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13 Oct, 2023
Posted by Jason Brown
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Positive Input Ventilation vs Dehumidifier: Which Is Better for Your Home?


Maintaining the right indoor humidity levels is crucial for the comfort and health of your home. Two common solutions to address this issue are Positive Input Ventilation (PIV) systems and dehumidifiers. In this blog post, we will compare the two options, exploring the benefits and drawbacks of each, to help you determine which is the better choice for your home.

Positive Input Ventilation (PIV)

How PIV Works

PIV systems are designed to improve indoor air quality and control humidity levels. They work by introducing fresh, filtered outdoor air into your home at a controlled rate. This constant influx of fresh air helps dilute moisture and control humidity levels while preventing condensation and dampness issues.

Energy Efficiency

One of the significant advantages of PIV systems is their energy efficiency. They typically consume less energy than dehumidifiers, as they rely on a low-power fan to introduce outdoor air. Additionally, PIV systems can reduce the need for mechanical heating and cooling systems, helping you save on energy bills.

Low Maintenance

PIV systems require minimal maintenance. Once installed, they run automatically, and the filters, if present, may need occasional replacement. They are a low-hassle solution for maintaining indoor air quality.

Whole-House Ventilation

PIV systems offer whole-house ventilation, ensuring that fresh air is distributed throughout your home, not just in a single room. This feature is especially beneficial for homes with multiple rooms or where moisture issues are widespread.


How Dehumidifiers Work

Dehumidifiers are appliances designed to extract excess moisture from the air within a specific room or area. They do this by pulling in air, cooling it to condense moisture, and then reheating the dry air before releasing it back into the room.

Targeted Solution

Dehumidifiers are ideal for addressing humidity issues in specific areas, such as basements, bathrooms, or bedrooms. They are portable and can be moved from one room to another, making them a versatile choice for localized problems.

Faster Results

Dehumidifiers can provide quicker results in terms of reducing humidity levels in the areas they are placed. They are especially effective in emergencies, such as after a water leak or flood.

Maintenance and Energy Use

Dehumidifiers require regular maintenance, including emptying the water reservoir and cleaning the unit to prevent mold and mildew growth. They can also consume a significant amount of energy, especially if used continuously in a large space.

Comparing PIV and Dehumidifiers


PIV systems offer whole-house ventilation and are better suited for addressing humidity issues throughout your home. Dehumidifiers, on the other hand, are localized solutions, targeting specific areas.

Energy Efficiency

PIV systems are generally more energy-efficient as they consume less power. Dehumidifiers, especially larger units, can increase your energy bills.


PIV systems require minimal maintenance, making them a low-hassle choice. Dehumidifiers need regular cleaning and emptying, which can be more time-consuming.

Initial Cost

Dehumidifiers are often less expensive than PIV systems, making them a budget-friendly choice for localized humidity issues. PIV systems may require a higher initial investment but offer long-term energy savings.


Choosing between Positive Input Ventilation (PIV) and a dehumidifier depends on your specific needs and the scale of the humidity issues in your home. PIV systems are a more energy-efficient and low-maintenance option for whole-house ventilation and humidity control. Dehumidifiers are portable and provide faster results but are better suited for targeting humidity issues in specific areas. Consider your budget, the scope of your humidity problems, and your long-term energy efficiency goals when making your decision. Both options have their merits, so choose the one that best suits your unique requirements and preferences.

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