Generac Air-Cooled Generators & Guardian Series Installation in Ohio
The Guardian Series: permanently installed, automatic home standby generators on your home's natural gas or propane, installed by a Generac Power Pro Prestige dealer.
Air-Cooled
Why Choose Air-Cooled Backup Power?
Air-cooled Guardian Series generators are the units Generator One installs behind most Ohio homes: permanently mounted, automatic and fueled by the home’s natural gas or propane. Homes and businesses that need more than the air-cooled line carries move up to liquid-cooled models.
Sized to Your Loads
A smaller unit carries the essentials through an Ohio outage; a larger one, or a mid-size unit with load management, carries the whole house. The load calculation at your free estimate decides it.
One Compact Enclosure
Guardian units from 10kW to 26kW share a 48 by 25 by 29 inch enclosure, set on a pre-formed concrete pad that carries a lifetime warranty.
Nothing to Refuel
The generator runs on natural gas or propane, so it keeps going through a long outage, and its weekly self-test runs in a quieter low-speed mode.
Models
Popular Air-Cooled Generac Models (Guardian Series)
Generator One sells and installs every Guardian size, from Generac's current home standby line (generac.com, October 2026), and sizes yours from a load calculation.
10kW Guardian Generator
Essential circuits
Runs the circuits a household cannot do without in an outage: the furnace blower, the refrigerator, the sump pump and the lights.
Get Pricing14kW Guardian Generator
Essential circuits
The same essentials with headroom to spare, for a smaller home or a condo with one air conditioning zone.
Get Pricing18kW Guardian Generator
Essential circuits to whole house
Enough to start a five-ton air conditioner, and the whole house when it is paired with a load-shedding switch.
Get Pricing22kW Guardian Generator
Whole house, most homes
22kW on propane and 21kW on natural gas: whole-house backup for most homes under 3,000 square feet with one central air conditioner.
View Details24kW Guardian Generator
Larger homes
More output in the same enclosure, for homes of 3,000 to 4,500 square feet running two air conditioners.
Get Pricing26kW Guardian Generator
Larger homes
Whole-house coverage for larger homes with several heating and cooling zones.
Get Pricing28kW Generac Generator
Largest air-cooled
The top of Generac's current air-cooled home line: 28kW on propane, 25kW on natural gas.
Get PricingInstallation
Precision Installation for Every Guardian Series Generator
One Generator One team takes a Guardian from the estimate to the startup test, with nothing handed to a subcontractor. See our generator installation process.
Load Calculation & Site
Our specialist gathers your outage priorities, runs the load calculation and measures the distances the unit needs from buildings and property lines.
Permits & Inspections
We apply for the permit before any work begins and schedule the inspections.
Licensed In-House Trades
Our own licensed electricians (Ohio #51095) and plumbers (Ohio #49326) do the electrical and fuel work, then register and test the generator before we leave.
Reviews
Trusted for Air-Cooled Generac Installations, Reviewed by Customers
Exclusive Power Plus Warranty 12 Years of Full Coverage
Every Generac air-cooled unit Generator One installs carries 12 years of full coverage: labor, travel, parts and major components, a $1,499 value, exclusive to Canter Power Systems brands.
*Financing through Synchrony Bank, subject to credit approval. See financing options.
See the WarrantyCoverage
Air-Cooled Generac Installation Across Ohio
Guardian Series installation and service from the Mentor headquarters, across the ten counties from Ashtabula to Tuscarawas.
Always Free Estimates & Proposals
Ready to Find Your Air-Cooled Generator? Request Your Free Estimate
A Generator One specialist sizes your home and gives you a free, no-obligation estimate. Call Sales at (855) 929-6620 or schedule online.
