Champion 22kW fleX
#2 in 15 to 22 kWFull review
For coastal or wet climates that want Champion’s 22 kW and long warranty in a rust-proof aluminum housing.
Amazon $6,399$6,399
3.4/5
For typical homes with central air that want the best known brand and a whole-house switch in the box.
- 22 kWPropane
- 21 kWNatural gas
- Included, 200 ATransfer switch
- 5 yearsWarranty
Check price at Amazon$6,506.10
Price checked November 1, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs most homes with central air through the included 200 A switch
- Same compact cabinet as the smaller sizes, so it fits tight side yards
- Cellular monitoring included, no home Wi-Fi needed
Cons
- 5-year warranty is shorter than Briggs & Stratton and Champion offer
- Load management modules cost extra
The Generac Air-Cooled Standby (2025) family
Every Generac Air-Cooled Standby (2025) model we rank, smallest first. Ratings compare each against its own size.
| Model | Propane | Rating | Price |
|---|---|---|---|
| Generac 10kW Standby 7321 | 10 kW | 3.5/5 | $3,896.10 |
| Generac 14kW Standby 7323 | 14 kW | 3.4/5 | $5,255.10 |
| Generac 18kW Standby 7324 | 18 kW | 3.2/5 | $5,975.10 |
| Generac 22kW Standby 7325 (this one) | 22 kW | 3.4/5 | $6,506.10 |
| Generac 24kW Standby 7326 | 24 kW | 3.2/5 | $6,875.10 |
| Generac 26kW Standby 7328 | 26 kW | 3.2/5 | $7,253.10 |
| Generac 28kW Standby 7329 | 28 kW | 3.1/5 | $8,387.10 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 7325 (G007325-0) |
|---|---|
| Output | |
| Rated output, propane | 22 kW |
| Rated output, natural gas | 21 kW |
| THD | Under 5% |
| Engine | 997 cc |
| Engine speed | 3,600 rpm |
| Install | |
| Transfer switch | Included, 200 A |
| Load management | No |
| Remote monitoring | Yes |
| Enclosure | Aluminum |
| Dimensions | 46.4 x 26.3 x 30.7 in |
| Weight | 451 lb |
| Noise and warranty | |
| Noise, normal operation | 67 dBA |
| Noise, weekly self-test | 55 dBA |
| Warranty | 5 years |
| Released | 2025 |
Alternatives in this size
Briggs & Stratton PowerProtect+ 22kW
#3 in 15 to 22 kWFull review
For homes with central air on natural gas that want full output, built-in monitoring and seven years of full cover.
Norwall $7,289 Signature Solar $7,289$7,289
Generac 18kW Standby 7324
#5 in 15 to 22 kWFull review
For average homes with one central air conditioner that want a whole-house switch included.
Amazon $5,975.10$5,975.10
Compare
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