ʻO ka papa hoʻohui o ka hale pahu he papa sanwiti huluhulu aniani kūikawā.ʻAʻole hiki ke hoʻopau ʻia ka mea a he mea hoʻoheheʻe kiʻekiʻe, hiki ke hōʻea i ka helu ahi o ka papa A. ʻO ke kaumaha o ke aniani huluhulu he 64kg / m3, hiki ke emi iho ka conductivity thermal ma mua o 0.032w/m * k, a ʻOi aku ka nui o ke kani ʻana o ka insulation coefficient ma mua a i ʻole like me 30dB, hiki ke hōʻemi pono i ka hopena o ka walaʻau, ʻoi aku ka leo o loko o ka hopena o ka ua, ka huahekili a me nā hale ʻē aʻe.