Cabin filter restricting air flow replaced.

[Bailey28]

The previous owner of my Dodge Charger installed a Bosch HEPA cabin air filter at some point. The filter looked fairly clean so I reinstalled it after inspection. I have noticed the fan speed needed to be cranked up on high to get acceptable air flow from the dash vents which got me thinking maybe there is a restriction somewhere.

I kept the fan on high and took a peek under the hood where the filter is located and noticed the cabin air filter was wrinkled and collapsed inward! I pulled the cabin air filter out and my airflow increased a ton.

I found a cheap paper Fram cabin air filter on closeout at AAP which flows great. No more HEPA filters for me.

 

[pudge]

i tend to think the Hepa filters are more restrictive by nature

 

[Hall]

Learned the same lesson with my furnace at home. I was using those thicker, ultra-filtering filters and it ended up tripping one of the limit switches. My HVAC told me just buy the $3-4 filters and replace them every 30 days, which I've been doing for years now.

 

[kschachn]

Learned the same lesson with my furnace at home. I was using those thicker, ultra-filtering filters and it ended up tripping one of the limit switches. My HVAC told me just buy the $3-4 filters and replace them every 30 days, which I've been doing for years now.

The notion that your HVAC filter is a whole-house air filter is a bit of a stretch for me too. It's there to protect the blower motor and A coil from clogging.

 

[rszappa1]

Learned the same lesson with my furnace at home. I was using those thicker, ultra-filtering filters and it ended up tripping one of the limit switches. My HVAC told me just buy the $3-4 filters and replace them every 30 days, which I've been doing for years now.

Yup....I use a MERV 5 or less filter on my HVAC...

 

[Geekhead]

The previous owner of my Dodge Charger installed a Bosch HEPA cabin air filter at some point. The filter looked fairly clean so I reinstalled it after inspection. I have noticed the fan speed needed to be cranked up on high to get acceptable air flow from the dash vents which got me thinking maybe there is a restriction somewhere.

I kept the fan on high and took a peek under the hood where the filter is located and noticed the cabin air filter was wrinkled and collapsed inward! I pulled the cabin air filter out and my airflow increased a ton.

I found a cheap paper Fram cabin air filter on closeout at AAP which flows great. No more HEPA filters for me.

Applies to furnace filters too