Here are a few things.
Furnace air flow loud.
If you notice something wrong such as the furnace not blowing hot air properly please take it seriously and call for furnace service from our.
Your blower motor forces the warm air out of your furnace and through the air ducts in your home.
In the room above the furnace room i used to measure 33dba noticeable noise at a distance of of 1m from one of the return air intakes and now i measure 28dba not noticeable.
The furnace may need greater air flow and thus larger ducts.
From dirty air ducts blocked damper valves damaged duct runs to an insufficient numbers of return air vents there are a variety of signs that may indicate a furnace air flow issue in your home.
I didn t want to add another filter behind.
This concept issue would be the same for a filter installed right at the furnace as well.
Loud furnace noises come from all kinds of reasons.
Loud hvac air return.
Loud blowing air and fan noise.
High static pressure is a common problem.
If the filter is too restrictive the noise will travel back up the ducting to the intake vent producing the same problem.
While every home is different and requires a unique fix here are some of the most common solutions to air noise resulting from high static adjust the fan speed.
The problem is to understand the cause and from there see how the situation can be remedied.
If you are hearing loud screeching and rattling noises when you turn your furnace on the bearings in the blower motor or the blower motor itself could be to blame.
Your blower or furnace fan should be set to deliver the proper airflow per ton.