Fahrenheit Endurance 50F Multi Fuel Furnace

The Fahrenheit Endurance 50F is marketed as a multi-fuel furnace, but because it compares with pellet stoves in many ways, and can be used as a free standing multi fuel stove, I've used the stove criteria below to evaluate it.

Producing 50,000 btu.'s and able to heat 2,500 square feet, This stove can either be connected to ducting or used as a freestanding stove with the optional warm air diffuser top.

Features to note are the ability to change settings for different fuels using the control panel. If needed, the combustion air damper is also adjustable.

The Fahrenheit Endurance 50F Will burn on low for an hour if it detects that no heat is needed, then it will shut down and re-light when heat is called for again.

Combustion air is pre-heated before being sent to the burn pot.

The burn pot cleans itself automatically by swinging in an upper burn plate. Fresh fuel now lands on this plate and is ignited by the lower burn plate. When the new fuel is lit, ash from the lower burn plate is dropped, the upper burn plate retracts and the fire is dropped to the original burn plate.

If you are unsure of the meanings of the terms in the pellet stove review below,or their implications, please go to the Pellet Stove Reviews page for an explanation.

Fahrenheit Endurance 50F Multi Fuel Furnace

Heating Area 2,500 sq.ft.

Max. Heat Output 50,000 btu.

Min. Heat Output Zero, will re-light automatically when heat is required.

Automatic Ignition Yes, with automatic shut-down and re-ignition.

Manual Ignition If needed.

Hopper Capacity 112 lbs, 250 lbs with the optional hopper extension.

Flow Upflow

Warm Air Outlet Size 10 in. round for ducting, or an optional diffuser that allows use as a freestanding stove.

Fahrenheit Endurance with diffuser

Breach (vent position) Top

Burn time 62 hrs. on low heat setting. 139 hours with the optional hopper extension.

Fuel Type High ash pellets (paper and grass), wheat, corn, cherry pits and all grades of wood pellets.

Glass Air Wash Yes

Built in Blower Yes

Convection Blower Capacity Two Speed 600-800 cfm.

Thermostat Compatible Yes

E.P.A. Approved Yes: see 'comments' below.

Efficiency and Emissions No available data - see 'comments' below.

Height 40 in.
Width 20 in.
Depth 36 in.

Weight 380 lbs.

Window Size 8.6 in. by 8.6 in.

Flue Vent Size 4 in. Needs a 3 - 4 inch adapter from the furnace to the flue

Rear Vent Height 19.6 in.

Battery Backup No, See Stove Sentry

Surge Protector Recommended

Colours Charcoal grey

Exhaust Temperature Sensor Yes

Low Draft Shutdown Yes

Construction Type Fabricated steel, stainless steel burn pot.

Automatic Shutdown and Re-ignition If no heat is called for, the Endurance will burn for an hour on low then shut down. When heat is called for, it will re-ignite automatically.

Original purchaser only.
Five years on body parts
Two years for mechanical and electrical parts.

Cold air return from ducting
Hopper Extension ( increases capacity from 112 lbs. to 250 lbs )
Warm air diffuser which enables use as a freestanding stove without ducting.


Efficiency and emissions: to be accepted by the EPA, a wood pellet furnace must have an air to fuel combustion ratio of more than 35:1 by weight, and be more that 78% efficient.

Because the Fahrenheit Endurance 50F is designed as a multi-fuel furnace, and can cope with varying degrees of impurities in the fuel, an efficiency rating which only applies to premium grade wood pellets would not be meaningful.

Fahrenheit technologies claim a combustion efficiency of 99%.


Cleaning frequency depends on the amount and type of fuel being burnt. These recommendations are for moderate use. More frequent for higher use. Clean glass as necessary.

Every 4-5 days
Empty ash and clean the air box trap door. Clean the heat exchange tubes.
Clean the burn pot, exhaust clean-out port, heat exchange baffle and air filter.
Check exhaust system for creosote and ash build up. Yearly
Inspect gaskets around stove openings, clean exhaust flue, grease ash removal actuators, clean the exhaust fan.


If you would like to leave a review of the Fahrenheit Endurance 50F, please use the form on the contact page



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