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HARVIA materials > SELF-SERVICE SAUNA > SPRUCE board
(directly from the Finnish forests sauna wood with great cares)
Harvia use only wood of Finnish origin (forests of Northern Europe), first choice and naturally seasoned for four years in yard with seasonal shifts (spring, summer, autumn and winter) of the boards.
This curing process ensures maximum stability of the essence, the total absence of resinous residue and maximum longevity.