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Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide

Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide

The strategic placement of a dehumidifier within your home is pivotal to its efficiency in mitigating excessive moisture in the air. If you are contemplating situating your dehumidifier near your furnace, it is essential to explore whether this is an ideal arrangement. In this article, we will delve into this question and provide insights garnered from our research.

Is It Advisable To Place A Dehumidifier Near A Furnace?

Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide

Positioning a dehumidifier near a furnace or using both appliances simultaneously is generally discouraged. This practice can excessively dry out the air, leading to various health concerns and household issues. Additionally, furnaces often have a dehumidifying effect on the home, which can suffice unless moisture problems are severe.

To gain a comprehensive understanding of dehumidifiers and why they should not be used near a furnace, let’s explore this topic further, including the optimal placement for your dehumidifier and the appropriate temperature range for its operation.

Why Excessive Moisture Is A Concern

Excessive moisture in the air can be just as problematic as insufficient humidity levels. High humidity provides an ideal environment for the growth of mold, mildew, and bacteria, resulting in musty odors, unsightly surfaces, and damage to household materials. Furthermore, individuals with asthma and allergies may experience exacerbated symptoms, such as itching, eye irritation, sneezing, and chest discomfort, in high-humidity conditions.

Dehumidifiers play a crucial role in addressing excess humidity. These devices draw in warm indoor air and, as it contacts the cooler coils inside the unit, condensation occurs, converting water vapor into liquid droplets. These droplets are collected in a reservoir within the dehumidifier, allowing only drier air to circulate back into the living space.

Dehumidifiers prove especially beneficial in regions with elevated humidity levels and in areas of the home prone to dampness. Therefore, understanding the necessity of a dehumidifier in your home and determining its optimal placement are key considerations.

Guidelines For Dehumidifier Placement

Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide
  1. Homes without Forced-Air Furnaces and No Moisture Problems

For homes lacking forced-air furnaces and experiencing no moisture-related issues, deploying a dehumidifier alongside your heating system is unnecessary. This combination can lead to excessively dry indoor air, causing discomfort and potential health issues, such as dry skin, eyes, nose, and hair. Moreover, it may damage household items like wooden furniture and books. Using both appliances simultaneously increases energy consumption and electric bills. A heater elevates indoor temperatures, enabling air to hold more moisture, rendering a separate dehumidifier redundant.

  1. Homes with Forced-Air Furnaces and Moisture Issues in Certain Areas

In homes equipped with forced-air furnaces, you can strategically place a dehumidifier in areas with vents and ducts connected to your HVAC system. Processed air passing through these ducts and vents naturally reduces indoor humidity levels. Focus on areas of the home prone to moisture issues, such as basements.

  1. Homes in Humid Climates

Residents in regions with persistently high humidity should consider installing a central or whole-house dehumidifier. These systems work in tandem with your furnace and air conditioner, maintaining indoor humidity levels between 45% and 55%. This approach enhances comfort, alleviates asthma and allergy symptoms, and safeguards against moisture-related damage to your belongings. Central dehumidifiers offer practicality and ease of maintenance compared to multiple standalone units.

  1. Homes without Moisture Issues

In homes where humidity levels remain within a comfortable range, a dedicated dehumidifier is unnecessary. Your heat pump or air conditioning unit typically suffices to regulate indoor humidity, effectively serving the purpose of moisture control.

Placement Considerations For Dehumidifiers

Choosing the right location for your dehumidifier is essential for its optimal performance:

a. Ensure proper airflow: Dehumidifiers require unhindered airflow for efficient operation. Avoid placing them near large furniture pieces that could obstruct airflow.

b. Coverage area: Consider the dehumidifier’s capacity in relation to the room size. Position it centrally in larger spaces to reach all corners evenly.

c. Connections: Place the dehumidifier near an accessible power outlet to prevent tripping hazards. Additionally, ensure it has a convenient drain connection to facilitate continuous operation and prevent water spillage.

d. Accessibility: Position the dehumidifier where you can easily monitor and maintain it, facilitating efficient operation and troubleshooting.

Temperature Considerations For Dehumidifiers

Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide

To safeguard your dehumidifier from damage, refrain from operating it in temperatures below 60 degrees Fahrenheit. Freezing conditions can cause water within the unit to freeze, potentially harming its components. Before storing the device for winter, disconnect it, clean its parts, and ensure complete drying.


Understanding the purpose of dehumidifiers and their ideal placement is crucial in determining whether they are necessary for your home and where they should be positioned for maximum effectiveness. Utilizing a dehumidifier in conjunction with your furnace is generally not recommended, particularly if your moisture issues are not severe. Proper placement, with consideration of factors like airflow, coverage area, connections, and accessibility, can significantly reduce moisture levels in your home while ensuring safe operation. Lastly, it is vital to heed temperature guidelines to protect your dehumidifier from potential damage.

Is Positioning A Dehumidifier Near Your Furnace Okay? A Simple Guide

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Written by HVAC Contributor

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