Firewood: volume & heat

stacked → solid m³, calorific value by species, seasonal need and price per kWh of heat

Parameters

Wood species

Stacked m³ bought

Price per stacked m³, UAH

House area, m²

Stove/boiler efficiency, %

Heat demand

Result

Needed for the season

7,50 stacked m³

≈ 10 458,00 UAH

Solid wood in purchase6,80 m³

Useful heat from purchase10 710,00 kWh

Covers seasonal need134,00%

Price per kWh of heat1,31 UAH

A stacked m³ ≠ solid m³: stacked logs contain 30–40% air. Wet wood yields 30–50% less heat and tars the chimney — dry it 1–2 years. Poplar is cheaper than oak but you need almost twice the volume. A gasification boiler (85–90% eff.) extracts notably more heat than a basic stove (55–65%).

Über Brennholz: Menge & Wärme

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