Ans: In a domestic scenario, a dehumidifier is needed to

1. Remove excess moisture to protect paintings and electronic equipment
2. Stop musty odor from clothes and carpets
3. Prevent development of fuzzy black and green dots on furnishing and

 In an industrial scenario, dehumidifiers are used for

1. Maintain the product integrity of powdery materials in the Food/ Pharma industry
2. In Hospitals, it is used to maintain humidity in Cath Labs
3. In data storage, where humidity can cause irreparable damage - a dehumidifier plays a critical role

Ans: While you cannot affect the humidity outdoors, you can control it within your home / industry to derive benefits

• Proper ventilation is very important when dealing with high humidity. Air your home frequently, especially the rooms you spend most of your time in (like bedrooms).
• While air conditioners can remove moisture from the air to a certain degree (and still others have built-in dehumidification capacities), dehumidifiers are designed specifically for this task. You can use them to quickly reduce moisture level within a given area.

If you use a humidity gauge (also known as a hygrometer), you can constantly monitor the humidity within your home, allowing you to see if it is too high or too low and then take appropriate actions.

Ans: A dehumidifier removes moisture from the air, thus lowering the humidity. This is achieved by condensing water onto a cold surface – that is technically referred to as a condenser. This is a principle that we have all observed: When you have an ice cold drink on a hot day, you notice water collecting on the outside of the glass (Remember?)

Dehumidifiers also work similarly, but some minor differences to improve the effectiveness. A fan is used to speed up the process. It blows warm air onto cold metal coils (condenser) and the resulting water drips into a bucket. The resulting cold air is then passed over warm coils to bring it back to room temperature.

For a clearer picture, please look at the illustrated diagram -

1. Warm, moist air
2. Electric fan
3. Cold pipes/ Condenser.
4. Hot pipes/ Evaporator
5. Warm, dry air
6. The moisture gets condensed into water
7. Float cock & Bucket arrangement
8. Compressor

Ans: De-humidifiers with 2 years warranty: 3000 satisfied customers. Dehumidifiers are rated by the maximum amount of humidity that they will remove from the air in a 24 hour period. For example, a 20 liters dehumidifier is rated to remove 20 liters of moisture from the air in a 24 hour period.

Ans: 

Know your area  - Larger spaces need dehumidifiers with a larger capacity.

Know your humidity level - The more humid is your air, the more powerful dehumidifier you need.

Ans: There two kinds of dehumidifiers are -

Heat Pump Dehumidifiers work through the use of a heat pump, fan and heat exchange coil to get rid of moisture. Basically, it applied the Condensation Drying approach – it takes in input air via the fan, through the heat exchange coil. The coil is at near-freezing temperature. The moisture condenses and another heat coil reheats the air and it exhausts it back into the room; this continues cyclically. The capacity of dehumidification in portable dehumidifiers varies from 10 litres to 90 litres.

Most portable dehumidifiers work on this principle of condensation drying. Portable dehumidifiers are a better proposition since it involves lesser capital expenditure besides giving the user the flexibility to add / subtract units as per existing conditions.

Chemical Absorbent Dehumidifiers contain silica gel, a desiccant-type adsorbent. In this method, gel is heated and placed on a wheel; a separate loop dries the gel and exhausts the damp air through a vent outside. In terms of use, these are reminiscent of the little packets of ‘stuff’ that come inside new thermal water bottles.

However, they have the drawback since they heat up the room by almost 15 degrees over and above the inlet air temperature. This requires further air conditioning to bring the temperature to normal levels, and this represents a significant energy cost. That makes this suitable to only very large volumes.

Ans: Dehumidifiers work best when you close all of the windows and doors to ensure that space is tighter. In this way, the dehumidifier will respond more effectively. If you are only letting in more humid air, this is wasteful. Ensure there is nothing obstructing the rear or front grills and coils – leave at least 12 inches of space around the entire unit.