Undoubtedly, humidifiers perform important functions in the home by regulating the relative humidity—particularly during winter. Some of the benefits of humidification include: prevention and alleviation of colds, dry nasal membranes, dry and itchy skin, allergies, flu and asthma. However, while humidifiers are beneficial, improper maintenance can lead to harmful health effects and the following are some tips on proper humidifier maintenance.
Always Use Distilled Water: A common problem with humidifiers (particularly cool mist humidifiers), is accumulation of minerals. Tap water is rich in mineral deposits and is generally not encouraged for use in humidifiers. The use of tap water and mineralized water generally leads to formation of deposits and scales that can encourage the growth of harmful microbes. This is why the EPA recommends the use of distilled water in humidifiers.
Refill Humidifiers Daily: To discourage harmful effects, it is advisable to change the water in your humidifier every day. To do this, the humidifier must be unplugged, emptied, and all surfaces wiped dry before refilling with distilled water. This will discourage and reduce the growth of bacteria and other microbes to a minimal level. Additionally, the whole unit should be cleaned every third day with a scrubber to remove dust and mineral deposits.
Change Dirty or Worn Filters: Dirty and worn filters constitute a nuisance to the health by serving as breeding sites for microorganisms. Thus, a filter change is recommended whenever the current filter becomes dirty or worn. Manufacturers typically recommend when to change humidifier filters.
Disinfect the Tank Regularly: You should carry out disinfection of your unit from time to time. Follow the manufacturer’s instructions on the cleaning agents and disinfectants to use. Some of the commonly recommended agents include chlorine bleach and hydrogen peroxide. After disinfection, wash the tank thoroughly to prevent distribution and inhalation of the chemical agents.
Store Humidifier Properly: During periods when the humidifier will not be used frequently (such as when you are going on a trip or at the termination of the humidifying season), carry out a thorough cleaning of the unit and dispose of used filters. Also, dry the unit properly and store in a location free from dust and moisture.
Stay within the Optimal Humidity Level: When using your unit, never exceed the optimal relative humidity level conducive for human health and comfort. The optimal range is between 35 and 50% with 45% being the recommended level. Humidifying above 50% encourages the growth of microbes in the home.
Keep the Surroundings Dry: The area around the humidifier should be kept dry at all times. Thus, absorbent items such as rugs, carpets and curtains around the area where the humidifier is sited should not be allowed to get damp. Sometimes, this may require reducing the output level of the humidifier or reducing the frequency of use.
The points discussed above generally apply to portable units. For whole house humidifiers such as central, console and forced-air or furnace units, the manufacturer’s instructions should be adhered to or consult a specialist.