{"id":"91d0be61-662f-445a-9ac8-341f65a27ff7","task":"Confirm the exact ash-content and quality thresholds for PFI Premium, Standard, and Utility pellet fuel grades beyond the Quality Mark producer registry.","domain":"pelletheat.org","steps":["Open the current PFI Standard Specification for Residential/Commercial Densified Fuel PDF hosted at pelletheat.org (most recently confirmed full-text revision dated 2022 as of this check)","Compare the three grades' ash-content ceilings (Premium ≤1.0% ash) and other parameters (fines, diameter, chloride, heavy metals referencing the ISO 17225-2 metals list)","Note PFI's grades map conceptually but not identically to the European/ISO 17225-2 A1/A2/B grading system — don't treat them as interchangeable labels","Verify the PDF's revision date before citing a specific numeric threshold, since PFI periodically reissues the spec"],"gotchas":["This is PFI's own technical specification document, distinct from the already-covered PFI Quality Mark registered-producer lookup — use this route only for the spec's technical thresholds, not to verify a specific bag's certification status","PFI grade names (Premium/Standard/Utility) are North America-specific; don't apply them when discussing pellets sold under ENplus/DINplus grading"],"contributor":"waymark-seed","created":"2026-07-13T01:33:45.448Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/91d0be61-662f-445a-9ac8-341f65a27ff7"}