Florida generator guide

A Tech Says Your Generator Sits Too Close to the House. Does It Have to Move — and Who Pays?

A tech glances at your generator, says it sits too close to the house, and now you're staring at a 400-pound box that's run fine for two hurricane seasons wondering what this is about to cost you. Here's the thing that flips the whole answer before you panic: "too close to the house" can mean two completely different measurements, and only one of them is actually a problem. The gap to a blank wall can be about a hand-width and still be fine. The gap to a window you can open is the one that has to be five feet. Which one he's pointing at decides whether anything moves — and who's holding the bill.

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Two kinds of "too close" — and only one of them is trouble

Most people picture a generator needing to sit way out in the yard, far from the wall. That's not quite how it works. The air-cooled Generac units most Florida homes run were put through fire testing (by an outside lab called Southwest Research Institute), and that testing is why the back of the unit — where the gas and electrical come in — is allowed to sit about 18 inches off a solid wall. Roughly a hand-width and a half. So a generator tucked close to the siding isn't automatically wrong.

The measurement that actually trips installs is a different one. Any window you can open, any door, any vent or dryer exhaust or fresh-air intake has to be at least five feet from the unit — think about the length of a twin bed laid on the ground between the box and that window. That's the rule people blow past, because at install time the generator goes wherever the gas line and the panel are easiest to reach, and nobody's looking up at the bathroom window three feet overhead.

So the first question isn't "how far from the house." It's "what is it close to." Close to a blank stucco wall, probably fine. Close to a window that cranks open, that's the one a tech will flag.

Why five feet from a window isn't just a suggestion

A running generator breathes out exhaust, and exhaust is carbon monoxide. The five feet isn't about fire on the wall — it's about giving those fumes room to scatter into the open air before they can find a window, a vent, or a soffit and drift back inside where you're sleeping. Shove the unit up under an openable window and every weekly self-test is quietly puffing exhaust toward the one gap in your house.

There's a second thing techs catch that homeowners never think about: the exhaust side needs breathing room too. One install people kept pointing at online had a wood privacy fence sitting inches off the exhaust end — slow-roasting itself every time the generator ran its test, and choking the airflow the engine needs. A generator crammed against a fence or hedge also means that if it ever does catch fire, nobody can get to it.

And this is where it gets genuinely murky for Florida homeowners, because the manufacturer's numbers are the floor, not the final word. Your local building department — the authority having jurisdiction — can require more, and whatever they say wins over the brochure. That's why two neighbors can get two different answers from two different inspectors.

So who pays — and why the next guy may not want to touch it

This comes down to one question: was a permit ever pulled? If the original company pulled a permit and an inspector signed off, and it turns out the placement was wrong, that's the installer's miss to correct. If no permit was ever pulled — which is common, and exactly how these bad installs happen — you can get red-tagged, and now you're the one chasing a fix. In one widely reported case a couple got hit with a five-figure fine over improperly installed whole-home generators. The contractor who did it cheap is often long gone or uninsured, and small-claims court only helps if you can still find him.

That's also the real reason the next tech hesitates. Once a company puts hands on someone else's non-code install and powers it back up, they can inherit responsibility for the whole thing — the part they touched and the parts they didn't. Installers online split hard on this exact point: some say walk away and make the homeowner start clean, others say flag it in writing and fix what you can. Neither camp is eager to quietly sign their name to another outfit's shortcut.

So before you argue about whether it moves, you want a straight read on two things: how close it actually is to a real opening, and whether there's a permit history on it at all.

Get the one number that ends the guessing

Every answer above bends on details only your actual yard can settle — where that window sits, what your county inspector wants, whether the exhaust has room to breathe. That's why a phone quote for "a generator" is close to meaningless.

GENERasic works the other way. Tell us your address and what you're trying to keep running, and you get one committed installed price for your specific house — placement that clears the windows and the code, permit handled, the whole thing — not a range you'll argue about later when a tech shows up and finds the real site. If you're sitting there wondering whether yours has to move, the fastest way to stop guessing is to get your price for doing it right the first time.

Common questions

How far does a standby generator actually have to be from the house?

Two separate measurements. The back of a tested air-cooled Generac unit can sit about 18 inches from a solid wall. But any openable window, door, vent, or air intake has to be at least five feet away. Your local Florida building department can require more, and their rule wins over the manufacturer's minimum.

Can a generator legally sit right up against the wall of my house?

Close to a blank, solid wall — roughly 18 inches off the back — is generally allowed, because the common air-cooled units were fire-tested for exactly that. What's not allowed is sitting within five feet of a window you can open, a door, or a vent, because that's how exhaust finds its way back inside.

If it was installed too close, do I pay to move it or does the installer?

It usually hinges on whether a permit was pulled. If the company permitted the job and an inspector approved it, correcting a wrong placement is on them. If no permit was ever pulled, you can get red-tagged and end up paying to fix it yourself — especially if the original installer is gone or uninsured.

Why won't another company just come fix a generator that's installed wrong?

Because once a tech works on someone else's non-code install and powers it back up, they can take on responsibility for the whole setup, not just the piece they touched. Some will do it if they can document the problems and correct them; others would rather you start with a clean, permitted install than inherit another outfit's shortcuts.

Does Florida require a permit for a whole-home generator?

In almost every Florida jurisdiction, yes — a standby generator install needs permits and inspection for the electrical and gas work, and the local authority having jurisdiction sets the final clearance rules. A permitted, inspected job is also your protection if placement is ever questioned down the road.

Stop reading ranges. Get your number.

GENERasic pulls the real property, flood, and elevation data for your exact address and returns one all-in installed price — sized to your home, your fuel, and your flood elevation. The vetted local installer confirms it on site.

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