• 1 m³ of solid structural timber causes 80 kg of CO₂ during production, while approx. 300 kg of CO₂ are emitted for the production of 1 m³ of reinforced concrete.

• Replaces building materials with negative ecological impacts - Life cycle assessment improvement

• Supports regional sustainable development at the economic and societal level - adding value and securing jobs domestically.

• low dead weight - high load capacity

• regulates indoor climate and room temperature - contributes to healthy living

• Wood insulates about 20 times better than concrete - 6.5 cm of softwood is as effective for insulation as 40 cm of solid brick

#biogenic: stomata on the surface of leaves and needles absorb CO₂ and trees build sugar from it.

• These carbohydrates serve on the one hand as a source of energy, and on the other hand as a building material from which trees produce wood, bark, roots, leaves and needles. -> 6 H₂O + 6 CO₂ = 6 O₂ + C₆H₁₂O₆ (Glucose)

• As long as a tree lives and grows, it absorbs more CO₂ than it releases through cell respiration. Only when the tree dies and is decomposed by microorganisms does it return the stored carbon to the air.

• If the wood is installed, the absorbed CO₂ remains stored for long periods of time.

• After harvesting, softwood is processed into raw logs on state-of-the-art chipping and circular sawing equipment and then dried in fully automatic, computer-controlled drying kilns.

• The resulting sawmill by-products, such as bark, chips, and shavings, are used without residue to generate energy, produce paper, or manufacture wood-based materials.

• 1 m³ wood weighs 493 kg, of which 45 % is bound atmospheric carbon -> 1 m³ wood contains 220 kg C

• During photosynthesis, 3.6664 kg CO₂ = 1 kg C is bound in the wood. 220 kg carbon (1 m³ wood) binds 807 kg CO₂.

• Growth of 1 m³ of wood removes 807 kg CO₂ from the atmosphere (without processing/transport etc.)

• The provision of raw materials, transport and production of 1 m³ of KVH emits 80.07 kg of CO₂, mainly due to the use of fossil fuels.

• - 727 kg CO₂ manufacturing emissions Module A1-3

  Raw material provision A1: - 768.7 kg CO₂

  Transport A2: 9.52 kg CO₂

  Production A3: 32.25 kg CO₂

• Wood grows without producing additional energy and pollutants. On the contrary, trees provide oxygen and clean the air.

• Wood is available nearby. Thanks to short transport routes, additional CO₂ emissions are avoided.

• The Swiss forest has the highest supply of living trees in all of Central Europe.

• Every year, 10 million m³ of wood grows in Switzerland.

• Without overexploiting the forest, 7 to 8 million m³ of wood could be harvested annually. Used over longer periods of time, atmospheric carbon is thus naturally sequestered.

• The CO₂ release at the end of the life cycle is shown in Module D Recycling Potential according to German ÖKOBAUDAT. There is a credit through e.g. combustion in a CHP plant and thus substitution of electricity & heat from fossil sources.

• Module D is not applied in the Swiss KBOB, therefore the overall CO₂ balance of KBOB is worse than in ÖKOBAUDAT.

• CO₂ calculation according to ÖKOBAUDAT current version 2021-II from 25.06.2021 according to EN15804+A2

• Association of Swiss Forest Owners e.V.

• FOEN (2007) 'CO₂ effects of the Swiss forestry and timber industry'.