Generac Next Gen 14kW Air-Cooled Home Standby Generator — Model 7258
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At a glance
- Standby Power
- 14 kW LP / 14 kW NG
- Voltage/Phase
- 120/240V, single-phase, 60 Hz
- Fuel
- Dual-fuel: Natural Gas or Liquid Propane (field-selectable, EFIC electronic fuel control)
- Engine
- Generac G-Force 800 Series, 816cc, OHV with hydraulic lifters
- Cooling
- Air-cooled
- Sound Level
- 65 dBA at 23 ft (normal operation); 55 dBA in Quiet-Test exercise mode
- Connectivity
- Built-in cellular Mobile Link (Wi-Fi and Bluetooth included)
- Controller
- Power Zone 200 with electronic oil sensing and gas pressure monitoring
- Dimensions
- 46.4" L x 26.3" W x 30.7" H
- Weight
- 391 lbs
- Warranty
- 5-year limited warranty
Product specs
- Dimensions
- 46.4 x 26.3 x 30.7 in
- Weight
- 391 lbs
- Key specs
- Rated output: 14 kW Engine: Generac G-Force, 817cc Cooling: Air-cooled Sound level: 65 at 23 ft (normal) / 55 (Quiet-Test) Fuel: Natural gas or LP
Why this generator
- Full 14 kW output on both natural gas and propane - no power derating when running on NG
- Next Gen G-Force 800 engine with Electronic Fuel and Ignition Control (EFIC) for higher output, better fuel economy, and lower emissions
- Utility-grade power with less than 5% THD - safe for HVAC, electronics, and smart-home devices; load acceptance strong enough to start a 5-ton A/C
- Built-in cellular Mobile Link monitoring standard (plus Wi-Fi and Bluetooth) - check status and get alerts from anywhere
- Quiet 55 dBA self-test mode and all-aluminum enclosure rated for 150 MPH winds; approved for installation as close as 18 inches from the home
- Backed by Generac's 5-year limited warranty
Everything you need to know
Generac Next Gen 14kW air-cooled home standby generator (model 7258). Generac's newest generation with the purpose-built G-Force engine, dual fuel (natural gas or LP), 50-state compliant.
Genuine Generac unit from a factory-authorized dealer. Free shipping to the lower 48. Professional installation available in NC & SC.
Frequently asked questions
What fuel does the this generator run on?+
The unit runs on natural gas or LP (propane), selectable at install.
Does the price include installation?+
No — the online price covers the unit shipped free to the lower 48. Professional installation is available in NC & SC on a quote basis; outside that area we'll help you find a qualified local installer.
How fast does it ship?+
Free curbside / liftgate shipping to the contiguous 48 states. Typically ships in 1 to 2 weeks.
What warranty is included?+
5-year limited factory warranty, registered and supported directly through Generac.
Is financing available?+
Yes — 0% APR financing is available on qualifying orders. Ask us for details before checkout.
Free curbside shipping
Liftgate delivery to the lower 48. Typically ships in 1 to 2 weeks.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Generac warranty
Full 5-year limited warranty — registered and supported through Generac directly.