Most facility managers don't think about their AHU blower fan until it stops behaving. It runs in background day after day. Moving conditioned air through your building without asking for much attention. Then one day, electricity bill looks off. Or sound coming from the plant room changes. Or a repair that should've taken an hour drags into a full day of troubleshooting. Here's the thing - by the time AHU blower fan announces its problems loudly, it's usually already cost you