Rooftop air conditioner filter

Okay, thanks for the responses. I was uncertain as there is lining attached to the sheet metal cover on the condenser coil and thought that there might have been at one time a filter. Maybe the previous owners installed one? The unit is ducted and has the foam insulation. Issue solved and I won't worry about it, thanks again.

wa8yxm wrote:
Never was a filter. They do not make 'em with filters. Same for residential units. the only filter is on the condenser (inside) coils.

Other way around, Evap coil is inside (with filter) and condensor is outside. ;)
(I forget and mix them up myself..)

Never was a filter. They do not make 'em with filters. Same for residential units. the only filter is on the condenser (inside) coils.

Cleaning the AC the way you have done is something that should be accomplished annually anyway.

Whoah, it looks like I am around 7 years over due. :h

The sheet metal cover is typically over the evaporator coil (cold coil) and there is never a filter installed up there. What you are calling the exhaust coil is actually the condenser coil. The only filter there should be is the one you clean from the inside of you rig that is placed in the inlet of the airflow.

Cleaning the AC the way you have done is something that should be accomplished annually anyway. More so if you spend a lot of time in dusty climate.

A/Cs do not have a filter on the condenser(outside) coil, only on the evaporator (inside) coil.

We have an AC on our TC and one on our TT but there is no filter on either unit outside, only the foam on on the inside portion.

Cleaning it is what you should do. Do not impede the airflow by putting a filter where there was none. Make sure to clean the inside filter too. That one plugs up pretty quickly.

Is it a ducted or non ducted unit?

Make and model?

What filter did it come with from the manufacturer?

I had to do the same thing you did about a week ago. My unit has two blade-type reusable (washable) filters that I ordered online.