Are near filter within the smaller vent surrounded by my home? The main vent I modify but what about the vent in...
The main vent I modify but what about the vent in the other rooms?
Answers: If you lone have one return nouns supply and you are changing the filter on a regular idea you are fine. Each of the others are supply runs and they do not have filter.
Supply runs bring the heat (and cooling if you enjoy central air) to respectively room.