Which has more running watts?

The DuroMax: 10,500 W on gasoline and 10,000 W on propane, against the Westinghouse's 9,500 W and 8,500 W. Starting figures are 13,000 / 12,500 W against 12,500 / 11,200 W.

Do both shut down on carbon monoxide?

DuroMax lists "CO Sensor Shutdown: Yes". Westinghouse's description calls it "a carbon monoxide (CO) sensor with automatic shutdown". Either way, a generator runs outdoors only; a sensor does not make indoor use safe.

Which runs longer on a tank of gasoline?

At 25 % load, DuroMax publishes 17 hours on its 8.3 gal tank and Westinghouse 12 hours on its 6.6 gal tank. At 50 % load both publish 8 hours. The two 25 % figures are for different wattages, because 25 % of each generator's rating differs.

Can either start a 1/2 hp well pump?

Yes. Its 7,056 W locked-rotor start is well inside both starting ratings, and its 1,000 W running draw is about 10–11 % of either generator's gasoline rating.

Westinghouse WGen9500DFc vs DuroMax XP13000EH

	Westinghouse WGen9500DFc	DuroMax XP13000EH
Maker list price	$1,399 source (2026-10-31)	$1,299 source (2026-10-31)
Fuel	gasoline,propane source	gasoline,propane source
Running W (gasoline)	9,500 W source	10,500 W source
Starting W	12,500 W source	13,000 W source
$ per running W	0.147	0.124
Inverter	No source	No source
CO sensor	Yes source	Yes source
Run time (published)	12 h @ 25 % gasoline 8 h @ 50 % gasoline 7 h @ 50 % propane	17 h @ 25 % gasoline 8 h @ 50 % gasoline 13 h @ 25 % propane 6 h @ 50 % propane
Noise	74 dBA (no distance stated) source	74 dBA (no distance stated) source
Tank	6.6 gal source	8.3 gal source
Weight	212.1 lb source	234 lb source
Warranty	3 yr source	3 yr source

A generator runs outdoors only, at least 20 feet from the house, with the exhaust pointed away, per CPSC's guidance.

Who each is for

Both are non-inverter, dual-fuel generators with 120/240 V L14-30R and 14-50R outlets; Westinghouse describes all of its outlets as transfer-switch ready. The DuroMax XP13000EH has the higher ratings and the bigger tank. The Westinghouse WGen9500DFc is lighter and adds a remote key fob. This is the carbureted WGen9500DFc with a CO sensor. It is not the WGen9500DF, which has no sensor, and not the fuel-injected WGen9500DFc EFI.

Running and starting watts, by appliance

On gasoline, Westinghouse lists 9,500 W running and 12,500 W starting; DuroMax lists 10,500 W and 13,000 W. On propane the figures are 8,500 / 11,200 W against 10,000 / 12,500 W. The DuroMax's propane rating loses less from its gasoline rating than the Westinghouse's does.

1/2 hp well pump (1,000 W running, 7,056 W locked-rotor start): both start it with thousands of watts to spare. Among battery stations, only the DELTA Pro 3 on this site manages it, with a 944 W margin.
Well pump, fridge, furnace blower and 1/2 hp sump pump together: about 2,337 W running and 8,393 W peak when the well pump starts. Both generators handle it, at about 25 % of the Westinghouse's gasoline rating and 22 % of the DuroMax's.
Adding a 1,500 W space heater to the well pump and fridge: 2,860 W running, about 30 % and 27 % of the gasoline ratings.

Fuel and run time

Only the makers' published points are used here, with no interpolation. On gasoline, Westinghouse gives 12 h at 25 % load and 8 h at 50 % on a 6.6 gal tank. DuroMax gives 17 h and 8 h on an 8.3 gal tank. On propane, Westinghouse publishes only 7 h at 50 % load, on a 20 lb tank. DuroMax publishes 13 h at 25 % and 6 h at 50 % without a tank size, though it suggests a 40 lb tank at minimum. Because each percentage refers to a different rating, equal percentages are not equal watts.

CO sensor and other features

Both list a CO sensor. DuroMax's spec row reads "CO Sensor Shutdown: Yes". Westinghouse's table says "Carbon Monoxide (CO) Sensor: Yes", and its description says "with automatic shutdown". Both list electric start; only the Westinghouse lists remote start. Outlets: Westinghouse has two 5-20R duplexes, an L14-30R and a 14-50R. DuroMax has two GFCI 5-20R outlets, an L5-30R, an L14-30R, a 14-50R and a 12 V outlet. Neither is listed as CARB compliant; Westinghouse's tags contradict its own spec table on that point. Both print 74 for noise, but neither states a distance, and DuroMax does not state A-weighting, so the two numbers are not comparable.

Weight and warranty

Westinghouse lists 212.1 lb dry. DuroMax lists 234 lb dry and 248 lb as "Product Weight". Westinghouse gives a 3-year limited residential warranty (1 year commercial); DuroMax gives 3 years of parts and technical service.

Price per running watt

On 2026-10-31, Westinghouse showed a $1,399 MSRP, $0.147 per gasoline running watt. Its store reported the model unavailable for online purchase, and the page is not listed in Westinghouse's own catalog. DuroMax showed a $1,299 sale price ($0.124 per running watt) against a $1,699 regular price ($0.162). Westinghouse's carbureted and EFI pages also show the same UPC, so confirm exactly which version a seller ships.

Verdict from the data

The DuroMax gives more watts on both fuels, a longer published gasoline run at 25 % load, for less per running watt at its sale price. The Westinghouse is about 22 lb lighter dry and adds remote start, but its current availability and version identity need checking before purchase.