Retrofit 5" filter HVAC cabinet?
I am installing a new Lennox gas furnace (with new AC) in my walkout basement. I opted for the standard 1" filter, but was wondering whether it is possible to install the furnace such that a 5" filter cabinet could be easily installed at a later date.
The item itself seems cheap ($100): http://www.amazon.com/Lennox-HCC20-28-Healthy-Climate-Cabinet/dp/B004X4UNOM
But the HVAC contractor wanted $700, and said that later is would be $1700.