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Published August 2, 2026. Updated September 1, 2026.
Buy the Westinghouse iGen2200c portable generator, not the iGen2200. Westinghouse lists both at $579.00 MSRP, and the difference is that the iGen2200c page reads “Featuring Automatic Low Oil and Carbon Monoxide (CO) Shutdown” while the iGen2200 spec table reads “Carbon Monoxide (CO) Sensor: No”. The Ledger below scores the iGen2200c 92 out of 100, Champion’s 3400W dual fuel inverter 70, and the iGen2200 62.
I’ve spent years around portable generators on camping trips and after storms. The lesson never changes: where you put the machine matters more than how big it is.
The stakes are not theoretical. The U.S. Consumer Product Safety Commission puts it at “an average of nearly 100 consumers die in the U.S. each year from CO poisoning from portable generators.” A shutdown sensor does not change where the machine goes. CPSC guidance is that a generator is “operated outside only, at least 20 feet away from the house,” with the exhaust directed away from the home and other buildings. Follow the manual that came with your machine, and if you are wiring anything into the house, that is an electrician’s job.
Prices are approximate, current as of publication, and change frequently — confirm the latest price with the retailer before buying.
Which portable generator has a CO shutoff?
Westinghouse publishes a specification table for the iGen2200 on its own site. One row of that table reads “Carbon Monoxide (CO) Sensor: No”. Three rows of the catalogue away sits the iGen2200c, same 2,200 peak watts, same 1,800 running watts, same 52 dBA, same 3-Year Limited residential warranty, and the same $579.00, carrying the line “Featuring Automatic Low Oil and Carbon Monoxide (CO) Shutdown”. The whole difference is 1.1 lb of dry weight and a sensor.
Every number below was read on each maker’s own product page on 31 August 2026. Where a maker publishes nothing, the cell says so rather than borrowing a figure from a retailer. Champion’s dual-fuel inverter, model 100396, publishes 3,400W starting and 3,100W running on gasoline, and 3,060W starting and 2,790W running on propane, each at 25% load; a noise figure of 59 dB(A) measured at 23 feet; and a weight of 95.9 lb, with no dry or wet basis stated. Champion publishes no price on its own product page.
‘Page Not Found’ Is What Generac Returns for the GP3500iO
Generac’s product page for the GP3500iO, model 7128, returns a Page not found error. Its current portable-generator listing carries 24 models, and the GP3500iO is not among them. Thirteen of those 24 carry the word COsense in the product name, including the nearest thing to a replacement, the Portable Inverter Generator 3500i with COsense, model 7723.
Retailer listings for the GP3500iO still exist, which is exactly why a listing is not the test. This site checks a pick against the maker’s own store, and Generac’s own store has no page for it, so it does not appear in this comparison.
One more Generac item belongs here even though it does not touch these machines. CPSC recall 26-407, dated 16 April 2026, covers about 149,400 Generac units in the United States plus 260 in Canada, from the GP3600 through the GP9500ETF, because “fuel can leak from the carburetor” on the first fill. There are 114 reported fuel leaks and no reported injuries, and the remedy is a free repair. No inverter model in this comparison appears on it. Searches of CPSC recalls on 31 August 2026 returned nothing covering the Champion 100396, the iGen2200 or the iGen2200c either; the 2020 Westinghouse oil-leak recall, 20-185, names the WGen5300DFv and the iGen4500DF and neither of these.
How do these portable generators score on five weighted axes?
Five axes and the reason each one carries the weight it does. Read the first axis carefully: it scores what a maker publishes about a shutdown, not how well any shutdown performs. A sensor is not a reason to move a generator closer to the house.
How do the CO and availability axes score?
| Axis and why it carries this weight | Points | Westinghouse iGen2200c | Champion 100396 | Westinghouse iGen2200 |
|---|---|---|---|---|
| CO shutdown published by the maker. Heaviest by a distance, because CPSC puts the annual toll at nearly 100 deaths and because on this shelf the version with a shutdown costs the same as the version without. | 30 | 30 (automatic CO shutdown published) | 0 (page lists a low oil shut-off and no CO shutoff) | 0 (spec table reads Sensor: No) |
| The maker still sells it. Weighted second because a discontinued pick sends a reader to a reseller with no warranty path. | 25 | 20 (live page, retailer listing shown out of stock) | 25 (live page, no stock caveat) | 20 (live page, retailer listing shown out of stock) |
How do the output, warranty, noise and weight axes score?
| Axis and why it carries this weight | Points | Westinghouse iGen2200c | Champion 100396 | Westinghouse iGen2200 |
|---|---|---|---|---|
| Output figures verifiable on the maker’s own page. Weighted because a shopper needs the running figure, not the starting one, to size a generator against an appliance load. | 20 | 20 (2,200 peak, 1,800 running) | 20 (both fuels, starting and running, published separately) | 20 (2,200 peak, 1,800 running) |
| Warranty published on the page. Weighted below output because all three publish one and the terms are close. | 15 | 15 (3-Year Limited residential, 1 Year commercial) | 15 (3-year limited) | 15 (3-Year Limited residential, 1 Year commercial) |
| Noise and weight published with the basis stated. Lightest because a decibel figure with no distance behind it is close to decoration. | 10 | 7 (52 dBA, no distance; 47.4 lb) | 10 (59 dB(A) at 23 feet; 95.9 lb) | 7 (52 dBA, no distance; 46.3 lb) |
| Tally | 100 | 92 | 70 | 62 |
How does the portable generator ranking change without the CO axis?
Pull the CO axis out and the remaining 70 points read Champion 70, iGen2200c 62, iGen2200 62. Champion wins that version and the two Westinghouse units tie, which is the honest shape of it: strip the sensor question away and this is a wattage decision. Put the sensor question back and the two Westinghouse machines stop being the same product.
The named loser is the Westinghouse iGen2200, at 62. It loses to its own twin, on one line of its own spec table, at an identical MSRP. That is a strange way to lose.
Which portable generator should you buy?
Westinghouse iGen2200c: the one with the CO shutdown
$579.00 MSRP, 2,200 peak and 1,800 running watts, 52 dBA, 47.4 lb dry, up to 12 hours at 25% load, 3-Year Limited residential warranty. It is the same machine as the iGen2200 with a sensor and 1.1 lb added. Westinghouse’s page pointed to an out-of-stock Amazon listing on the day I read it, with Amazon Canada and Lowe’s Canada offered instead.
Skip this if you need to run a full-size refrigerator alongside a sump pump. At 1,800 running watts it does not have the headroom, and no sensor fixes a wattage shortfall.
’59 dB(A)’ From ’23 Feet’ Is the Only Noise Figure Here With a Basis
Champion’s 3400W Electric Start Dual Fuel Inverter, model 100396, is the wattage answer: 3400W starting and 3100W running on gasoline, 3060W starting and 2790W running on propane, 7.5 hours on gasoline and 14.5 on propane at 25% load, 95.9 lb, 3-year limited warranty. Champion is also the only one of these makers that says how far away it measured its own noise figure, which is why it takes the full 10 on that axis while the Westinghouse units take 7.
Skip this if a published CO shutdown is what you came for. Champion sells CO Shield on other models in its range; this product page lists a low oil shut-off sensor and nothing about carbon monoxide, so buying this one is choosing the wattage over the sensor.
‘Carbon Monoxide (CO) Sensor: No’ Is Why the iGen2200 Finishes Last
Everything good about the iGen2200 is also true of the iGen2200c, at the same $579.00: 52 dBA, 1,800 running watts, 12 hours at 25% load, 46.3 lb, the same warranty. There is no configuration of this comparison where the plain iGen2200 is the one to order over the iGen2200c at the same price.
Skip this if the iGen2200c is available to you at the same price, which on Westinghouse’s own listings it is. Buy this one only if the c model is genuinely unobtainable and you have read the placement guidance above.
How far from the house should a portable generator run?
A carbon monoxide shutdown is a backstop, not a permission slip. CPSC’s guidance is unchanged by which unit you buy: run it outside only, at least 20 feet from the house, direct the exhaust away from your home and other buildings, and close windows and seal vent openings near the generator or in the path of its exhaust. The agency also names two voluntary industry standards for these machines, UL 2201, the Standard for Portable Engine-Generator Assemblies, and PGMA G300, Safety and Performance of Portable Generators.
Neither of those is a law and neither is a promise about any particular unit. Read your own manual for placement and for what the shutdown on your machine is designed to do, and get an electrician for anything that connects to house wiring.
So: the iGen2200c at 92, Champion’s 100396 at 70 if you need the watts more than the sensor, and the plain iGen2200 at 62 for no good reason I can find. If you would rather skip fuel altogether, we have priced Jackery, EcoFlow and Anker battery power stations on charge speed and expandability, and the same question about detectors rather than generators is in our smart smoke and CO detector comparison. More of these sit in Smart Home.
