Mid-Florida Heating & Air serves Gainesville, FL

Humidifiers in Florida

Use and Care of Home Humidifiers

Humidifiers are commonly used in homes to relieve the physical discomforts of dry nose, throat, lips, and skin. The moisture they add to dry air also helps alleviate common nuisances brought on by winter heating, such as static electricity, peeling wallpaper, and cracks in paint and furniture. However, excess moisture can encourage the growth of biological organisms in the home. These organisms include dust mites, which are microscopic animals that produce materials causing allergic reactions to household dust, and molds.

Recent studies by the Environmental Protection Agency (EPA) and the Consumer Product Safety Commission (CPSC) have shown that ultrasonic and impeller (or "cool mist") humidifiers can disperse materials, such as microorganisms and minerals, from their water tanks into indoor air. At present, only limited information is available on the growth of microorganisms and the dispersal of microorganisms and minerals by home humidifiers.

Proper care and cleaning of ultrasonic and impeller humidifiers are important for reducing potential exposures to microorganisms, such as bacteria and molds. Microorganisms often grow in humidifiers which are equipped with tanks containing standing water. Breathing mist containing these pollutants has been implicated as causing a certain type of inflammation of the lungs.

The Federal government has not concluded that the dispersal of minerals by home humidifiers poses a serious health risk. Nevertheless, using water with lower mineral content will reduce exposures to these materials.

The young, the elderly, and those people with lung diseases or respiratory allergies may be particularly susceptible to certain types of airborne pollutants. However, if you follow the recommendations for the use and care of home humidifiers provided in this fact sheet, the potential for dispersal of microorganisms and minerals from your humidifier should be reduced.

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Can I Use Tap Water in My Ultrasonic or Impeller Humidifier?

The Federal government has not concluded that using tap water in ultrasonic or impeller humidifiers poses a serious health risk. However, researchers have documented that these humidifiers are very efficient at dispersing minerals in tap water into the air. In addition, some consumers are bothered by a "white dust" that may appear on surfaces during use of these devices. Most importantly, minerals in tap water may increase the development of crusty deposits, or scale, in humidifiers. Scale can be a breeding ground for microorganisms.

Retarding the growth of scale is the most compelling reason to find alternatives to tap water. For this reason, or if white dust is a problem or you wish to minimize your exposure to minerals in the tap water as a matter of prudence, you should either:

  1. Use bottled water labelled "distilled." While distilled water still contains some mineral content, it will likely contain lower mineral content than most tap water. Distillation is the most effective method for removing minerals from water.

    Two additional demineralization processes, deionization and reverse osmosis, remove most of the minerals from water, but are generally less effective than distillation. Water demineralized by these two processes would, on the average, be expected to contain a higher mineral content than distilled waters. "Purified" water may be produced by any of these three or other similar processes.

    Be aware, however, that not all bottled water is produced using demineralization processes. Bottled waters labelled "spring", "artesian" or "mineral" have not been treated to remove mineral content.

  2. Consider using demineralization cartridges, cassettes, or filters if supplied or recommended for use with your humidifier

    Be aware, however, that the ability of these devices to remove minerals may vary widely. Further research is needed to determine how well, and how long, these devices work. Watch for the appearance of "white dust," which would indicate that minerals are not being removed.

    Also, in areas of the country where the mineral content in the tap water is high, using distilled water may be less expensive than cartridges, cassettes, or filters.

Types of Humidifiers and Associated Pollutants

Console humidifiers are encased in cabinets which are designed for floor use. Portable humidifiers are smaller and more readily moved. Central humidifiers are built into heating and central air-conditioning systems, and humidify the whole house.

The two types of humidifiers which generally appear to produce the greatest dispersions of both microorganisms and minerals are:

Two additional types of humidifiers can allow for growth of micro-organisms if they are equipped with a tank that holds standing water, but generally disperse less, if any, of these pollutants into the air. These are:

Note: Steam vaporizer and evaporative humidifiers are not expected to disperse substantial amounts of minerals. A steam vaporizer tested by EPA did not disperse measurable amounts of minerals; evaporative humidifiers have not been tested by EPA for mineral dispersal.

Recommendations for Use and Care

It is important to use a humidifier only when conditions require it, to use the correct moisture setting for existing conditions, and to clean it thoroughly.

The possible health effects resulting from the dispersal of microorganisms and minerals by home humidifiers are not fully understood. Meanwhile, it may be prudent to reduce the potential for personal exposures to these materials by taking the following precautions, particularly when using ultrasonic and impeller humidifiers.

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Serving FL including the Greater Gainesville area
Our Florida Service Area
Cities in Alachua County, FL
Alachua
Archer
Earleton
Gainesville
Hawthorne
High Springs
Micanopy
Newberry
Waldo

Cities in Bradford County, FL
Brooker
Hampton
Starke

Cities in Citrus County, FL
Beverly Hills
Crystal River
Dunnellon
Hernando

Cities in Clay County, FL
Fleming Island
Green Cove Springs
Keystone Heights
Middleburg
Orange Park

Cities in Columbia County, FL
Fort White
Lake City

Cities in Gilchrist County, FL
Bell
Trenton

Cities in Lake County, FL
Lady Lake
Leesburg
Umatilla

Cities in Levy County, FL
Bronson
Cedar Key
Chiefland
Inglis
Morriston
Williston

Cities in Marion County, FL
Anthony
Belleview
Citra
Dunnellon
Fort Mc Coy
Ocala
Ocklawaha
Reddick
Silver Springs
Summerfield
Weirsdale

Cities in Putnam County, FL
Crescent City
East Palatka
Florahome
Georgetown
Interlachen
Melrose
Palatka
Pomona Park
San Mateo
Satsuma
Welaka

Cities in Sumter County, FL
Lake Panasoffkee
Oxford
The Villages

Cities in Union County, FL
Raiford

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