HVAC Experts, Where is the filter?

[V4Cascade]

This unit is about 7-8 years old along the Central AC unit. They were both installed at the same time. I'm trying to find the furnace filter but where in the heck is it? It doesn't seem to have one? I can't find anything online and everything points to the furnace "should" have one otherwise it's going to damage the unit.

Also, there are 3 ducts throughout the home that pulls in air which has its own filter. Am I right to assume that since there are these 3 intake ducts the furnace doesn't require one?

The furnace is mounted horizontally on the garage ceiling. American Standard brand.

Thanks!

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[P7M13]

So each return duct has its own filter?
I worked in an office where the return air ducts held the filtration. Those things were always filthy.

 

[V4Cascade]

So each return duct has its own filter?
I worked in an office where the return air ducts held the filtration. Those things were always filthy.

Yes each return duct has its own filter.

 

[Xaevian]

@Stomper

 

[P7M13]

Yes each return duct has its own filter.

View attachment 1917533

Seems there's your answer.

 

[Stomper]

You have what are called, "filter-grills", and those are your filters.

If the filter was located at the air-handle it'd be on the right side end of your air handler (as shown in the photos) because the airflow is going from right to left (as shown in the photos).

Typically for residential equipment you don't use "dual banks" of filters because the blower design isn't strong enough to move enough air past the extra resistance of the filters.

Your system has the filters at each inlet which will help keep your return air (inlet air to the air handler) duct lines cleaner than if the filter was at the air handler. Unfiltered return air duct lines get FILTHY when the filter is at the furnace/air-handler.

Do yourself a favor and use the 2" thick version of whatever size filters you have there. Inside the wall cavity between the wall studs is typically 14"x25" (or maybe 24") x 2" (thick) pleated. It'll give you a larger filtration surface and also has less resistance to air flow that your blower has to overcome.

REPLACE THEM QUARTERLY, it'll prolong the life of the equipment!

The size of the filters should be printed on the edge of the paper frames, if not measure them, actual physical sizes are typically 1/4"-1/2" small than nominal (just like lumber).

BTW- that return air duct insulation on the right-hand side looks like a big ol' poopy diaper!

 

[Xaevian]

You have what are called, "filter-grills", and those are your filters.

If the filter was located at the air-handle it'd be on the right side end of your air handler (as shown in the photos) because the airflow is going from right to left (as shown in the photos).

Typically for residential equipment you don't use "dual banks" of filters because the blower design isn't strong enough to move enough air past the extra resistance of the filters.

Your system has the filters at each inlet which will help keep your return air (inlet air to the air handler) duct lines cleaner than if the filter was at the air handler. Unfiltered return air duct lines get FILTHY when the filter is at the furnace/air-handler.

Do yourself a favor and use the 2" thick version of whatever size filters you have there. Inside the wall cavity between the wall studs is typically 14"x25" (or maybe 24") x 2" (thick) pleated. It'll give you a larger filtration surface and also has less resistance to air flow that your blower has to overcome.

REPLACE THEM QUARTERLY, it'll prolong the life of the equipment!

The size of the filters should be printed on the edge of the paper frames, if not measure them, actual physical sizes are typically 1/4"-1/2" small than nominal (just like lumber).

BTW- that return air duct insulation on the right-hand side looks like a big ol' poopy diaper!

Right person for the right question.

 

[V4Cascade]

You have what are called, "filter-grills", and those are your filters.

If the filter was located at the air-handle it'd be on the right side end of your air handler (as shown in the photos) because the airflow is going from right to left (as shown in the photos).

Typically for residential equipment you don't use "dual banks" of filters because the blower design isn't strong enough to move enough air past the extra resistance of the filters.

Your system has the filters at each inlet which will help keep your return air (inlet air to the air handler) duct lines cleaner than if the filter was at the air handler. Unfiltered return air duct lines get FILTHY when the filter is at the furnace/air-handler.

Do yourself a favor and use the 2" thick version of whatever size filters you have there. Inside the wall cavity between the wall studs is typically 14"x25" (or maybe 24") x 2" (thick) pleated. It'll give you a larger filtration surface and also has less resistance to air flow that your blower has to overcome.

REPLACE THEM QUARTERLY, it'll prolong the life of the equipment!

The size of the filters should be printed on the edge of the paper frames, if not measure them, actual physical sizes are typically 1/4"-1/2" small than nominal (just like lumber).

BTW- that return air duct insulation on the right-hand side looks like a big ol' poopy diaper!

Thanks and much appreciated. I was losing my mind trying to find the damn things!

 

[Certaindeaf]

If you still have teeth the filtration efficiency of breathing through your mouth is 1 part per 10 is why this is important.