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Gas Furnace Filter Location
QUESTION:We have a new Trane gas furnance.
The filter location is in the house's air return duct, however the manual
indicates there are filters inside where the duct for the outside fresh air is.
Any ideas on the pro/cons of where the filter should be. The installer says the
unit should only have 1 filter, otherwise the air flow is too restricted. They
think the return duct filter is the better place for the filter.
Thus far I have come up with the following Pros for having the filter in the
house's air return duct.
1) Appears to be easier to change filter
2) Air is refiltered more times.
The Con I have come up with isir
1) Dirt/Pollen from outside fresh air duct (although minimal) goes through the
ducts and furnance and into the house once, and then is filtered by the return
filter.
2) Trane designed it to have filters inside the furnace.
ANSWER: They do have a return filter grill. They said they do not install the filter
inside the furnace becuase if they did, 2 filters would cut the air flow down
too much, plus they are darn near impossible to access.
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