Pellet Fuels Institute Standards

TABLE 1 PFI FUEL Grade Requirements 

Residential/Commercial Density Fuel Standards      
Fuel Property PFI Super Premium PFI Premium PFI Standard PFI Utility
         
Bulk Density, lbs/cubic foot 40.0 - 46.0 40.0 - 46.0 38.0 - 46.0 38.0 - 46.0
Diameter, inches 0.250 - 0.285 0.250 - 0.285 0.250 - 0.285 0.250 - 0.285
Diameter, mm 6.35 - 7.25 6.35 - 7.25 6.35 - 7.25 6.35 - 7.25
Pellet Durability Index >97.5 >97.5 >95.0 >95.0
Fines, % (at the mill gate) <0.50 <0.50 <0.50 <0.50
Inorganic Ash, % <0.50 <1.0 <2.0 <6.0
Length, % greater than 1.50 inches <1.0 <1.0 <1.0 <1.0
Moisture, % <6.0 <8.0 <8.0 <10.0
Chloride, ppm <300 <300 <300 <300
Heating Value As-Rec +/- 2SD As-Rec +/- 2SD As-Rec +/- 2SD As-Rec +/- 2SD

Source:http://www.pelletheat.org/2/StandardSpecificationWithCopyright%20.pdf

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