What is Duct Sealing?

What is Duct Sealing?

Duct Sealing is a service in which we remove the duct work from your air conditioner, apply a high velocity mastic sealant, reinforced with fiberglass mesh, reattach the duct work using high tension strapping, and secure the insulation around each duct. Then we seal all seams where the air handler meets the supply plenum and return plenum. Furthermore, we endure that all duct work is properly strapped and ensure there are no sags in the duct runs.

Why is Duct Sealing Important?

Duct Sealing is important for several reasons. Ever wonder why people have their duct work cleaned regularly? Because duct work is very “leaky” and these leaks allow unfiltered air and attic debris such as insulation and dirt to infiltrate the system. This is also primarily why the evaporator coil gets dirty. It’s actually very senseless to have duct work cleaned and leave the system unsealed to become recontaminated. Another very important reason is that these leaks literally equate to dollars being wasted on conditioned air leaking into the attic. The list of benefits could go on, but these are the primary reasons duct sealing is important.

How Often Should My Duct Work Be Sealed?

Aside from having components replaced, if the duct work is correctly sealed, this should last fifteen to twenty years before they should be resealed.

What is a Blower Door test?

What is a Blower Door test?

This is a question that we frequently receive, as well as a topic in which we discuss with customers on nearly every job we do. When we visit a home and begin to determine what their specific energy reduction needs might be, a Blower Door test is one of the most powerful and revealing tools which we utilize. As our primary goal is turning your home into an efficient “ice chest,” we need to apply the same principles as ice chest incorporates. One thing that’s obvious about an ice chest is that the lid has to be kept shut to keep the ice from melting. The same concept applies for your home. We need to keep indoor and outdoor air separated. There are many little gaps and cracks, over here and hidden through there, which allow outside air to enter the house, or Building Envelope to be exact.

How does this work in my home?

The Blower Door test is set up with an adjustable frame which is fitted to an exterior door, then we attach a fabric to this frame, and lastly we insert a calibrated fan into this assembly. We then create a vacuum, or suction inside of the home, causing air to pour into the building through many gaps and cracks. The fan is connected to a manometer which provides us with a measurement of your “air infiltration rate” which is read as cubic feet per minute at standard of -50 Pascal’s. We compare these results to an international standard, relative to the buildings square footage, which determines a several factors. These factors include what is a considered a healthy amount of air coming into the home, and where the line is drawn which means too much air is coming into the house. This measurement value also directly equates to dollars of conditioned air which are being wasted and going outside.

By sealing these penetrations in what is called the pressure boundary of your home, we can achieve a much more efficient home, transforming the home into more of an ice chest. This also importantly reduces air conditioning run times as well as reducing the amount of moisture and outside air coming into the home.

Please Look At Your A/C Return!

Your A/C return may be costing you big bucks………….. EVEN IF THE UNIT IS BRAND NEW!

This unit was a fresh install, done right, sealed properly, except…….. No one bothered looking at or addressing the return.

The A/C return is where your unit gets the air from to condition and cool your home. If the return isn’t sealed properly, your A/C system may pull 120-to 140-degree humid air from the attic killing the unit performance, causing your unit to run longer and more often and shortening the life of your entire A/C system.

This is especially true of a return located in a wall instead of a ceiling. Take a look, if the corners, floor, door and walls don’t completely isolate the return area…….Call us! The Entergy Solutions Residential Solutions Program provides rebates that cover most or all of the cost of sealing your entire A/C System

New AC Units Don’t Fix All Old Problems!

AC Unit in a house in Baton Rouge, LA

When a New AC Unit is installed, that doesn’t mean everything is made new. AC companies focus on the new unit and, most of the time, don’t pay any attention to the return or previously installed duct work. We look at the system as a whole and make sure it is sealed as tight as possible. The air that your system conditions should go into your home, not your attic. Your AC return should only be receiving air that the system has already conditioned, not hot humid air from the attic. These two simple concepts will 1. Lower your energy bills 2. Make your home feel more comfortable 3. Extend the life of your system. My teams will do the work necessary to drop your leakage well below industry standards lowering your energy bills and helping you to live more comfortably. Contact us to learn more.

Focus on properly sealing your Return, Lower Energy Costs and Extend the Life of your System

AC Return, AC Return, AC Return! I can’t stress it enough. If you have a wall return in your home, chances are it’s getting a large percentage of the return air from your attic. Our pros look at AC efficiency differently from an HVAC company. We include the return in all of our testing and sealing. The return pictured was part of a 2.5-ton system in a home in Shenandoah Hills Subdivision in Baton Rouge. The total airflow at 2.5 tons is 1000CFM. If the unit puts out 1000CFMs, it must take in 1000CFM through the return. Our Duct Blaster Test indicated that the unit was receiving 837CFMs of hot, humid, dusty air from the attic, never passing through the filter instead of simply reconditioning the already conditioned air in the home. This causes the unit to work much harder than it should, reducing efficiency, raising energy costs, and causing the home to feel warm and humid. Notice the color of the insulation around the return; its gray and filthy from filtering attic air being drawn into the return.

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Hours & Info

Office Hours
Monday-Friday 6:30AM-6:30PM
Saturday 9:00AM-3:00PM


The following areas in Louisiana: Baton Rouge, Denham Springs, Mandeville, Covington, Slidell