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I have a Bosch ISD 2.0 BOVA-36HDN1-M20G with a BVA-24WN1-M20.
24kBTU, Air Handler Unit 2.0 unit.
It was installed in my attic (no basement) and the problem is the sound. Every time the machine ramps up and down the air handler vibrates through the floor and ducts. The noise makes it very uncomfortable in the house and hard to sleep at night.
I had my Bosch tech install vibration pads under the unit but that did not fix anything.
I saw someone on the forums mention adding a lineset silencer to the unit?
Is there a simple solution or maybe a setting on the T-stat to minimize the ramp ups and ramp downs? .
I'm pretty bummed after shelling out coin to not be able to enjoy it when it's running.
Thanks for your help.
Question from user highonlife_99 at hvacadvice at reddit.com.
Answer:
There are several ways to make your air handler quieter:
Add insulation: One of the main sources of noise from an air handler is the vibration of the unit itself. You can add insulation around the unit to help dampen the sound. Acoustic foam or fiberglass insulation can be used to wrap the air handler.
Install vibration pads: Place vibration pads under the air handler to reduce the amount of vibration transmitted to the surrounding structure. This will also help to reduce the amount of noise.
Check the fan blades: If the fan blades are damaged or out of balance, they can create a lot of noise. Check the blades to make sure they are in good condition and balanced properly.
Check the ductwork: Sometimes the noise can be caused by the ductwork. Check to make sure that the ductwork is properly sealed and that there are no leaks or gaps.
Install a muffler: A muffler can be installed in the ductwork to help reduce the amount of noise that is transmitted through the air handler.
Upgrade to a newer, quieter model: If your air handler is old and noisy, upgrading to a newer, quieter model may be the best solution.
Remember to always turn off the power to the air handler before attempting any repairs or modifications. If you are not comfortable making these changes yourself, contact a professional HVAC technician for assistance.