Solutions for Noisy Ducts You can insulate your ductwork with fiberglass to muffle sound. You can also install fiberglass duct board instead of metal ducts to reduce noise. If your ducts are popping against the framing, use rubber pads to separate the framing and the ductwork.Steps for quieting a noisy forced-air system Mark center of start collars on the return and supply side of the heating duct. Cut holes in sheetmetal ducts using a drill fitted with a circle-cutting jig. Attach start collars to duct with ¾-inch self-tapping sheetmetal screws.
How can I make my heat duct quieter?
Solutions for Noisy Ducts You can insulate your ductwork with fiberglass to muffle sound. You can also install fiberglass duct board instead of metal ducts to reduce noise. If your ducts are popping against the framing, use rubber pads to separate the framing and the ductwork.
Why is my forced air furnace so loud?
The simplest explanation for screeching or whistling is that your furnace air filter could be clogged with dust, hair, and dirt. That eerie screech you hear might just be air desperately trying to get through. Fortunately, you can take care of this noise issue yourself, quickly and inexpensively.
Why is my ductwork so loud?
Possible Causes of Ductwork Noise Air Pressure: A buildup of pressure can cause rumbling sounds. It can also cause the metal to expand and contract. When the system comes on, air pushes against the walls of ducts, expanding them. A popping or banging noise can often be heard upon startup.
Why does my furnace sound like a freight train?
“Train” noise coming out of furnace: If too many vents are closed or covered up in your home, is one culprit for this. Just check that good airflow is occurring at several of your registers in the home.
Why is my brand new furnace so loud?
Your New System Works Correctly The most likely reason why your new furnace is noisier than your old furnace is because your new furnace is more efficient than your old furnace. The sound that you are hearing could simply be more airflow.
Is it normal for a furnace to be loud?
Banging and popping sounds are normal. Often, furnaces make these sounds as the ducts expand and contract. However, if the banging and popping sounds are exceptionally loud and frequent, it could signal a problem with your furnace. Ductwork issues often cause loud bangs and pops.
What is a duct silencer?
A duct silencer is a component of ventilation system used to reduce noise transmitted inside ventilation ductwork. Duct silencers are also referred to as sound attenuators, sound traps or mufflers.
Why does my furnace sound like a jet engine?
Furnace Sounds Like a Jet Engine If your furnace sounds like an airplane or jet engine taking off, it's usually a gas issue. Gas could be leaking from a line or valve. Or, if you hear a click before the swooshing sound, you may have a broken heat exchanger that is leaking gas.
Why does my furnace sounds like a washing machine?
Thumps and bumping noises, like an unbalanced washing machine, often indicate an unbalanced blower wheel or motor. This is a serious issue that requires immediate HVAC repair. The blower wheel and motor are major furnace parts and you don't want them bouncing around.
Why does my new furnace sound like a jet engine?
Blocked or closed vents can cause increased sound pressure as the furnace blower motor and fan push air through, resulting in a “jet engine” sound.
How do I adjust the fan speed on my furnace?
When increasing the blower speed, loosen the setscrew a little bit. This is the part that holds the pulley to the furnace's driveshaft. Turn the pulley one rotation clockwise on the shaft. If you want even more speed, do two rotations.
Are some furnaces quieter than others?
For example, the Lennox SLP98V Variable-Capacity Gas Furnace is at least 50 percent quieter than competitor's furnaces, making the SLP98V gas furnace the quietest furnace you can buy1. SilentComfort™ is achieved by utilizing variable-speed technology.
Why does my furnace sounds like a washing machine?
Thumps and bumping noises, like an unbalanced washing machine, often indicate an unbalanced blower wheel or motor. This is a serious issue that requires immediate HVAC repair. The blower wheel and motor are major furnace parts and you don't want them bouncing around.
How much noise should a furnace make?
Furnaces generally aren't noisy, and most modern furnaces are designed for noise reduction. A properly functioning furnace shouldn't make too much noise, especially after initially starting. One that is generally needs repairs, and the type of sound you're hearing can help determine the exact issue with the system.
Why does my furnace make a loud humming noise?
Noise #4: Humming or buzzing But if you hear a loud humming or buzzing sound coming from your furnace, it usually means your furnace has an electrical problem. The most common electrical issues that cause a humming or buzzing sound include: A failing blower motor capacitor. An aging or unlubricated blower motor.
When should I worry about my furnace noise?
In most cases, it is wise to call a service technician. A pinging or popping sound is most likely coming from one of the ducts and is not really something to worry about. If you hear an odd vibrating noise or whining, it may indicate a problem with your furnace and a technician really needs to check it out.
Why does my furnace sound like a motorcycle?
The metal can expand when heated and will contract as it cools down after the furnace cycles off. As the metal ducts expand, they typically make a banging or booming noise. Banging ductwork usually is not a cause for concern, but there are things you can do to reduce the noise.
How do I lower my blower speed?
You can increase or decrease the blower speed by slightly adjusting the pulley on the blower drive motor. To increase blower speed, slightly loosen the setscrew that holds the pulley to the driveshaft. Move or turn the pulley clockwise on the shaft one turn, then tighten setscrew.
What controls the blower motor speed?
The blower motor resistor is responsible for controlling the blower motor speed. In the past, this was done by varying the voltage supplied to the blower motor. In newer applications, the blower motor resistor is actually a solid state module that sends a varied signal to the blower motor.
What is the quietest forced air furnace?
Lennox SLP98V With an efficiency rating of up to 98.7 percent AFUE, the SLP98V is considered as the quietest, most efficient furnace available on the market today.
Do they make a quiet furnace?
The Carrier Infinity 98 family of gas furnaces now includes the quietest gas furnace that you can buy. Carrier has announced that the 59MN7A06017-14 gas furnace has achieved the lowest sound rating which exceeds all other comparable products.
Why are high efficiency furnaces so loud?
In order to work properly and efficiently, your furnace needs a proper mixture of air and gas. If you have too much air and not enough gas, gas can build up resulting in a loud booming sound.
Why does my furnace make a loud humming noise?
Noise #4: Humming or buzzing But if you hear a loud humming or buzzing sound coming from your furnace, it usually means your furnace has an electrical problem. The most common electrical issues that cause a humming or buzzing sound include: A failing blower motor capacitor. An aging or unlubricated blower motor.
When should I worry about my furnace noise?
In most cases, it is wise to call a service technician. A pinging or popping sound is most likely coming from one of the ducts and is not really something to worry about. If you hear an odd vibrating noise or whining, it may indicate a problem with your furnace and a technician really needs to check it out.
Can a dirty furnace filter cause a humming noise?
If there is a loud humming noise, the filter might be clogged. This makes it harder for air to pass through the filter for the furnace system. It can result in parts starting to fail, as well as a costly repair bill for the unit.
How do you quiet a noisy forced air heating system?
In this video, This Old House plumbing and heating contractor Richard Trethewey explains how to quiet a noisy forced-air system. Mark center of start collars on the return and supply side of the heating duct. Cut holes in sheetmetal ducts using a drill fitted with a circle-cutting jig.
How to make an air compressor quieter?
Rather, you only have to attach the padding to the nearest wall of the compressor so that no sound echoes. This could be an effective solution when you want to make the air compressor quiet. Even this is one of the best solutions for the noise of the compressor.
How do you make an air vent quieter?
You can create a return air sound baffle. Most air vents are loud, as they are not made up of sound-absorbing technology. By adding a sound damping layer to the ductwork, you can diminish most of the noise. You can have an expert add acoustic foam to the vent to muffle the noise.
How can I reduce the noise of my air conditioner?
Fiberglass duct liner absorbs noise and contributes to indoor comfort by lowering heat loss or gain through duct walls. Or if you have the space for it, build some baffles out of 2x4' acoustic ceiling tiles inside the return chamber like below. Secure them to some sort of structure so they don't get pulled into the blower.
Below you will find two interesting articles on a similar topic 👇
Why is my furnace blower so loud when running?Why is my heat pump so loud?
