Storms & Outages
Portable vs standby generator for cooling
For most New Orleans homeowners, the choice comes down to how much cooling you need to guarantee and how automatically you need it to happen.
For most New Orleans homeowners, the choice comes down to how much cooling you need to guarantee and how automatically you need it to happen. A portable generator can run a window unit, a portable AC, or a mini-split during a daytime outage if you’re home to manage it, while a standby generator is built to start itself and keep whole-house or multi-zone cooling running even when you’re away — at a materially higher installation cost and complexity. Both approaches carry real carbon monoxide, fire, and electrical hazards that require care regardless of which you choose.
What each generator type actually does for cooling
A portable generator is a fuel-powered unit you place outdoors and connect to specific loads with heavy-duty extension cords. It’s a practical match for a single emergency cooling zone — a window air conditioner, a portable AC, or a small ductless mini-split — because those systems have a low enough power draw and start-up amperage to run on a modestly sized unit (BASC). If your goal is to keep one room livable during a summer outage rather than cool the whole house, a portable unit paired with a small, efficient system is often enough.
A standby (permanently installed) generator is wired into the home’s electrical system, typically through an automatic transfer switch, and can be sized to carry your whole-house HVAC system or several zones at once. The Building America Solution Center notes that your primary HVAC system can serve as your emergency cooling system if it’s reliable and paired with a whole-home backup power system large enough to handle the full load (BASC). That “large enough” sizing question is exactly why standby systems need professional load calculations rather than guesswork.
Installation and wiring
You can reasonably do this much on your own: list which cooling equipment you’d want to keep running (one window unit vs. central AC), check the equipment’s wattage and start-up amperage, and decide whether a single cool room meets your needs or whether you need whole-house capacity (BASC). Reducing your home’s cooling load — through shading, sealing, and similar measures — also shrinks the generator size you’d need (BASC).
What you should not do yourself is connect a generator directly to your home’s wiring. A licensed electrician needs to install a transfer switch or equivalent equipment in accordance with local electrical code, because backfeeding into household circuits can send dangerous surges out to utility lines and put line workers at risk of injury or electrocution (FEMA). This applies to both portable and standby setups whenever you’re powering built-in circuits rather than plugging directly into the unit.
What to check
Run any generator only outdoors, at least 20 feet from windows, doors, and attached garages — never in a garage, crawlspace, or other partially enclosed space, even with fans running (Ready.gov; FEMA). Install battery-backed carbon monoxide alarms on every level of the home, since CO is colorless and odorless (FEMA). Keep the generator dry, store fuel outside living areas in labeled safety containers, and let the engine cool before refueling to avoid ignition from spilled fuel (Ready.gov). Always use heavy-duty extension cords for portable connections, and follow the manufacturer’s instructions for your specific model (Ready.gov).
For broader guidance on generator options, see /storms/.
Sources
- Power Outages | Ready.gov, accessed 8/12/2026
- Use Generators Safely at Home | FEMA.gov, accessed 8/12/2026
- Emergency Air Conditioning and Food Refrigeration | Building America Solution Center, accessed 8/12/2026