What Are Duct Noises Communicating?
Duct noises can be unsettling, and whatever the reason or reasons, particularly if they are ongoing and disruptive, it is a sure sign that it’s time to contact your HVAC contractor. While your HVAC system will make some noise, it is important to understand what noises are considered normal, and which ones signal potential problems.
Why Ducts Make Noise
Ducts are made from a variety of materials including plastic, metal, and fiberglass. The type of material can greatly impact the kinds of noises that you hear.
When your thermostat signals the HVAC system to engage, the heater or air conditioner blower will send the warmed or cooled air into the ductwork. This fills the ducts with air, increasing the pressure inside them. The ducts expand to accommodate the pressure from the excessive air flow. This can cause whistling in metal ducts. Some ducts will make popping sounds, especially if they rub against wood. Popping and creaking sounds can occur as the ducts expand and contract. The pressure differences can also result in a rumbling sound as the walls of the ducts expand and contract.
The shape of the ducts can also be a contributing factor. Rectangular ducts don’t hold as much pressure as circular ducts, and can result in more noise.
Other Problems Can Cause Noise in Your Ductwork
Apart from pressure, material, and shape, other common problems can result in duct noises. Small creatures such as squirrels and rats can end up in your ductwork. The clicking sounds from their hands and feet and the tumbling sounds they make as they fumble around in the ducts can be unsettling. If you suspect there is an animal in your ductwork, contact pest control right away. If these creatures die within your ductwork it can create other problems. Faulty installation could also be a possibility. Shoddy workmanship has caused homeowners many problems.
In general, duct noises aren’t really a sign that something serious is happening. However, if only to get rid of the distracting sounds, especially when you are trying to sleep, it is best to consult a professional.
Contact Mike Merritt Heating & Air if you are experiencing any problems with your HVAC system. Our NATE-certified technicians have the experience and knowledge to tackle even the most troubling HVAC concerns. Give us a call today at 904-240-4038 for more information about our services.