Commercial building materials of board type assembled into a box shape, were each independently combusted in a semi-full-scale room along with methanol, which was supplied at a constant rate, under the conditions of forced air supply by blower.
Primary toxic gases were CO and acrolein from wood-based materials, and CO and HCN from urethanes. From phenol foams, evolution of CO and other toxic gases was very small.
A comparison was made between the evolution of toxic gases from materials assembled in a box shape and also in a crib shape. It was found that the total toxicity, E(C1/C fi), and concentrations of the above toxic gases were much higher for the box shape than for the crib shape.
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