Firman T09275 review
Firman T09275 9,200-Watt Tri-Fuel Portable Generator with CO Alert
By Tom Calder
At 9,200 running watts on gasoline (8,300 propane, 6,900 natural gas) it has room for a refrigerator, freezer, furnace blower, well or sump pump and a window air conditioner or two. The L14-30R and 14-50R outlets suit a transfer switch or interlock, and the maker lists CO Alert shutdown.
- Best for
- Large-home backup that can run off a natural gas line
- Skip it if
- You live in California, where the maker will not ship it
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Gas, propane or natural gas
- CO Alert shutdown
- L14-30R and 14-50R outlets
Worth knowing
- 217.5 lb per maker page
- Only one 5-20R duplex outlet
- Natural gas output falls to 6,900 W
ⓘ As an Amazon Associate, PreparedStates earns from qualifying purchases. We may earn a commission when you buy through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and can change at any time.
Who shouldn't buy this
Don't buy it if you live in California, where the maker will not ship it.
Key specs
| Running watts | 9,200 W |
| Starting watts | 11,400 W |
| Fuel | Gasoline, propane or natural gas |
| Weight | 217.5 lb |
| CO safety (maker's term) | CO Alert |
| Noise (as listed) | — |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Big home backup with remote start
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for The benchmark quiet inverter generator
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Runs on propane too