The last remaining option is to replace your attic fan with a new and quieter model.
Inline fan blowing into attic noise.
Air king 700 cfm inline fan.
Attic fans usually last around 4 5 years if they re used regularly.
Continental fan manufacturing 147 cfm energy star in line duct fan bathroom ventilation kit from the axc collection.
They re easily heard and can sometimes be quite annoying.
But while you can t have two fans with one vent you can make one fan and one vent serve two bathrooms.
Ken brown 6 inch 240 cfm booster fan inline duct vent blower for hvac exhaust and intake 5 5 grounded power cord low noise 3 0 out of 5 stars 2 20 99 20.
Perhaps you don t feel like repairing it or you can t find the right parts either.
Vevor utility blower fan 10 inch portable ventilator high velocity utility blower mighty mini low noise with 5m duct hose 10 inch with 5m duct hose 4 3 out of 5 stars 29.
Available in 1 finish.
Solar attic fan 36 watt black with 25 year warranty florida rated.
These fans come in single port and multi port styles and the latter can easily provide ventilation for several rooms in the building.
Available in 1 finish.
While inline vent fans usually operate on less power than standard fans they do come in a variety of sizes and strengths.
Soler and palau 142 cfm inline centrifugal dryer booster fan kit.
You d often blow air from one bathroom into the other and local building inspectors wouldn t approve it.
But with inline duct fans noise is no longer an issue.
This setup requires an in line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms see photo.
Digging into the details of air transfer.
With standard booster fans the minute they re turned on their noise is noticeable.
After that different parts get worn down and require fixing or replacement.