Homeowner faces generator placement challenge despite having a half-acre lot

The setback concerns centered on two main dangers: carbon monoxide entering the home and fire spreading toward the house.

Even with half an acre of land, one homeowner discovered that finding a safe place for a generator can still be complicated. The generator inlet, gas line, and electrical panel were all located in a side yard only 16.5 feet wide, leaving little room to work with on an otherwise large property.

What to know

The homeowner was trying to determine whether the narrow side yard could accommodate the generator after learning that the recommended setback had changed from 10 feet to 25 feet. The roof soffits running along the overhang created an additional concern.

The homeowner described the situation in a Reddit post on r/Generator. Commenters explained that the spacing rules were mainly intended to reduce two risks: carbon monoxide entering the house and fire reaching the structure. One commenter also noted that other factors, including open windows, can affect safety.

In response, the homeowner said the nearby window was sealed shut and went to a shower. They also explained why the inlet had been placed there, saying, “This is where the gas line is (soon will be plumbed for quick disconnect) and main panel all in one spot, so it seemed appropriate at the time to put the inlet here as well.”

Several Reddit users pointed out that the issue involved more than just openings in the house. One asked how far the generator would be from the neighbor’s home, while another said some authorities require minimum clearances from “any door or window, not just yours.”

Another suggestion in the thread was to move the generator to the corner of the yard near the trash cans, but only if the exhaust could be directed so fumes would not collect in the tight space between the fence and the side of the house. The homeowner added that they planned to buy more carbon-monoxide detectors, in addition to the two already inside the home.

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What are the options?

The most practical alternative discussed was to place the generator farther into the backyard and compensate with a longer cord. According to the commenter who mentioned the fence, a 75-foot run would result in about a 1.5% voltage drop, while 100 feet would bring it to 2%.

Another idea kept the generator near the side-yard utility connections while using an exhaust extension to move fumes out of the “dead space” by the fence. That setup would allow the homeowner to use the 25-foot cord they already had and avoid needing “a really long gas hose or run a gas line extension.”

The homeowner said the generator would need to run on propane or gasoline for now, with propane preferred until a gas connection could be added. They also noted that the backup-power plan depended on installing a soft start system for the air-conditioning unit, which has a 120 locked-rotor-amps startup demand.

“This is a multistep process, with placement being my No. 1 priority at the moment,” the homeowner wrote.

Where to learn more

The related stories below examine similar generator setup issues, including setback requirements, carbon monoxide dangers, exhaust concerns, property-line disputes, and noise complaints.

• One homeowner learned that the 20-foot rule also applies near detached garages.
• After a carbon monoxide leak, a homeowner was warned that the standby unit’s location was unsafe.
• In the Pacific Northwest, a deck plan failed because of exhaust risk.
• In Texas, an owner worried that a generator near the property line could become dangerous.
• One homeowner measured a standby unit at 93 decibels, and tight side-yard walls made the noise problem worse.