{"id":4278,"date":"2023-09-25T14:18:26","date_gmt":"2023-09-25T21:18:26","guid":{"rendered":"https:\/\/www.appliancepartspros.com\/b\/?p=4278"},"modified":"2023-10-18T09:35:06","modified_gmt":"2023-10-18T16:35:06","slug":"how-dehumidifiers-work-comprehensive-guide","status":"publish","type":"post","link":"https:\/\/www.appliancepartspros.com\/c\/how-dehumidifiers-work-comprehensive-guide\/","title":{"rendered":"How Dehumidifiers Work: A Comprehensive Guide"},"content":{"rendered":"<div  class='avia-image-container  av-styling-    avia-builder-el-0  el_before_av_team_member  avia-builder-el-first  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img fetchpriority=\"high\" fetchpriority=\"high\" decoding=\"async\" class='wp-image-4281 avia-img-lazy-loading-not-4281 avia_image' src=\"https:\/\/www.appliancepartspros.com\/c\/wp-content\/uploads\/2023\/09\/tracybeard_A_dehumidifier_stands_in_a_corner_of_a_cozy_living_r_a43a7e30-5e43-4988-88b9-ef4f44026e1b-1021x430.png\" alt='a dehumidifier in a cozy living room' title='a dehumidifier in a cozy living room' height=\"430\" width=\"1021\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<section  class='avia-team-member   avia-builder-el-1  el_after_av_image  el_before_av_textblock '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\" ><h3 class='team-member-name'    itemprop=\"name\" >Samantha Bullington<\/h3><div class='team-member-job-title '   itemprop=\"jobTitle\" >September 25, 2023<\/div><span class='hidden team-member-affiliation'  itemprop=\"affiliation\" >AppliancePartsPros Blog<\/span><\/section>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><p><span style=\"font-weight: 400;\">High humidity levels can make your home feel sticky and uncomfortable. Mold and mildew may start growing, causing potential health issues. This is where a dehumidifier comes in handy. Dehumidifiers are appliances designed to reduce humidity in a single room or throughout a home. Let&#8217;s take an in-depth look at how dehumidifiers work, the main components, and operating principles.<\/span><\/p>\n\n<h2>What Does A Dehumidifier Do?<\/h2>\n<p>A dehumidifier plays a crucial role in maintaining the optimal humidity level in your home, ensuring it is neither too high nor too low. When the humidity level rises, it can lead to a multitude of problems, one of which is the proliferation of dust mites. These microscopic creatures thrive in high humidity environments and can lead to allergies and other health issues. Moreover, high humidity in your home can exacerbate respiratory conditions, create unpleasant odors, and damage the structural integrity of your home. A dehumidifier works efficiently to extract excess moisture from the air, reducing the humidity level and mitigating the side effects associated with high humidity. By maintaining a balanced humidity level, it curtails the growth of dust mites, molds, and other allergens, promoting a healthier and more comfortable living environment.<\/p>\n<h2><strong>Benefits of using a dehumidifier<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Before jumping into the mechanics of dehumidification, it helps to understand why you might need a dehumidifier in the first place. Controlling humidity in your home provides several advantages:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prevents growth of mold, mildew, dust mites, and other allergens that thrive in damp environments<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduces musty odors from excess moisture<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Protects furniture, clothing, and other belongings from damage<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Makes the air feel less muggy and sticky<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Alleviates some asthma and allergy symptoms<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Improves sleep if high humidity affects your comfort<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">By removing excess moisture from the air, dehumidifiers promote a cleaner, healthier home environment.<\/span><\/p>\n<p><a href=\"https:\/\/www.appliancepartspros.com\/b\/the-most-common-parts-to-fail-on-a-dehumidifier\/\"><b>Read More: The Most Common Parts to Fail on a Dehumidifier<\/b><\/a><\/p>\n<h2><strong>Key parts of a dehumidifier<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">While specific components can vary slightly by brand and model, most dehumidifiers contain the same basic functional parts:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Air filter<\/b><span style=\"font-weight: 400;\"> &#8211; Catches dust and particles before air enters the dehumidifier<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fan<\/b><span style=\"font-weight: 400;\"> &#8211; Pulls humid room air into the dehumidifier<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Evaporator coils<\/b><span style=\"font-weight: 400;\"> &#8211; Cools the air so moisture condenses<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Condenser coils<\/b><span style=\"font-weight: 400;\"> &#8211; Reheats the air before it exits back into the room<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Compressor<\/b><span style=\"font-weight: 400;\"> &#8211; Circulates and compresses the refrigerant<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Refrigerant tubing<\/b><span style=\"font-weight: 400;\"> &#8211; Transports refrigerant through the coils<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Condensate tank<\/b><span style=\"font-weight: 400;\"> &#8211; Collects water removed from the air<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Humidistat<\/b><span style=\"font-weight: 400;\"> &#8211; Monitors and regulates humidity levels<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Control panel<\/b><span style=\"font-weight: 400;\"> &#8211; Displays settings and allows adjustments<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These parts work together to draw in air, remove moisture, and expel drier air. Now let&#8217;s look at the process in more detail.<\/span><\/p>\n<h2><strong>How dehumidifiers work<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Dehumidifiers lower humidity levels through a multi-step mechanical process:<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1. Air intake and filtration<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Room air is pulled into the dehumidifier through an intake grill by an internal fan. Before entering the main components, the air passes through a filter that traps dust, pet hair, pollen, and other particles. This helps keep the interior parts clean for optimal operation. The filter needs occasional cleaning or replacement.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2. Coil cooling<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">After being filtered, the air moves across a set of evaporator coils which cool the air below its dew point. This causes moisture in the air to condense on the coils the same way a glass of ice water sweats on a hot, humid day.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">3. Moisture removal<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The condensed water on the evaporator coils accumulates and then drains into a basin or bucket. Instead of requiring regular emptying, certain dehumidifiers conveniently pipe this condensate directly into a drain.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">4. Air reheat<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">After the evaporator section, the now cooler and drier air passes through the condenser coils which reheat it using a refrigerant. This prevents the dehumidifier from blowing cold, clammy air back into the room.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">5. Air circulation<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Once reheated, the dried air gets blown back out into the room through vents, allowing circulation to continue. The cooler condenser coils help dissipate heat from the refrigerant liquid.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">6. Refrigerant compression<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Meanwhile, the compressor compresses the refrigerant gas and pumps it through the tubing between the evaporator and condenser coils. This creates a continuous loop where the refrigerant alternately absorbs or dissipates heat.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">7. Humidity monitoring<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A humidistat or electronic humidity sensor monitors the room&#8217;s humidity level. When the humidity exceeds the humidistat setting, the dehumidifier will run to remove moisture. Once the humidity level drops below the target, the dehumidifier cycles off again. This on-off cycling continues automatically to maintain the preset humidity.<\/span><\/p>\n<h2>Types of dehumidifiers<\/h2>\n<p>A variety of dehumidifiers are available, each tailored to address specific needs and spaces. Refrigerant dehumidifiers, often referred to as compressor-based, are popular for their efficiency in lowering moisture levels in warmer climates. They work by drawing air into coils, cooling it down, and condensing moisture before releasing the drier air back into the environment. Desiccant dehumidifiers, on the other hand, use a chemical agent to absorb moisture from the air, making them particularly effective in cooler climates. There are also whole-house dehumidifiers that are integrated into your home\u2019s heating and cooling system, ensuring optimal air quality and moisture levels throughout every room. For more portable and flexible options, mini dehumidifiers can be easily moved from one space to another, offering targeted moisture control. Understanding the distinctions among these options helps in selecting the appropriate unit to efficiently control humidity levels, enhancing comfort, and indoor air quality.<\/p>\n<h3><strong>Dehumidifier capacities and sizing<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Dehumidifiers are rated by their moisture removal capacity in pints (or liters) per day. This indicates how much water the appliance can condense and extract from the air daily under standard conditions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Common residential capacities are:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Small capacity &#8211; 25 to 35 pints per day<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Medium capacity &#8211; 35 to 50 pints per day<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Large capacity &#8211; 50+ pints per day<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Larger capacity dehumidifiers work faster to dry out a damp space. However, a unit that&#8217;s too large for the room will cycle on and off frequently, reducing efficiency and compressor life. It&#8217;s best to choose a dehumidifier sized appropriately for the application. Closets and bathrooms need much less capacity than a basement or whole house.<\/span><\/p>\n<h3><strong>Dehumidifier controls and settings<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Dehumidifiers have user controls to set the target humidity level and fan speeds. Here are some key settings:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Humidistat<\/b><span style=\"font-weight: 400;\"> &#8211; This lets you set the desired relative humidity between 30% to 80% typically. The dehumidifier runs to maintain this.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fan speed<\/b><span style=\"font-weight: 400;\"> &#8211; Set to higher speeds for quicker drying or lower for quieter operation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Mode<\/b><span style=\"font-weight: 400;\"> &#8211; Choose continuous operation or cycle on\/off automatically when target humidity is reached.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Timer<\/b><span style=\"font-weight: 400;\"> &#8211; Use a timer function to run the dehumidifier for a set number of hours then automatically turn off.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Defrost<\/b><span style=\"font-weight: 400;\"> &#8211; Some units have an automatic defrost mode to prevent ice buildup on coils when operating below 65\u00b0F.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Tank full<\/b><span style=\"font-weight: 400;\"> &#8211; Light indicates when the condensate bucket needs to be emptied. The safety switch shuts off the dehumidifier if overflowing.<\/span><\/li>\n<\/ul>\n<p><strong>Read More: <a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-choose-the-right-dehumidifier\/\">How to choose a dehumidifier<\/a><\/strong><\/p>\n<h2><strong>Dehumidifier Maintenance Tips<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Like any appliance, dehumidifiers require periodic maintenance for efficient operation and longevity. Here are some key maintenance tasks:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Clean the air filter every 1-2 months under normal use. Clogged filters reduce airflow.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Vacuum dust and debris off the condenser and evaporator coils annually. Use a brush or compressed air, to avoid damage to the fins.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Check coils for frost buildup if used below 65\u00b0F and defrost if needed.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Empty the condensate bucket before it overflows, usually every 1-2 days depending on unit size and conditions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Keep the float and bucket switch clean so it shuts off when full.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Listen for any grinding or squealing sounds from a failing compressor or fan motor.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">With periodic maintenance and cleaning, a dehumidifier can provide many years of humid climate control before needing major repairs.<\/span><\/p>\n<p><a href=\"https:\/\/www.appliancepartspros.com\/b\/how-to-deep-clean-your-dehumidifier-to-maintain-air-quality\/\"><b>Read More: How to Deep Clean Your Dehumidifier to Maintain Air Quality<\/b><\/a><\/p>\n<h2><strong>Troubleshooting Common Dehumidifier Issues<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">If your dehumidifier fails to lower humidity as it should, several problems may be the culprit:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Little or no airflow<\/b><span style=\"font-weight: 400;\"> &#8211; Check for a clogged filter, obstructed coils, or broken fan motor.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Frosted coils<\/b><span style=\"font-weight: 400;\"> &#8211; Low temps below 65\u00b0F cause frost buildup. Turn off, allow thawing, and run on defrost mode.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Leaky ductwork<\/b><span style=\"font-weight: 400;\"> &#8211; Damaged or disconnected ducts allow conditioned air to escape rather than circulate.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Refrigerant leak<\/b><span style=\"font-weight: 400;\"> &#8211; Low refrigerant reduces efficiency. Have professionally repaired.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Bad humidistat<\/b><span style=\"font-weight: 400;\"> &#8211; If set correctly but the unit runs constantly, the humidistat may be defective. Replace it.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Full bucket<\/b><span style=\"font-weight: 400;\"> &#8211; When the collection bucket is full, a float switch should turn off the dehumidifier. If it overflows, clean or replace the float assembly.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Compressor failure<\/b><span style=\"font-weight: 400;\"> &#8211; An inoperative compressor won&#8217;t circulate refrigerant. Replace a defective compressor.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Addressing any issues quickly preserves your dehumidifier&#8217;s functionality and prevents minor problems from escalating over time.<\/span><\/p>\n<h2><strong>Dehumidifier Benefits for Healthier Living<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Dehumidifiers are invaluable for controlling excess moisture and minimizing the growth of allergens like mold, bacteria, and dust mites. By understanding how dehumidifiers work and properly maintaining them, you can enjoy cleaner air and a more comfortable environment. A dry home is a healthy home. With the in-depth knowledge provided in this article, you can make an informed decision when choosing a dehumidifier and keep it operating at peak efficiency for years to come.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you have questions or need replacement parts for your home appliances, have your model and serial number ready and visit us at <\/span><a href=\"https:\/\/www.appliancepartspros.com\/\"><b>AppliancePartsPros.com<\/b><\/a><span style=\"font-weight: 400;\">. Also, make sure to <\/span><a href=\"https:\/\/www.facebook.com\/appliancepartspros\/\"><b>follow us on Facebook<\/b><\/a><span style=\"font-weight: 400;\"> and<\/span><a href=\"https:\/\/www.youtube.com\/@appliancepartspros\/videos\"> <b>subscribe to our YouTube channel!<\/b><\/a><\/p>\n<\/div><\/section>\n<div  class='av-social-sharing-box  avia-builder-el-3  el_after_av_textblock  avia-builder-el-last  '><div class='av-share-box'><h5 class='av-share-link-description av-no-toc '>Share this entry<\/h5><ul class='av-share-box-list noLightbox'><li class='av-share-link av-social-link-facebook' ><a target=\"_blank\" aria-label=\"Share on Facebook\" href='https:\/\/www.facebook.com\/sharer.php?u=https:\/\/www.appliancepartspros.com\/c\/how-dehumidifiers-work-comprehensive-guide\/&#038;t=How%20Dehumidifiers%20Work%3A%20A%20Comprehensive%20Guide' aria-hidden='false' data-av_icon='\ue8f3' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Facebook' 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