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WHEN DO WE NEED A DEHUMIDIFIER, A HUMIDIFIER OR AN AIR-CONDITIONER

1. When ambient conditions are cool and wet, we need a dehumidifier to reduce the dampness; the air  feel like "raw" and damp.

2. When ambient air is hot and humid, a dehumidifier is needed, especially during physical activity like work or sports who generates body fluids.

3. When the weather is cold and dry, we need a humidifier to improve our breathing air quality; we must increase the content of relative moisture in the air as close as possible to 50%.

4. In case of dry hot weather, we also need a humidifier.

5. A dehumidifier is used to regulate (lower) the level of relative humidity while an air conditioner is used to lower the ambient air temperature. An air conditioner also a dehumidification function, but one cannot use an air conditioner in a room already cool since it would lower the temperature further.

6. A humidifier is used to raise the relative humidity, in addition the "adiabatic" effect ( cooling effect when water evaporates) of an evaporative type humidifier will also lower the room temperature by a few degrees.

7. Heating a room allows ambient air to absorb some moisture. One must then evacuate the moist air to definitively rid of the dampness. A dehumidifier allows to condensate moisture without loosing warmed-up air, this generates heating cost savings.

8. A heating system does not regulate the relative humidity level; only a dehumidifier equipped with a humidistat can regulate the humidity level. The comfort zone is located at approximately 50% Relative Humidity. Check your R.H. level with a Thermo-Hygrometer .

9. The ambient humidity level depends on several factors - local geographical conditions ( near a body of water, ocean, river...) rainy area, ground drainage and general ground conditions : sand, mountains, types of constructions etc..
In area of cold temperatures, (less than 5%) the humidity level becomes low and disappears somewhat when water freezes, less than 0°C (ice).

10. Excess humidity is bad for many equipments as it creates inflating of wood, softening of cartons, oxidation (rust) of metals, rot, mildew, smells etc...also health problems can follow...Humidity helps the development of acaroids...

11. A dehumidifier must be preferably located in the coolest area of the house (room); the dehumidifier is often located in the entrance area of the home, office, or on the lower floor in the basement, den or cellar. This is often where the dampness level is the highest. Leave doors open to allow permanent transfer of humid air towards the dehumidifier.

12. Humid air "travels" always from the warmest to the coolest area....


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