Air permeability of thermally modified hemlock woodLiu, Yaohui (Avtor) Avramidis, Stavros (Avtor) woodthermal modificationwestern hemlocklongitudinal air permeabilityspecific permeabilityWestern hemlock (Tsuga heterophylla) is a prevalent coastal species in British Columbia (BC). Its wood has a high potential for thermal modification, a process that can affect numerous physical properties, including air permeability. The current study investigates the longitudinal air permeability of hemlock wood modified at three temperature levels, 170 °C, 212 °C, and 230 °C, and a two-hour treatment length. Permeability values obtained using Darcy’s law and the water-falling volume displacement method were positively correlated with treatment temperature up to 212 °C, after which the permeability decreased slightly. ANOVA followed by the Duncan test revealed that thermal treatment at 212 °C and 230 °C significantly increased air permeability, whereas it was insignificant at 170 °C.20222025-04-10 12:48:58Članek v reviji168369UDK: 630*812.23ISSN pri članku: 0024-1067DOI: 10.26614/les-wood.2022.v71n02a01COBISS_ID: 137779459sl