the air moisture into water droplets through the heat exchange system, and then discharges the treated dry air out to reduce the relative humidity through air circulation.

Air conditioner dehumidification

Most air conditioners have a dehumidification function. In addition, air conditioners are already a must-have household appliance in the home, so for a certain reason, an air conditioner is the most convenient dehumidification equipment. Whether cooling or heating, air conditioner can adjust the relative humidity in the room. For some air conditioners with independent dehumidification functions, the dehumidification effect will be better than ordinary air conditioners.

However, do you ensure no need for a dehumidifier if you own an air conditioner?

Compared with dehumidifier, the dehumidification capacity of air conditioner is very small, not only the dehumidification speed is slow, but also the dehumidification effect is far from a dehumidifier.

What’s more, the air conditioner is relatively fixed, which means one air conditioner can’t dehumidify all rooms in the house. Therefore, its function is very limited, only suitable for indoor relative humidity is not large, and dehumidification work in a small range.

AC working no good

Air conditioner

If the indoor temperature is not so high but the humidity is high, it’s not a good choice to dehumidify this kind of room by air conditioner, because people will feel colder and colder, and is extremely uncomfortable.

Even if the air conditioner has an independent function of dehumidification, the compressor will still be running at high speed for a long time. This virtually increases the load on the air-conditioning compressor. The power consumption of air conditioners is relatively large, and long-term work not only wastes power, but also easily causes compressor failures. Long-term use in this way will shorten the lifespan of the air conditioner compressor.

Therefore,  better to use a dehumidifier for indoor dehumidification.


We know what is the best choice for room dehumidification, that is dehumidifier. Heater is  better for heating the room, matching dehumidifier and heater can bring you a comfortable winter,isn’t it?

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