Editing Humidifier (section)

===Prevention of low indoor humidity===
Low humidity may occur in hot, dry [[desert climate]]s, or indoors in artificially heated spaces. In winter, especially when cold outside air is heated indoors, the humidity may drop to as low as 10–20%. A relative humidity of 30% to 50% is recommended for most homes.<ref name="cpsc.gov">{{cite web |url=https://www.cpsc.gov/safety-education/safety-guides/home/the-inside-story-a-guide-to-indoor-air-quality/ |title=The Inside Story: A Guide to Indoor Air Quality |publisher=[[U.S. Consumer Product Safety Commission]] |archive-url=https://web.archive.org/web/20210322041034/https://www.cpsc.gov/safety-education/safety-guides/home/the-inside-story-a-guide-to-indoor-air-quality/ |archive-date=22 March 2021 |url-status=live}}</ref>

====Health treatment====
* Prevention of dermatitis: Low humidity can cause adverse health effects and may cause [[atopic dermatitis]],<ref>{{cite journal |last1=Engebretsen |first1=KA |last2=Johansen |first2=JD |last3=Kezic |first3=S |last4=Linneberg |first4=A |last5=Thyssen |first5=JP |title=The effect of environmental humidity and temperature on skin barrier function and dermatitis. |journal=Journal of the European Academy of Dermatology and Venereology |date=February 2016 |volume=30 |issue=2 |pages=223–49 |doi=10.1111/jdv.13301 |pmid=26449379|s2cid=12378072 |doi-access=free }}</ref> and [[seborrhoeic dermatitis]].<ref>{{cite journal |last1=Araya |first1=M |last2=Kulthanan |first2=K |last3=Jiamton |first3=S |title=Clinical Characteristics and Quality of Life of Seborrheic Dermatitis Patients in a Tropical Country. |journal=Indian Journal of Dermatology |date=September 2015 |volume=60 |issue=5 |pages=519 |doi=10.4103/0019-5154.164410 |pmid=26538714|pmc=4601435 |doi-access=free }}</ref>
** [[Management of hair loss#Humidifier|Management of hair loss]]: Commonly, patients with [[seborrhoeic dermatitis]] experience mild redness, scaly skin lesions and in some cases [[hair loss]].<ref>{{cite web|url=http://www.mamashealth.com/skin/seb.asp|title=What is Seborrheic Dermatitis?|access-date=June 11, 2010|url-status=live|archive-url=https://web.archive.org/web/20100420023503/http://www.mamashealth.com/skin/seb.asp|archive-date=April 20, 2010}}</ref>
* Prevention of dry [[mucous membrane]]s and [[cough]]: By drying out mucous membranes such as the lining of the nose and throat, it may also lead to a snoring problem, and can cause [[respiratory distress]].<ref>{{Cite journal|last2=Juvonen|first2=R.|last3=Jokelainen|first3=J.|last4=Harju|first4=T. H.|last5=Peitso|first5=A.|last6=Bloigu|first6=A.|last7=Silvennoinen-Kassinen|first7=S.|last8=Leinonen|first8=M.|last9=Hassi|first9=J.|year=2009|title=Cold temperature and low humidity are associated with increased occurrence of respiratory tract infections|journal=Respiratory Medicine|volume=103|issue=3|pages=456–62|doi=10.1016/j.rmed.2008.09.011|pmid=18977127|last1=Mäkinen|first1=T. M.|doi-access=free}}</ref>
* Prevention of [[dry eye syndrome]].
* Improved [[apparent temperature]]: The [[heat index]] and [[humidex]] measure the effect of humidity on the perception of temperatures above {{convert|+27|C|F}}. In humid conditions, the air feels much hotter, because less [[perspiration]] evaporates from the skin.

====Improved climate for material====
Low humidity can affect wooden furniture, causing shrinkage and loose joints or cracking of pieces.<ref>{{Cite book|url=https://books.google.com/books?id=xfB99Kf38MwC&q=low+humidity+wooden+furniture&pg=PA490|title=Home Comforts: The Art and Science of Keeping House|last=Mendelson|first=Cheryl|date=17 May 2005|publisher=Simon and Schuster|isbn=9780743272865|language=en}}</ref> Books, papers, and artworks may shrink or warp and become brittle in very low humidity.<ref>{{Cite book|url=https://books.google.com/books?id=e68FaiCRjIoC&q=low+humidity+books+artwork&pg=PA118|title=Disaster Response and Planning for Libraries|last=Kahn|first=Miriam B.|date=1 January 2012|publisher=American Library Association|isbn=9780838911518|language=en}}</ref>

In addition, [[static electricity]] may become a problem in conditions of low humidity, destroying semiconductor devices, causing [[static cling]] of textiles, and causing dust and small particles to stick stubbornly to electrically charged surfaces.<ref>{{Cite book|url=https://books.google.com/books?id=mkPYKXcwsrAC&q=static+electricity+humidity&pg=PA34|title=Secret of Electricity|last=Elsersawi|first=Amin|date=2012-06-15|publisher=AuthorHouse|isbn=9781477216200|language=en}}</ref>