Firman T08071 Tri-Fuel 8000W is a portable generator from Firman, rated 8,000 running watts with 10,000 starting watts on gasoline, with 120/240V output.
General
Type
portable
Fuel
gasoline, propane, natural-gas
Power output
Running watts (gas / LP for standby)
8000 W
Starting watts (gas)
10000 W
Performance
Runtime at 50% load (gas)
12 h
Fuel tank
8 gal
Electrical
Output voltage
120/240V
Features
Start type
electric
Engine
Engine displacement
439 cc
What the numbers mean
At 8,000 running watts
on its best fuel, this unit covers a partial-home setup through a 30 A transfer switch or interlock: refrigerator, furnace, a well or sump pump, and lights, with load management for anything bigger.
Runs on gasoline, propane, natural gas — expect lower output on propane (roughly
10%) and natural gas (roughly 20%) than on gasoline; the spec table shows the
published per-fuel ratings.
Runtime: 12 h at 50% load on the 8-gallon tank
— roughly 19.2 h at 25% load (estimated)
.
Estimated fuel cost for 24 h at ~50% load: about $51 on gasoline at
national average prices (assumptions).
House hookup: pairs with a 50 A generator inlet (
14-50 / CS6365) and a transfer switch or interlock
installed by an electrician.
What can the Firman T08071 Tri-Fuel 8000W run during an outage?
With 8,000 running watts on its best fuel, the Firman T08071 Tri-Fuel 8000W covers a partial-home setup through a 30 A transfer switch or interlock: refrigerator, furnace, a well or sump pump, and lights, with load management for anything bigger. Add up your actual loads with a sizing worksheet — the bands here are rough guidance, not a load calculation.
How long does the Firman T08071 Tri-Fuel 8000W run on a tank of gas?
About 12 hours at 50% load on its 8-gallon tank, per the manufacturer's rating. At a lighter 25% load, figure roughly 19.2 hours (estimated — fuel burn does not scale linearly with load).
What does the Firman T08071 Tri-Fuel 8000W cost to run for a day?
Roughly $51 for 24 hours of continuous operation at about 50% load on gasoline, at national average fuel prices. The assumptions behind this estimate are documented on the methodology page; your fuel price and load change the figure.
What inlet does the Firman T08071 Tri-Fuel 8000W need to power a house?
A 50 A generator inlet (a 14-50 or CS6365 connection) wired to a transfer switch or interlock kit — an electrician's job that normally requires a permit. Never backfeed through a dryer or wall outlet.
