1 inch vs. 4 inch media
I have started getting quotes to replace my furnaces and condensers. I am looking at the Carrier Infinity ICS variable speed furnace with the Infinity 17 condenser. My set up is two zone for a two story house (2 independent furnaces/condsensers).
The first company suggested going with a 1 inch media filter. Other companies are saying they always use a 4 inch media. The last company is saying the Carrier filter compartment can hold either a 1 inch or 4 inch filter.
Here are my questions:
Would I be making a mistake going with a 1 inch filter?
I realize the 1 inch will create greater static pressure, but won't the Infinity controller compensate for this?
Does the Infinity furnace come with the 4 inch media box?
If it does, why would an installer bother to create a duct to house a 1 inch filter?
I understand the 4 inch filter may require a yearly change versus a 3-4 time change with a 1 inch. Will the cost of the filters be about the same?