The honest headline on Generac’s biggest common residential tier: on natural gas it’s a 22.5kW machine — the 26 belongs to propane, by Generac’s own published split. And the most quietly useful verified fact on this page: the 7290 occupies exactly the same 48 × 25 × 29 inch footprint as its smaller sibling. The step-up buys output and margin, not a bigger corner of your yard. What it should never buy is a skipped load calculation — margin you measured is insurance; margin you guessed at is just spend.
What does Generac publish for the 7290?
| Spec | Published figure |
|---|---|
| Output, natural gas | 22.5kW |
| Output, propane | 26kW |
| Engine | G-Force 1000 |
| Footprint | 48 × 25 × 29 in |
| Weight | 518 lb |
| Warranty | 5-year limited |
| Fuel use, full load | 333 ft³/hr NG · 3.63 gal/hr LP |
One honest footnote on the consumption row: Generac’s half-load natural-gas figure for the 7290 (188 ft³/hr) reads lower than the smaller 22kW’s (221), which is a quirk of how the two engines are load-mapped rather than a typo you should size around. Use the full-load figure — 333 ft³/hr — for the meter conversation; it’s clearly the larger draw, as you’d expect.
Which home profile does the step-up actually serve?
The homes whose worst hour is genuinely heavy: two HVAC systems that might start in the same minute, all-electric appliance stacks, a well pump or shop load riding the panel, or medical equipment that should never wait on a shed cycle. For those houses the 26kW’s margin is the product, and how Generac and Kohler differ on paper at this tier — including Kohler’s 26kW, its direct competitor — is the right next comparison.
For the single-system, gas-appliance majority, the honest math usually lands a tier down, where load management covers the same circuit list for less machine and less fuel demand. Bigger isn’t preparedness; measured is.
What does the same-footprint fact change in practice?
More than it seems. Placement and clearance work done for one tier holds for the other, so a house that starts the paperwork undecided between the two doesn’t redo the siting when the sizing lands. The pad conversation barely changes. What does change with the step-up sits on the fuel side — more demand on the same meter, a faster draw on the same tank — and on the spec-table comparison you can watch that pattern hold across every tier: the machine’s footprint stays polite while its appetite doesn’t.