Learn About Duct Sealing

Why is duct seal important in your home?

The Downsides of Neglecting Duct Sealing: Energy Waste and Comfort Compromises

The temperatures are cooling down which means it is soon to be time to turn on your heater in your home.

When it comes to the efficiency of your heating, ventilation, and air conditioning (HVAC) system, one of the most overlooked factors is the state of your ductwork. Failing to properly seal your ducts can lead to a host of problems, from energy wasted to reduced comfort levels. We'll explore the significant disadvantages of neglecting duct sealing in your home.

What is Duct Sealing?

Duct sealing is the process of sealing gaps, cracks, and joints in the ductwork of a HVAC system. This ensures that conditioned air (whether heated or cooled) is efficiently delivered to the intended living space in a building.

How Does Duct Sealing Work?

Duct sealing typically involves the application of a specially formulated sealant as well as metal tape to the joints and connections of the ductwork. This sealant dries to a flexible, airtight finish, effectively closing off any openings that may be allowing conditioned air to escape. In many cases, mechanical fasteners like foil or metal tape may also be used in conjunction with the sealant for added reinforcement.

Disadvantages of Leaky Ducts

1. Energy Inefficiency

One of the most significant drawbacks of a leaky duct system is the inefficiency it introduces to your HVAC system. Leaky ducts allow conditioned air to escape before it reaches its intended destination. This means that your heating or cooling system has to work harder and longer to maintain the desired temperature in your home. As a result, you end up using more energy, which translates to higher utility bills.

2. Higher Utility Bills

When your HVAC system has to work overtime due to leaky ducts, it inevitably leads to increased energy consumption. This spike in energy usage will be reflected in your monthly utility bills. Over time, the cumulative effect can result in significantly higher expenses, potentially costing you hundreds of dollars more each year.

3. Inconsistent Comfort

Leaky ducts can lead to uneven heating or cooling throughout your home. Some rooms may feel too warm, while others remain chilly. This inconsistency in comfort levels can make it challenging to maintain a comfortable living environment for everyone in the household. It may even lead to family members resorting to space heaters or fans, further driving up energy consumption.

4. Reduced Indoor Air Quality

Leaky ducts not only allow conditioned air to escape but can also draw in unfiltered air from attics, crawl spaces, or other unconditioned areas of your home. This can introduce dust, allergens, and pollutants into your living spaces, potentially exacerbating allergies and respiratory issues. Additionally, it means your HVAC system has to work harder to filter and condition this additional air, putting extra strain on the equipment.

5. Shortened HVAC Lifespan

The strain placed on your HVAC system due to leaky ducts can lead to accelerated wear and tear on the equipment. This can result in more frequent breakdowns and a shortened overall lifespan for your heating and cooling system. Ultimately, this means you'll be faced with costly repairs or a premature replacement of your HVAC unit.

6. Environmental Impact

In addition to the financial costs, neglecting duct sealing also has an environmental impact. Higher energy consumption means increased greenhouse gas emissions, contributing to environmental issues such as climate change.


Neglecting duct sealing can lead to a range of undesirable consequences, from higher energy bills to compromised indoor comfort and air quality. By investing in duct sealing, you not only save money in the long run but also contribute to a more sustainable and comfortable living environment for you and your family. So, if you haven't already, consider duct sealing as a smart and practical step towards optimizing your home's HVAC system.

To see which utility funded programs that are available, you can check them at this link here or the following:

- SoCal Edison & SoCalGas Comprehensive Manufactured Housing Programs (CMHP)

- SoCal Edison RDI for single family and multifamily

- SoCalGas Summer Reliability

For more information and to see if there is a local utility that may be offering duct seals for your home at no cost, you can call 1-800-818-4298.

Otherwise, if the programs are not funded by the utilities, Synergy Companies can give you a quote to upgrade the duct sealing in your home.