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Westinghouse WGen11500TFc Review: Worth It If You Have a Gas Line
By Justin · Updated September 25, 2026
The WGen11500TFc is the WGen11500DFc with one more trick: it also runs on natural gas. It has the same 550cc engine, 5%-or-less THD, 9.5-gallon tank, and CO sensor. It also has the same 230 pounds.
So the real question isn't whether it's a good generator. It is. The question is whether natural gas is worth the extra money for you. If you have natural gas at the house and you're willing to have a connection installed, the answer is probably yes. Here's why, and when it isn't.
Buy it if your house has natural gas service and you want a portable generator that can run for days without anyone hauling gas cans or swapping propane tanks.
Skip it if you don't have natural gas, or you won't pay a plumber to add a connection. The WGen11500DFc is the same machine for less money.
WGen11500TFc Specs at a Glance
| Spec | WGen11500TFc |
|---|---|
| Running / peak watts (gasoline) | 11,500 / 14,500 |
| Running / peak watts (propane) | 10,500 / 13,500 |
| Running / peak watts (natural gas) | 9,500 / 12,000 |
| Engine | 550cc OHV 4-stroke, cast iron sleeve |
| Fuel tank | 9.5 gallons |
| Rated runtime | Gas: 19 hrs at 25% / 9.5 hrs at 50%. Propane (20 lb): about 7 hrs at 50%. Natural gas: as long as the gas supply lasts |
| THD | ≤ 5% |
| Outlets | 1× 14-50R (50A), 1× L14-30R (30A twist-lock), 2× 5-20R 120V GFCI duplex, 2× USB |
| Starting | Remote key fob, push button, recoil pull backup |
| CO sensor | Yes, with automatic shutdown |
| Weight | About 230 lbs |
| Noise (rated) | 74 dBA |
| Neutral | Bonded |
| CARB compliant | No |
| Warranty | 3 years residential |
| Cover included | No |
Specs from Westinghouse's product page. Runtime figures are the manufacturer's.
What I Like
Natural gas means you don't have to refuel
This is the whole reason to buy the TFc. Hook it up to your natural gas line and it runs until the outage ends, with no gas station runs and no propane tanks to swap. Owners with gas plumbed to the house say this is what they like most, and it makes sense. After a big storm, fuel is often the hardest thing to get.
It works a lot like a standby generator, for a fraction of the cost. The difference is that you still roll it out, plug it in, and start it yourself.
Clean power from a regular generator
Like the DFc, it's rated at 5% THD or less. That's inverter territory, and it means computers, TVs, modems, and the control boards on newer furnaces and appliances can run straight off it. Most conventional generators this size are rated four or five times higher.
Plenty of power for central air
Owners call it "a beast," and some report running a 4-ton central AC along with other appliances. On gasoline, with 11,500 running watts, that's believable, especially with a soft-start kit on the AC. On natural gas, you're working with 9,500 running watts, so you'll have less room. More on that below.
Easy to get running
It arrives mostly assembled, and owners say they had it running within minutes. It starts quickly with the fob, including on propane. You have three ways to start it: the fob, the push button, or the pull cord if the battery dies. Some owners note it takes several minutes after a cold start to settle into a steady idle. Let it warm up before you load it.
Built well, with a CO sensor
The engine has a cast iron sleeve, which is what you want in an engine you're counting on for years. Owners are consistently happy with how solid it is. The CO sensor comes standard and shuts the engine off if carbon monoxide builds up around it.
What I Don't Like
You give up power on natural gas
On natural gas, output drops to 9,500 running watts, which is 2,000 less than on gasoline. That's normal for natural gas engines, but it matters. The central AC plus essentials setup that fits easily on gasoline gets tight on natural gas. If you plan to run AC on natural gas, add up your loads carefully and get a soft-start kit.
Natural gas needs a proper hookup
You can't just screw a hose onto your gas meter. You'll need a licensed plumber to install a connection outlet that can supply enough gas for the engine, plus the right hose. Budget for that on top of the generator. Factor in the installation cost when you compare the TFc with the DFc.
It's heavy, and it's not quiet
230 pounds rolls fine on a smooth driveway and fights you on grass and gravel. It's rated at 74 dBA. Some owners think it's quieter than expected, and others think it's loud. Everyone agrees on one thing: run it at least 20 feet from the house, with the exhaust pointed away from doors and windows.
No cover in the box
At this price, you'd expect a cover to be included. It isn't. Buy one, especially if it'll be stored outdoors or run in the rain, since moisture is hard on any open-frame generator.
It won't run everything
Even at 11,500 watts, it can't run every circuit in a 200-amp house at the same time. That's true of every portable generator. You'll still pick which circuits get power and take turns with the big loads.
What Can It Run on Each Fuel?
| Setup | Running watts (approx.) | Gasoline (11,500) | Natural gas (9,500) |
|---|---|---|---|
| Fridge, freezer, sump pump, furnace blower, lights/internet | 3,550 | Easy | Easy |
| + well pump (1 HP) | 5,550 | Easy | Fine |
| + 3-ton central AC (with soft start) | about 9,300 | Fits | Very tight |
| + electric water heater at the same time | about 13,800 | Over | Over |
Typical appliance numbers: fridge 700 W, freezer 500 W, sump pump 1,050 W, furnace blower 800 W, lights and electronics 500 W, well pump 2,000 W, 3-ton AC about 3,750 W, water heater 4,500 W. Check your own labels.
If you plan to run central air on natural gas, drop something else from the list (the well pump can cycle on its own time) or switch to gasoline on the hottest days. That's the nice part about tri-fuel: you can pick the fuel for the situation.
How Much Fuel Will You Need?
- Natural gas: none to store. It runs off your gas service.
- Gasoline: about 12 gallons a day at light load, and about 24 gallons a day at half load (from the rated 19 and 9.5 hours per 9.5-gallon tank).
- Propane: a 20 lb tank lasts about 7 hours at half load, so plan on 3 to 4 tanks a day.
Hooking It Up to Your House
You'll need two installs, both done by licensed pros: an electrician for a transfer switch or interlock with a 50A inlet, and a plumber for the natural gas connection. Tell the electrician it has a bonded neutral so the transfer switch is set up correctly. Never backfeed through a dryer outlet.
Want it automatic? This generator works with Westinghouse's WATS200 automatic transfer switch, which starts it on its own when the power goes out, even if you're not home.
WGen11500TFc vs WGen11500DFc vs WGen9500DF
| WGen11500TFc | WGen11500DFc | WGen9500DF | |
|---|---|---|---|
| Fuels | Gas / propane / natural gas | Gas / propane | Gas / propane |
| Running watts (gas) | 11,500 | 11,500 | 9,500 |
| THD | ≤ 5% | ≤ 5% | ≤ 23% |
| Tank | 9.5 gal | 9.5 gal | 6.6 gal |
| CO sensor | Yes | Yes | No |
| Westinghouse list price | $1,699 | $1,449 | $1,249 |
At Westinghouse's list prices, natural gas costs you about $250 extra, plus the plumber. If you have a gas line and live somewhere with long outages, that's money well spent. If not, the DFc is the smarter buy.
Questions People Ask
What's the difference between the WGen11500TFc and WGen11500DFc?
The TFc adds natural gas. Otherwise they're the same generator: same engine, tank, outlets, THD, and CO sensor.
Can it run a 4-ton AC?
Owners report doing it on gasoline, and the numbers support it, especially with a soft-start kit on the AC. On natural gas (9,500 running watts), it's much tighter. Ask your HVAC tech for your unit's running and starting watts.
How do I connect it to natural gas?
Have a licensed plumber install a natural gas connection outlet sized for the generator, and use a proper generator natural gas hose. Don't DIY this one.
Does it come with a cover?
No. You'll need to buy one separately.
Is it safe for electronics?
Yes. It's rated at 5% THD or less, the range generally considered safe for computers and TVs.
How I Put This Review Together
I haven't run this unit myself. This review is based on Westinghouse's published specs, what owners report after running it through real outages, and the watt and fuel math. If I get one in to test, I'll add my own numbers here.
Bottom Line
The WGen11500TFc is a WGen11500DFc that can also run on natural gas. If you have a gas line and don't want to deal with fuel during a long outage, it's the best version of an already great generator. Just remember you get 2,000 fewer watts on natural gas, and budget for a plumber. If you don't have natural gas, save the money and get the DFc.