How Far Should a Portable Generator Be From Your House?
During the blizzard, we had one day of partial power and three—almost four—days without electricity. That experience got us researching off-grid power systems, including generators and solar setups. When you have spent several days waiting for the power to come back, having your own backup starts looking pretty good.
But there is more to owning a generator than checking the wattage and keeping a gas can handy. You need a safe place to run it, a proper way to connect it, and a plan everyone in the household understands.
A fuel-powered portable generator belongs outdoors, at least 20 feet from homes and buildings, with the exhaust pointed away from doors, windows, and vents. That is the placement guidance from the U.S. Consumer Product Safety Commission. CPSC.gov
Let’s talk about what that means when you are standing in your yard trying to figure out where everything goes.
Why does the 20-foot distance matter?
A generator’s engine produces carbon monoxide. You cannot see or smell that gas, and an open window gives it a way into the house. The engine may be outside while the people inside are still exposed. The CDC’s power-outage guidance specifically warns against running a generator within 20 feet of a door, window, or vent. CDC
Before you pick a spot, walk around the house. Look at the doors, windows, and vents near it. Look at the neighbor’s house, too. Pointing exhaust away from your kitchen does little good if you point it toward somebody else’s bedroom.
Measure the distance instead of guessing. Then check the instructions for your particular generator. Twenty feet is a minimum, not a guarantee that every spot beyond that distance is suitable. The layout of the property and the direction of the exhaust still matter.
This is a good job for a normal Saturday afternoon. You have daylight, you have time, and nobody is standing behind you asking when the refrigerator will be running again.
Can you run it in an open garage or under the carport?
No, folks. Opening the garage door does not turn the garage into a safe generator location. Keep it out of garages, sheds, porches, carports, and other enclosed or partially enclosed spaces. Exhaust can collect or find its way into the house. CPSC.gov
You can see how the decision happens. It starts raining. The cord will not quite reach. Somebody is worried about the generator getting stolen. Moving it closer feels like a quick fix, especially when everyone is cold, tired, and ready for something to work.
That is why you decide where it will run before you need it.
Wet weather needs its own preparation. Follow the manufacturer’s directions for keeping the generator dry during operation. A cover intended for storage may not be suitable while the engine is running. Any operating shelter must preserve the required airflow and clearances; wrapping a tarp around the machine is not a substitute for a proper setup. OSHA’s generator guidance addresses dry operation and canopy protection. osha.gov
Does a carbon monoxide shutoff make it safe?
A built-in carbon monoxide shutoff is worth having. It is still a backup safety feature, and correct placement remains necessary.
CPSC recommends working carbon monoxide alarms on every level of the home and outside sleeping areas, with batteries or battery backup. Test them monthly. A power outage is a poor time to discover that the alarm you were counting on does not work. CPSC.gov
Carbon monoxide poisoning can cause headache, dizziness, weakness, nausea, vomiting, chest pain, and confusion. Those symptoms can be easy to dismiss when you already feel worn out from dealing with an outage. People who are asleep may never recognize the danger. CDC
If the alarm sounds, get everyone outside immediately and call 911. If you suspect poisoning, get to fresh air and seek emergency help. Stay out until trained responders say it is safe. Do not spend those first minutes looking for the source or trying to save what is in the refrigerator. CPSC.gov
How do you get power into the house safely?
Never plug a generator into a household outlet to send electricity backward through the wiring. That practice, called backfeeding, can energize utility lines and put the people repairing your power at risk of electrocution.
If you want to supply the home’s wiring, have a qualified electrician install the proper transfer equipment. For individual appliances, use intact, grounded, outdoor-rated cords sized for the load and cord length. Do not overload the generator. osha.gov
A cord that is too short means you need to solve the cord problem. It does not mean the generator gets moved beside the back door. CDC recommends a cord longer than 20 feet so the machine can remain safely separated from the house. CDC
Read the manual and work out what you need to power before the outage. Make sure someone else in the household understands the setup, too. A plan that only works when one particular person is home has a weak spot.
That is also the thinking behind our article, Should You Shut Off Gas, Water, or Electricity After a Disaster?. Learn how your equipment works and recognize which jobs belong to a qualified professional.
What about refueling?
Shut the generator off and let it cool before adding fuel. Spilled fuel can ignite on hot engine parts even after the engine has stopped. Store fuel in approved, labeled containers away from living areas, heat, and ignition sources. Follow the manufacturer’s instructions and local storage requirements. osha.gov
Build that cooling time into your expectations. After hours without power, it is tempting to rush anything that interrupts the few appliances you have working. Knowing that refueling requires a shutdown makes it easier to plan around.
What should you do before the next outage?
Walk the property and identify a suitable operating location. Measure it. Work out the cord route or arrange the electrical installation. Test your carbon monoxide alarms, read the manual, and make sure the family knows how to shut the generator down.
At Squatch, we talk a lot about knowing your equipment. That applies just as much at home as it does on the trail. Owning useful gear is a start; understanding how to use it is what makes it useful when the day goes sideways.
Save this page to your phone for a quick reference, Squatchamaniacs. Download it for offline use or take screenshots so you can read it even when cell service or Wi-Fi is down. Keep your generator’s manual available, too.
Read it now, walk through your setup, and make sure someone else in the household knows the plan. Skills weigh nothing—and knowing how to use your equipment safely is worth carrying everywhere.