Placing Labels on the Inside of the Duct is a No-No

Author: Banner Sales Co. | | Categories: HVAC Labels, Laser Labels, Vulcan labels.

Banner Sales Co.

If you’re in the HVAC industry, you know how crucial labeling is for your equipment. Proper labeling ensures safety, efficiency, and compliance with industry standards. But not all labels are created equal, and there’s one critical mistake you should avoid: placing labels inside the duct. In this informative blog, we at Banner Sales Co. will dive into the world of HVAC labels and why it’s essential to avoid the inside of the duct when applying them.


The Significance of HVAC Labels

Before we delve into the “no-no” of placing labels inside the duct, let’s first understand why HVAC labels are so significant for HVAC technicians all over the United States and Canada.

Labels: The Unsung Heroes

Labels may seem like a minor detail in the grand scheme of HVAC systems, but they play a pivotal role. They provide vital information about the duct being created: type of connection, insulated or not, which job is it for, and where it gets installed.

The Inside of the Duct Dilemma

Now, let’s get to the heart of the matter – why placing labels inside the duct is a big mistake.

Adhesive Labels in the Duct
Some HVAC professionals may think that placing labels inside the duct is a convenient way to keep critical information close to the equipment. However, this approach comes with several significant drawbacks.

Moisture and Adhesive Labels

The inside of ducts can be a humid environment. Adhesive labels exposed to moisture can lose their stickiness and start to peel off. This can lead to pieces of the label detaching and potentially damaging the HVAC system over time.

Accessibility Issues

Placing the label inside the duct means that once it is finished, the job and duct location are hidden.  Installers will take longer to discern where the duct goes and TIME IS MONEY.

The Right Way to Label HVAC Equipment

Now that we’ve established why placing labels inside the duct is a no-no, let’s discuss the correct approach to labeling HVAC equipment.

Exterior Labels

The best practice is to place labels on the exterior of the duct or equipment. Exterior labels are easily accessible and visible, making it convenient for technicians and ensuring compliance with safety regulations.

High-Quality Adhesive Labels

When choosing labels, opt for high-quality adhesive labels designed for HVAC applications. These labels are specifically formulated to withstand the rigors of the HVAC environment, including temperature fluctuations and exposure to moisture.


Labeling is a critical aspect of HVAC equipment maintenance and safety. While it’s tempting to place labels inside the duct for convenience, it’s a practice that should be avoided. Instead, opt for exterior labels that are easily accessible and durable.

At Banner Sales Co., we understand the unique needs of HVAC professionals across North America. Our high-quality adhesive labels are designed with the end user in mind, ensuring that your equipment remains safe and compliant.

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