Hemlock as Firewood: Heat Output and Creosote

Firewood Quality

• Heat: Low—15.9 million BTU/cord (oak: ~30 million). Similar to pine.
• Sparks: Throws many—use a screen.
• Aroma: Pleasant.
• Rating: Fair.

Creosote Concerns

Conifers generally produce more creosote than hardwoods, but the main factor is moisture. Well-seasoned hemlock (split, stacked, covered, 6–12 months) burns cleanly. Green wood of any species creates creosote.

Recommendation

Use hemlock for kindling or shoulder-season fires. Mix with oak/maple for primary heat. Ensure it's fully seasoned (moisture <20%).