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Wood Comparison

TheraSauna® is made with non-toxic and non-allergenic Aspen Hardwood

Infrared energy heats objects (like your body and the inside wood of the sauna) directly and penetrates up to 2 inches below the surface. Cedar and redwood contain a natural insecticide within the wood called turpines. When these naturally occurring oils within the wood are heated, they gas off a substance called cedrine. Cedrine attacks the central nervous system of insects and kills them. It can also cause vomiting and convulsions in humans. TheraSauna® is made of Aspen, which is a clear wood grown at elevations where the trees do not produce an insecticide. Aspen is 99% non-toxic and non-allergenic.

Health Effects Reported with Various Types of Woods

Wood Type Found Use Health Effects
Alder
(common, black, red)
Europe, North America (red)
Western Asia
Toys, general turnery, broom and brush backs Dermatitis associated with black alder, no reports with red
alder, decrease in lung function (red alder)
Aspen North America Furniture, strandboard, pulp and paper No health effects reported
Beech Europe Furniture, bobbins, brush backs, handles, domestic woodware, flooring, plywood manufacture, instruments Dermatitis (wood cutters’ disease) due to lichens growing on the bark of beech trees, rhinitis, asthma, nasal cancer
Birch (paper, white) US and Canada (paper birch)
Europe (white birch)
Furniture, decorative objects, pulp and paper Irritant dermatitis
Cedar, Western Red West Coast of North America Building construction material, boats, planking, framing Asthma, allergic contact dermatitis, sensitizer, decrease in lung function, eye irritation and conjunctivitis, rhinitis
Douglas Fir West coast of North America,
Europe
Interior and exterior construction, flooring, boats, veneer, furniture Contact eczema, decrease in lung capacity
Fir
(grand, balsam, silver, alpine)
US and Canada
Europe (silver fir)
Interior construction, joiner, plywood Skin irritation, dermatitis, rhinitis, asthma, possible
decrease in lung function
Hemlock North America Furniture, cabinetry Skin irritation, decreased lung function
Larch Europe, North America Construction, frame work, boats, flooring Allergic dermatitis from European larch, no reports with western larch
Mahogany Africa Furniture, cabinetry, boats, mouldings, etc.- all purpose wood, used where good quality wood is required Dermatitis, sensitizer
Maple Europe, North America Furniture, interior construction, cabinets Rhinitis, asthma, Maple Bark Strippers’ Disease (mould
spores in bark)
Oak Europe, North America Furniture, decorative veneer Nasal cancer
Pine
(white, lodgepole, jack)
Europe, North America Interior and exterior construction, pulp and
paper
Skin irritation, contact dermatitis, Wood-Pulp Workers’ Disease (mould in bark), rhinitis, and asthma
Poplar Europe, North America Plywood, matches, toys, pulp and paper Contact dermatitis (with sawdust contact), rhinitis
Rosewood South America, Asia Decorative veneer, furniture, cabinets instruments Eczema, allergic contact dermatitis
Spruce Europe, North America Interior and exterior construction, furniture, pulp and paper Skin irritation, Wood-Pulp Workers’ Disease (mould spores in bark), decrease in lung function
Teak Asia, Africa, West Indies Ship building, interior fittings and mouldings,
furniture, flooring
Toxic, dermatitis, sensitizer
Walnut (black) Europe, US Veneer, cabinet making, furniture, decorative paneling, gun stocks Skin irritation, rhinitis, possible asthma
Yew Europe, Asia, North Africa Carving, veneer, cabinet making Irritation of skin, dermatitis, toxic