FHP Geothermal Pump Filter

[Concho]

We recently moved into a new house that has a FHP geothermal heat pump. I have been looking for the filter and can not find one. I looked at the info that came with it and had no luck. When I open it up, the air return enters by a large radiator grate looking part - not a filter. Is it possible that it does not have a filter?

By the way, We love this unit. Our electric bills were low this summer and our house stayed cool. I am waiting to see how it does this winter with heating.

 

[Concho]

Here is a link to our unit. In this document it looks like the filter is where the air return enters. However on our unit, the duct work is connected directly to the unit and then hits the radiator. I am wondering if it was not installed properly.

http://www.fhp-mfg.com/newpdfs/GS_GT/GT_Qu_ref.pdf

 

[titan]

Concho, look closely at the unit where the return air duct connects to it....on most units there is a tall,narrow door or slot that gives access to the air filter rack.Also trace all visible return air ductwork in case the installer placed a filter rack in-line there somewhere.Preferably, it should be right at the unit just in front of the air coil.