New picture...Heater with two filters

[David Nasser]

[Larry D. Kage]

I don't see the filters but the installation looks sloppy...loosely hanging thermostat wire...vent pipe too close to combustibles...no gas pipe (appliance connector only) through furnace cabinet...exposed fiberglass insulation wrap.

[Chuck Evans]

If the air must pass through both filters, it's probably not a good arrangement. I've seen an installation with multiple inline filters before. Big surprise the evaporator coil iced up for lack of airflow across the coil.

[David Nasser]

thanks