Hey Mike,
Good decision on the 95 percent furnace upgrade.
Since it looks like it's in a closet make sure if it has a closet door that's louvered. I can't tell from the picture, looks maybe like a pocket door.
Also since they used a one pipe venting system make sure you don't use or store any solvents, bleach or household chemicals near the furnace in the winter.
There has been a lot of problems with secondary heat exchanger failures in the past few years. Since it is a condensing furnace which cools the products of combustion so much , the water in the exhaust condenses out. If chemicals, particularly bleach (chlorine) are in air that the burner uses for combustion, the chemical reaction will eat the heat exchanger from the inside out, similar to a cars exhaust system. Class action lawsuits have convinced most manufacturers to revert to using stainless steel secondary heat exchangers, not polypropylene coated aluminum.
Damage may take a few years, but even warranty claims cost homeowners money.
TiM