The issue in the attic is that at 48 degrees f.
Very loud noise in attic high humidity.
Snarling noise in the attic.
That s just the properties of moist air.
If you don t mind white noise you can choose 2 to 4 sones.
You are approaching the 43 deg dew point and some colder surfaces like windows you will get condensation there.
This is a classic squirrel in the attic noise.
The lower the rating the quieter the unit.
The attenuation of sound in air is affected by the relative humidity.
Another cause could be twigs or leaves that have clogged your system.
In addition to bees ailion says raccoons squirrels and birds have been known to get into attics and cause noises of course mice and rats can do the same.
The high frequency crack has been attenuated more rapidly than the low frequency portion of the noise.
If your concern is the loud noise dehumidifiers emit this model has a near quiet operation of around 46db.
The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting.
In order to get rid of the hum you need to either operate the fan at a low speed or replace the fan with a new one that has more blades.
This is because moist air is less dense than dry air water vapor weighs less than air.
If you raise the attic temperature the rh in both places would be the same.
With our recent dry cold spell with sun throughout the day the levels would drop to the 50 s.
Dry air absorbs far more acoustical energy than does moist air.
Grinding noises are likely to be made by some type of rodent.
Fan noise is rated by sones it is the unit of measurement for evaluating how loud a bathroom fan is.
Likely culprits are rats mice grey squirrels and flying squirrels.
They may be chewing to improve passageways or just for fun.
An attic that stays overly humid for days or weeks on end can.
On the sone scale 0 5 to 1 2 sones means the fan is exceptionally quiet 1 5 to 2 0 sones is acceptable in many homes.
You might also install a humidistat that automatically turns your attic fan on to vent out humidity once the level exceeds 70 percent.
The electrical contractor in the equipment can also make a chattering sound which can damage other components including the compressor if allowed to continue.
Grinding noises are made as rodents chew woodwork.
Skittering sounds squeaks buzzes and other noises coming from your walls and attic may mean there s something living in your house that isn t part of your family.
The difference in the two spaces is the dry bulb temperature.
Grinding noise in the attic.
You simply set the desired humidity level turn on the unit and leave it running.