The average home ducting system has a leakage rate of 28%. Leaks in ducting may be as small as pin holes, or they can be large gaps between the joints of ducting pieces.
There are a few different problems that leaky ducts can cause in your home.
First of all, leakage drops your home efficiency dramatically. When you run your A/C through a leaky ducting system, roughly one-third of the cool air never even makes it into your living space. Your A/C will have to work much harder and use more energy to keep your home at the same temperature.
Secondly, leaky ducts can be dangerous as they have the potential to spread harmful pollutants throughout the air in your home.
When you run your HVAC, the pressure within the ducts creates a vacuum that can pull in particles from your attic such as dust, dirt, and pollen. Worse yet, your ducts may suck in more harmful toxins such as asbestos, mold, or animal droppings.
Ducting system leakage in one of the top contributors to poor indoor air quality. By re-sealing your ducts, you will be able to breathe easy.
Even a brand new ducting system can be leaky. There are always micro-penetrations through which air can escape.
That’s why Zero Energy Contracting uses a duct blaster and sophisticated measurement equipment to eliminate as much leakage as possible.
We start by sealing off all ducting entrances and then pressurize the system and measure how many cubic feet per of air are escaping per minute. We can then detect and repair any holes.
One of the reasons that ducts are so frequently leaky is that the extreme cold and hot temperatures cause the ducting pieces to expand and contract. These changes can create tears or disconnect one piece of ducting from another.
We use a pliable putty when repairing ducting penetrations that will expand and contract at the same rate as the ducts to ensure a lasting seal.
Through this method, we can guarantee a ducting leakage rate of 5% or less.