I've owned an ipf 9400 for about 7-8 years, and it's at about 90,000 sq feet and still working great-- at about 75,000 we had a problem with the FFC cable assembly coming loose and tearing, which was a very involved replacement (did it myself, bought an ipf 9000 assembly for about $150, luckily it was the exact same). But in general the machines are great, and 5,000 is a pretty low number-