Air-Cooled
Standby Generators
The most popular choice for Florida homeowners. Affordable, reliable, and automatic — air-cooled generators from Generac keep your home powered through any storm.
The Right Generator for Most Florida Homes
An air-cooled standby generator uses a fan to circulate air over the engine — the same proven technology used in small engines for decades. Unlike liquid-cooled generators (which use a radiator and coolant like a car), air-cooled models are simpler, more affordable, and easier to maintain.
For homes under 3,500 square feet, an air-cooled generator in the 10–22 kW range provides complete whole-home coverage — including central AC, refrigerator, water heater, lights, and all your essential appliances.
Paired with an automatic transfer switch (ATS), your generator detects an outage and starts within seconds — no running outside in a storm, no manual switching. Just seamless, uninterrupted power.
Air-Cooled Engine
Simple & proven
Auto Transfer Switch
Starts in seconds
10–22 kW Range
Right-sized for homes
Generac Warranty
5-year factory coverage
6 Reasons Homeowners Choose Air-Cooled
Lower Upfront Cost
Air-cooled generators are significantly less expensive than liquid-cooled models — making whole-home backup power accessible for most residential budgets.
Simple, Proven Design
Fewer moving parts means fewer things that can go wrong. Air-cooled engines have been powering homes for decades and are easy to service and maintain.
Easy Maintenance
Annual tune-ups are straightforward — oil change, spark plugs, air filter, and a load test. No coolant system to flush, no radiator to inspect.
Perfect for Most Homes
For homes under 3,500 sq ft, an air-cooled generator in the 10–22 kW range handles everything from central AC and refrigerators to lights and medical equipment.
Automatic Standby Power
Paired with an automatic transfer switch, your air-cooled generator detects an outage and starts within seconds — no manual intervention required.
Generac Factory Warranty
As a Generac authorized dealer, we install units backed by Generac's 5-year limited warranty. You're covered from day one.
Which Size Is Right for You?
Choosing the right generator size is critical. Too small and you won't power everything you need. Too large and you're paying for capacity you'll never use. We offer no-charge on-site load assessments.
Our entry-level whole-home solution. Handles central AC, water heater, kitchen appliances, and all lighting. The most popular size for Florida homes. Guardian 18kW and NextGen 18kW available.
For larger homes up to 3,500 sq ft. Handles two large AC units, electric ranges, and high-demand appliances. Guardian 22kW and NextGen 22kW available.
NextGen 24kW — ideal for homes with high electrical demand, electric vehicle chargers, or large HVAC systems. Quieter and more fuel-efficient than previous generation models.
NextGen 26kW — top-tier air-cooled capacity for large homes. Handles virtually any residential load including multiple AC units, pools, and home offices with heavy equipment.
NextGen 28kW — the most powerful air-cooled standby generator available. For the largest homes or light commercial applications that need maximum backup power without liquid cooling.
Prices are estimates only. Final cost depends on your electrical panel, gas line distance, local permit fees, and site conditions. Call us for a no-charge, no-obligation quote — 844-432-8622.
Air-Cooled vs. Liquid-Cooled
Not sure which is right for you? Call us — we'll help you choose based on your home size and budget.
Generac Guardian & NextGen Air-Cooled Generators
Double A is a Generac authorized dealer. We install and service both the Guardian and NextGen series — the two premier air-cooled standby generator lines for residential use.
Generac Guardian Series
Available Sizes: 18kW · 22kW
The Generac Guardian is the industry-leading residential standby generator. Proven reliability, automatic operation, and a 5-year limited warranty make it the most dependable name in home backup power. The Guardian connects directly to your natural gas or propane supply and starts automatically within seconds of an outage.
- OHVI® engine — purpose-built for standby use
- True Power™ Technology for clean, stable electricity
- Wi-Fi enabled Mobile Link™ remote monitoring
- Aluminum enclosure — rust-proof, weather-resistant
- 5-year limited warranty (parts & labor)
- Available in 18kW and 22kW
Generac NextGen Series
Available Sizes: 18kW · 22kW · 24kW · 26kW · 28kW
The Generac NextGen is the next evolution in air-cooled standby power. Featuring a redesigned engine, quieter operation, improved fuel efficiency, and expanded capacity up to 28kW — the NextGen delivers more power in a more refined package. Ideal for larger homes and higher electrical demands.
- Redesigned engine — quieter & more fuel-efficient
- Expanded capacity: up to 28kW air-cooled
- Advanced True Power™ Technology
- Wi-Fi enabled Mobile Link™ remote monitoring
- Larger transfer switch options available
- 5-year limited warranty (parts & labor)
- Available in 18kW, 22kW, 24kW, 26kW & 28kW
Prices are estimates. Final cost depends on panel, gas line, permits & site conditions. Call for a no-charge quote: 844-432-8622
What Our Customers Are Saying
"Double A installed a Generac 18kW air-cooled generator at our home last spring. The whole process — permit, gas line, electrical hookup — was handled by their team. When Hurricane Debby knocked out power for four days, we never even noticed. Best investment we've made."
Mark T.
St. Johns, FL
"I was nervous about the cost but Double A walked me through the financing options and helped me pick the right size. The 18kW Generac handles our whole house. Installation was clean and done in one day. Couldn't be happier."
Sandra R.
Nocatee, FL
"My wife is on a CPAP machine and we needed reliable backup power. Double A recommended the 18kW air-cooled unit and it's been flawless. They even set up the weekly self-test so we know it's always ready. Professional, knowledgeable team."
James W.
Palm Coast, FL
Common Questions About Air-Cooled Generators
What is an air-cooled generator?
An air-cooled generator uses a fan to circulate air over the engine to dissipate heat — similar to how a lawn mower engine works. This is in contrast to liquid-cooled generators, which use a coolant system like a car engine. Air-cooled models are simpler, less expensive, and perfectly suited for most residential applications.
How long can an air-cooled generator run continuously?
Most air-cooled standby generators are rated for continuous operation during an outage. Generac recommends running them no more than 500 hours before a maintenance check, but during a typical Florida storm outage of 1–5 days, you'll have no issues. For extended outages, we recommend scheduling a mid-run oil check.
How loud is an air-cooled generator?
Air-cooled generators typically run at 66–70 decibels at 23 feet — roughly the volume of a normal conversation or a window AC unit. Generac's quieter models with sound-attenuated enclosures can run as low as 62 dB. We can help you choose a placement and model that minimizes noise impact on your neighbors.
Do I need a permit to install a standby generator in Florida?
Yes. In Florida, standby generator installations require an electrical permit and, in most cases, a gas permit. Double A handles all permitting on your behalf — we are licensed electrical and HVAC contractors in St. Johns, Flagler, and Duval County.
What size air-cooled generator do I need?
For most Florida homes under 2,500 sq ft, an 18kW air-cooled generator (Guardian or NextGen) provides whole-home coverage. Larger homes may need a 22kW, 24kW, 26kW, or 28kW NextGen model. We offer no-charge on-site load assessments to size your generator correctly — call 844-432-8622 to schedule.
How often does an air-cooled generator need maintenance?
Generac recommends annual maintenance for standby generators — or every 200 hours of run time, whichever comes first. A standard tune-up includes an oil and filter change, spark plug inspection, air filter replacement, battery test, and a full load test. Double A offers generator maintenance plans to keep your system ready year-round.
Ready to Stop Worrying About Power Outages?
Call Double A today for a no-charge generator sizing consultation. We'll assess your home's electrical load, recommend the right Generac model, and give you an upfront written quote.