In February 2022, a three-day ice storm knocked out power to our building for 62 hours. We lost about $28,000—spoiled product in the walk-in coolers, two days of halted manufacturing, and a client call I'd rather not relive. By the time the lights came back, our operations director had already forwarded me an email with the subject line: "Generator. Now."
I'm the office administrator. I handle vendor relationships, purchasing, and the kind of operational fire drills that don't fit neatly into anyone else's job description. I manage roughly $80,000 in facilities spending annually across nine vendors. I report to both operations and finance. What I am not is an electrician.
So when I started looking at backup generators, I did what I always do: opened three browser tabs and hoped for the best.
The Questions I Didn't Know I Had
My first search, honestly, was "how long can i run a generac generator." I think I was trying to sound competent in a meeting where I had no business pretending to be. The results were more complicated than I expected.
It turns out the answer depends entirely on what kind of generator you're talking about. A portable gasoline unit might run 8-12 hours on a tank, depending on load. A permanently installed standby generator connected to a natural gas line runs essentially as long as the gas keeps flowing. One appliance salesperson told me his residential customers treat it as unlimited, as long as the utility doesn't lose gas pressure—which, he admitted, almost never happens during the storms that knock out electricity.
That distinction cost us weeks of internal debate. Our CFO wanted portable (cheaper). Our operations director wanted standby (reliable). I had no idea which one was right, and I said so in a meeting that got uncomfortably quiet.
How the Thing Actually Works
I eventually called a local dealer who specializes in Generac installations. He came out, looked at our panel, and spent about 45 minutes explaining how does generac generator work on a house—or in our case, a commercial building.
The short version: a standby unit sits outside, wired into your electrical panel through a piece of equipment called an automatic transfer switch. When the grid fails, the switch detects the outage, starts the generator, and routes power from the generator to your building. When the grid comes back, it reverses. The whole handoff takes a few seconds. Generac's documentation describes the same sequence for residential and light commercial systems, though the switch specs vary by load.
He recommended a 22kW natural gas unit for our size. We installed it in May 2022. Total cost, including the switch and permits, came in around $11,400. The CFO wasn't thrilled, but the math worked compared to another $28,000 outage.
Here's the part I didn't appreciate until later: installation is the easy bit. Keeping the thing running is where most people—including me—get blindsided.
The Air Filter Rabbit Hole
Our service contract included an annual tune-up, but by the following spring I was trying to understand basic maintenance. Generac's maintenance schedule recommends checking the air filter roughly every 100 hours of operation, or at least annually, with more frequent checks in dusty environments.
Cleaning is straightforward: remove the cover, take out the filter, tap it gently to dislodge debris, and replace it if it's discolored or damaged. People on forums asking how to clean an air filter got a dozen different answers—wash it, don't wash it, oil it, don't oil it—so I called the dealer and asked what he actually recommended. He told me he sees more engines damaged by skipping this step than by almost any other user error.
People kept mentioning "lifetime air filters"—the reusable kind you wash and re-oil instead of replacing. The dealer said those work fine if you actually maintain them, but most people don't, so he recommends disposable. I appreciated that. He had no reason to push me toward the more expensive option. He was just telling me what he sees in the field.
I still kick myself for not asking about the maintenance schedule during the installation. I assumed the service contract covered everything. It did—but the air filter was mine to manage between visits, and I didn't realize that until almost a year later.
The Spark Plug That Wasn't
And then there's the story I keep coming back to. Our facilities team also maintains a Husqvarna 450 Rancher chainsaw they use for tree trimming around the parking lot. When it started running rough, I figured I'd kill two birds: call the generator dealer about our Husqvarna 450 Rancher spark plug while I was at it.
The guy on the phone didn't miss a beat. "We don't carry Husqvarna parts—we only do Generac. For the 450 Rancher, you want an NGK BPMR7A. Can I give you the number for Equipment Depot? They'll know exactly what you mean."
I don't remember what else I asked in that call. But I remember hanging up thinking, That's a vendor I can trust.
Here's why it mattered. I'd been conditioned by years of purchasing to expect vendors to say yes to everything. Need a spark plug? Sure. Need a tune-up? Sure. Need a different brand? We can get that. In my experience, "yes" usually meant "we want your business."
This guy said no—politely, specifically, and with a referral to someone who actually did have the part. He knew what he was good at and what he wasn't. And that made me trust everything else he'd told me.
What I Learned About Expertise
We had another outage this past December—about 30 hours this time. The generator kicked in, ran cleanly, and our operations director barely noticed. I checked the air filter in the spring, swapped it for a new one, and marked my calendar for next year.
Looking back, the thing I got wrong at the start wasn't technical. I assumed I needed a vendor who could do everything. I wanted one company for generators, one for small equipment, one for maintenance, all of them saying yes to every request.
What I actually needed—what I now look for in every vendor relationship—is someone who knows their limits. A company that can say "that's not our area, call these folks" is telling you something important: they're not going to pretend, fudge the answer, or hand you a part that doesn't quite fit because they didn't want to lose the sale.
To be fair, not every vendor who says yes is a bad actor. Some genuinely have broad capabilities. But after watching our dealer turn down a small parts sale to protect his credibility, I'm a convert. It's the ones who admit they don't know everything who make me feel like I'm not going to find out the hard way later.
Here's what you need to know if you're managing facilities or equipment purchasing: the next time a vendor says "we don't do that," pay attention. That's not a limit. That's a credential.
