The current Generac 14kW standby generator is aimed at homes that need more than a small essential-load system but do not need a 20kW-plus generator.
Current rated output:
- 14 kW liquid propane
- 14 kW natural gas
Unlike several larger Generac models, the current 14kW does not lose headline kW output when running on natural gas.
Generac 14kW questions answered: sizing, cost, fuel and maintenance
Generac 14kW Specifications (Manufacturer Data)
| Specification | Generac 14kW | Source |
|---|---|---|
| Models covered | G007258 (generator only); G007323 bundle with 200 A service-entrance transfer switch | 1, 2 |
| Rated output, natural gas | 14 kW | 3, 1 |
| Rated output, propane (LP) | 14 kW | 3, 1 |
| Engine | Generac G-Force 800, 2 cylinders, 817 cc, 3,600 rpm | 3 |
| Dimensions (L × W × H) | 46.4 × 26.3 × 30.7 in (117.9 × 66.8 × 77.9 cm) | 3, 1 |
| Unit weight | 391 lb / 177 kg | 3, 1 |
| Sound level | 65 dB(A) at 23 ft (7 m), normal load; 55 dB(A) in Quiet-Test low-speed exercise (measured from the front of the generator) | 3 |
| Natural gas use, ½ load / full load | 189 / 243 ft³/hr | 3, 1 |
| Propane use, ½ load / full load | 1.76 / 2.92 gal/hr (63 / 106 ft³/hr) | 3, 1 |
| Main line circuit breaker | 60 A | 3, 1 |
| Transfer switch options | Bundle G007323 includes a 200 A service-entrance-rated automatic transfer switch with integrated surge protection (NEMA 3R, US only) | 3 |
| Warranty | 5-year limited warranty, generator and transfer switch | 3, 1 |
| Starting MSRP | $4,889 generator only; $5,949 with transfer switch (G007323) | 1, 2 |
What the size and fuel figures mean for installation
Generac lists the 14kW for installation as close as 18 in (457 mm) to a structure, away from doors, windows and fresh-air intakes and subject to local code; the spec-sheet drawing is approximate, so the pad is laid out from the installation manual. On propane, 1.76 gal/hr at half load is roughly 127 gallons over a 72-hour outage (our arithmetic: 1.76 × 72), and the gas line must be sized for the full-load 243 ft³/hr on natural gas. The propane tank sizing guide and gas line sizing guide cover the next step. (Source: 3.)
Specification sources, checked October 3, 2026:
Natural Gas Consumption
Current published figures:
- 189 ft³/hr at 50% load
- 243 ft³/hr at full load
Rated NG output:
14 kW
Propane Consumption
Current published figures:
- 1.76 gal/hr at 50% load
- 2.92 gal/hr at full load
Rated LP output:
14 kW
Generac 14kW Weight
Current model weight:
391 lb
That is lighter than the current 18kW, 22kW, 26kW and 28kW models.
Generac 14kW Dimensions
Current enclosure:
46.4 × 26.3 × 30.7 inches
So despite the lower power output, the physical footprint is similar to larger current air-cooled Generac units.
Do not choose generator size from enclosure dimensions.
Choose it from electrical load.
Is 14kW Enough for a Whole House?
It can be, especially where major loads are:
- Gas furnace
- Gas water heater
- One moderate AC
- Refrigerator
- Lighting
- General outlets
- Electronics
It gets harder if the house relies heavily on electricity for:
- Heat
- Water heating
- Cooking
- Multiple HVAC systems
- Pool equipment
- Well pumps
- EV charging
Load management can make 14kW work in houses that would otherwise need a larger generator.
14kW vs 10kW
The current 14kW gives 4kW more output on both natural gas and propane.
That extra 4kW is substantial when the generator needs to carry:
- AC compressor
- Well pump
- More simultaneous circuits
The 10kW remains attractive when the brief is simply essential-load backup.
14kW vs 18kW
Current output:
14kW
- 14 LP
- 14 NG
18kW
- 18 LP
- 17 NG
So on natural gas the real gap is:
3 kW
That is often enough to matter for HVAC or another large load.
Current Price
Generator-only MSRP is currently listed from approximately:
$4,889
A current transfer-switch bundle is listed from roughly:
$5,949
Installed price will be higher.
Who Should Buy the 14kW?
Good fit when:
- One moderate HVAC system is part of the plan
- Major heat/water loads are gas
- You are willing to use load management
- 10kW is too restrictive
- 18kW adds capacity you do not need
Who Should Move Up?
Move to 18kW or above when:
- AC starting demand is high
- More than one large motor load must overlap
- Electric heating is important
- You want fewer managed loads
- Load calculation does not fit 14kW
Maintenance
Current next-generation 14kW models use the Power Zone 200 controller and current Generac maintenance schedule.
Do not use an older Evolution-era service interval blindly.
Bottom Line
The current Generac 14kW is a clean middle option:
14kW on both LP and natural gas, 391 lb, current Power Zone platform.
The strongest reason to choose it is not price alone.
It is that 14kW genuinely covers your calculated load without paying for unused capacity.