Tybo Posted February 19, 2012 Report Share Posted February 19, 2012 I replaced the furnace this year and I was wondering if I could use a element filter on the air intake. I would still use the furnace filter also. Link to comment Share on other sites More sharing options...
mercman Posted February 19, 2012 Report Share Posted February 19, 2012 I waited to see if any experts chimed in before posting. I'm no expert on furnaces, but i do know a little about airflow. Anytime you put an obstacle in a flow environment, whether liquid, or in your case air, you will either speed up, or slow down the flow. In this case, a filter media may slow down airflow in the heating chamber and cause the furnace to overheat. I"m not saying this will happen for sure, just logically speaking. Paul Link to comment Share on other sites More sharing options...
NARDA1 Posted February 19, 2012 Report Share Posted February 19, 2012 I'm no pro either but I've used a 1 inch thick pleated filter on the air return grille along with the 3 inch filter that is located at the furnace with no issues. Link to comment Share on other sites More sharing options...
Tybo Posted February 19, 2012 Author Report Share Posted February 19, 2012 I'm no pro either but I've used a 1 inch thick pleated filter on the air return grille along with the 3 inch filter that is located at the furnace with no issues. It's not the filter in the house I'm asking about,But the fresh air induct.Kind a like a cold air induction on a engine.Element filters are washable.This way it would help to prolong the filter in the furnace keeping cost down on filter changes.For I would not be sucking in dust from outside. Link to comment Share on other sites More sharing options...
NARDA1 Posted February 19, 2012 Report Share Posted February 19, 2012 There should be no reason to filter that air, unless you are in a very dirty / dusty enviroment because it is only used for cumbustion. any debris would be burned. Link to comment Share on other sites More sharing options...
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