HVAC systems can become surprisingly loud. When you are trying to settle in for a quiet day watching TV or listening to music, you may find that the HVAC system may even force you to turn the TV or music up. However, your HVAC doesn't have to be like this.
Make Sure Your Vent Dampeners are Open
Check to make sure you don't have any closed vent dampers. If you have several vent dampers closed, that can make your HVAC system louder. Not only that, but the closed dampers will place more strain on your HVAC system. In general, you should keep your vent dampers open.
Replace or Clean Air Filters
Make sure your air filters are not dirty. As dirt builds up on your air filters, your HVAC will have a more difficult time operating. As the HVAC works harder, it will also become louder, will use more energy and will also increase the risk that your HVAC system will fail.
Make Sure Your Ductwork is Installed Properly
When your ductwork is not installed properly, it is more likely to sag and bend. This can lead to the air having a more difficult time passing through your ducts. This can lead to static pressure, which can produce a lot of noise. Every HVAC system has some static pressure, but some HVAC systems have too much.
Expand Your Ducts
Static pressure becomes too large when the air ducts are not able to handle the volume of air passing through the air ducts. Fortunately, some easy solutions can solve the high-static pressure. Sometimes, you must replace ductwork that is too small with larger ducts.
Add Bypass Ducts, Grilles, and Registers
When you have multiple zones for a single system, you may want to add a bypass duct. These will help relieve pressure and will reduce the amount of noise that is produced. Also, a lot of homes do not have enough return air. By adding expand grilles and registers, you may be able to reduce static pressure and reduce your HVAC noises as a result.
Hire an HVAC Technician
If you still aren't able to quiet your HVAC, you may want to contact an HVAC maintenance technician. Make sure to carefully describe the sound you hear because technicians will sometimes hear a different sound and may simply fail to hear the noise you are more concerned about.