Should You Seal Your Air Handler? Here’s The Truth

Air handlers play a crucial role in maintaining indoor air quality and comfort. However, one question that often arises is whether air handlers should be sealed to enhance their efficiency and performance. In this comprehensive blog post, we will delve into the pros and cons of sealing air handlers, providing you with the necessary insights to make an informed decision.

Benefits of Sealing Air Handlers

Improved Energy Efficiency

Air leakage around air handlers can lead to significant energy loss, as conditioned air escapes and unconditioned air enters the system. By sealing air handlers, you can effectively minimize air leakage and reduce energy consumption, resulting in lower utility bills.

Enhanced Indoor Air Quality

Air leakage can also allow contaminants, such as dust, pollen, and pet dander, to enter the air handler and circulate throughout the house. Sealing air handlers helps prevent these contaminants from entering the system, resulting in improved indoor air quality and a healthier living environment.

Reduced Noise Levels

Air leakage can create unwanted noise as air escapes from the air handler. Sealing air handlers can significantly reduce these noises, creating a quieter and more comfortable indoor space.

Considerations Before Sealing Air Handlers

Type of Air Handler

Not all air handlers are suitable for sealing. Some air handlers are designed with intentional air leakage to facilitate proper operation. Therefore, it’s essential to consult with an HVAC professional to determine if sealing is appropriate for your specific air handler.

Accessibility

Sealing air handlers can be a complex and time-consuming process, especially if the air handler is located in a difficult-to-reach area. Consider the accessibility of the air handler before making a decision.

Cost

The cost of sealing an air handler can vary depending on the size, complexity, and accessibility of the unit. It’s important to factor in the cost when considering whether to seal your air handler.

DIY vs. Professional Sealing

DIY Sealing

If you have basic DIY skills and the air handler is easily accessible, you may consider sealing it yourself. However, it’s crucial to follow the manufacturer’s instructions carefully to ensure a proper seal.

Professional Sealing

For complex or difficult-to-reach air handlers, it’s recommended to hire a qualified HVAC professional. They have the necessary tools, experience, and expertise to ensure a professional and effective seal.

When Sealing Is Not Recommended

Open-Return Air Systems

In open-return air systems, the air handler draws air from the living space and returns it to the same space. Sealing air handlers in these systems can disrupt the airflow and create negative pressure, leading to performance issues.

Variable Air Volume (VAV) Systems

VAV systems adjust the airflow to different zones based on demand. Sealing air handlers in these systems can interfere with the airflow control, compromising system performance.

Key Points: Making an Informed Decision

Whether or not to seal an air handler is a decision that requires careful consideration. By weighing the benefits and considerations outlined above, you can make an informed decision that best meets the needs of your home and HVAC system. Remember, it’s always advisable to consult with an HVAC professional to ensure a proper evaluation and sealing process.

Questions We Hear a Lot

Q: What materials can be used to seal air handlers?
A: Common materials for sealing air handlers include mastic, foil tape, and weatherstripping.

Q: Can I seal the air handler myself if I have limited DIY skills?
A: If the air handler is easily accessible and you have basic DIY skills, you may attempt to seal it yourself. However, it’s crucial to follow the manufacturer’s instructions carefully.

Q: How often should I inspect the seal on my air handler?
A: It’s recommended to inspect the seal on your air handler annually to ensure it remains intact and effective.

Q: Can sealing an air handler improve my HVAC system‘s efficiency?
A: Yes, sealing an air handler can significantly improve the efficiency of your HVAC system by reducing air leakage and energy consumption.

Q: What are the potential consequences of not sealing an air handler?
A: Not sealing an air handler can lead to increased energy consumption, reduced indoor air quality, and higher noise levels.