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The approval of the new European standard for pellets (EN 14961-2) has introduced new certificates: ENplus for pellets
used in devices for domestic heating; EN-B for industrial boilers. The standard defines the ENplus wood pellet classes in
A1 and A2. The A1 class introduces more severe limits on the possible ash residue. The A2 class allows for a ash residue
content up to 1.5%.
Description
Unit of
measurement
ENplus-A1 ENplus-A2
Diameter mm 6 (± 1) 6 (± 1)
Length mm 3.15 ≤ L ≤ 40
1)
3.15 ≤ L ≤ 40
1)
Density kg/m³ ≥ 600 ≥ 600
Calorific value MJ/kg ≥ 16.5 ≥ 16.5
Humidity % ≤ 10 ≤ 10
Dust % ≤ 1
3)
≤ 1
3)
Mechanical resistance % ≥ 97.5
4)
≥ 97.5
4)
Ash residue %
2)
≤ 0.7 ≤ 1.5
Ash melting temperature °C ≥ 1200 ≥ 1100
Chlorine %
2)
≤ 0.02 ≤ 0.03
Sulphur %
2)
≤ 0.05 ≤ 0.05
Nitrogen %
2)
≤ 0.3 ≤ 0.5
Copper mg/kg
2)
≤ 10 ≤ 10
Chromium mg/kg
2)
≤ 10 ≤ 10
Arsenic mg/kg
2)
≤ 1 ≤ 1
Cadmium mg/kg
2)
≤ 0.5 ≤ 0.5
Mercury mg/kg
2)
≤ 0.1 ≤ 0.1
Lead mg/kg
2)
≤ 10 ≤ 10
Nickel mg/kg
2)
≤ 10 ≤ 10
Zinc mg/kg
2)
≤ 100 ≤ 100
1) no more than 1% of the pellet may be longer than 40 mm. Maximum length allowed: 45mm
2) Determined on the dry measurement
3) < 3.15 mm particles (fine dust particles before fuel dispensing)
4) for measurements carried out with a Lignotester, the limit value of the base weight in% is
≥ 97.7
ENplus European standard for
Table 3
wood pellets