Understanding Vacuum Cleaner Suction vs. Airflow

When it comes to finding the perfect vacuum cleaner, the debate between suction and airflow often comes up. At Think Vacuums, we’ve had countless discussions and demonstrations about these performance metrics.

We’re here to clear up any confusion and help you make an informed decision. With our extensive experience in repairing and selling vacuums, we are your trusted authority in the industry, offering a wide range of the best and most powerful vacuum brands on the market.

The Core Elements of Vacuum Performance

When evaluating a vacuum cleaner, two primary performance elements are crucial to understand: Airflow and Suction.

These terms might seem technical, but they are essential for determining how effectively a vacuum will clean your home.

1. Airflow (CFM - Cubic Feet per Minute)

Airflow measures the volume of air that the vacuum can move, expressed in cubic feet per minute (CFM). Think of airflow as the wind that carries dirt and debris away.

The higher the airflow, the more efficiently the vacuum can transport particles through the system and into the collection bag or canister.

2. Suction (Inches of Water Lift)

Suction, also known as vacuum, is measured in inches of water lift. This term describes the maximum pull the vacuum’s motor can achieve by lifting a column of water vertically.

Suction is all about the force that the vacuum generates to pick up dirt from surfaces. The greater the suction power, the more effectively the vacuum can lift heavier particles.

The Performance Curve: Balancing Airflow and Suction

A central vacuum motor operates similarly to a jet engine, with turbine propellers spinning at thousands of revolutions per minute. This generates significant vacuum power and airflow. Interestingly, the performance curve of a central vacuum motor has an inverse relationship:

• When airflow is at its maximum, suction is at its weakest, and vice versa.

The term "Airwatts" was introduced to find the optimal point where suction and airflow coexist at their most efficient levels. However, it’s important to note that the maximum airwatts value often falls outside the typical operating range of a working central vacuum system.

In real-world scenarios:

• A central vacuum does not function at a 2-inch orifice where airflow is at its greatest.
• Similarly, you can't vacuum effectively at a 0-inch sealed vacuum orifice where suction is at its peak.

It’s the movement of air that carries dirt away, just like autumn leaves blowing across an empty parking lot. The difference in atmospheric pressure (vacuum) generates the movement and velocity of the air within your central vacuum system.

Why Both Suction and Airflow Matter

Both suction and airflow are essential for a vacuum cleaner to function effectively.

• Higher vacuum potential (sealed vacuum) ensures better performance at the end of the hose in a household installation.

This is because motor airflow performance can be significantly reduced by restrictions commonly found in a typical central vacuum system.

Trust Think Vacuums for Expert Advice and Top-Quality Products

At Think Vacuums, we pride ourselves on being a trusted source of knowledge and expertise in the vacuum industry. Whether you need repairs or are looking to purchase a new vacuum, we offer a wide array of top brands to suit your needs. Our team is committed to helping you find the perfect vacuum solution that delivers both powerful suction and efficient airflow.

Don’t get caught up in misleading performance claims. Let Think Vacuums guide you in choosing a vacuum cleaner that combines the best of both worlds—suction and airflow. Visit us today and experience the difference of working with true vacuum experts.