Feem ntau muaj peb hom iav siv hauv iav tsev cog khoom. Hollow iav, ntab iav, tempered iav.
Yav dhau los, cov iav uas siv hauv tsev iav tsev cog khoom feem ntau yog ntab iav, feem ntau yog siv ob qhov ntau thiab tsawg: 4 hli thiab 5 hli tuab. Thaum lub sij hawm ntawd, 4 hli tuab iav feem ntau yog siv nyob rau hauv cov teb chaws Europe thiab Amelikas, thiab tsuas yog 5 hli tuab iav tau siv nyob rau hauv cov nyom nyom.
Nyob rau hauv Suav teb, 5 hli tuab iav tau dhau los ua ib qho kev qhia tshwj xeeb rau iav tsev cog khoom vim nws ua raws li cov kev cai ntawm kev tsim kho vaj tse. Nrog rau tus naj npawb ntawm cov tsev cog khoom tuaj txawv teb chaws thiab kev nqis peev ntawm txawv teb chaws iav tsev cog khoom hauv Suav teb, 4 hli tuab iav yog maj mam siv rau hauv iav tsev cog khoom hauv Suav teb.
Niaj hnub no, tempered iav feem ntau yog siv, uas tau tempered los ntawm ntab iav thiab yog ruaj khov dua. Feem ntau, sab saum toj ntawm lub tsev cog khoom iav zoo yog ua los ntawm 5 hli tempered iav, thiab thaj chaw ib puag ncig yog ua los ntawm 5+6+5 iav insulating. Anti condensation khoom ntawm insulating iav yog zoo. Vim tias muaj cov desiccants hauv cov iav insulating uas tuaj yeem nqus dej molecules, cov roj tau qhuav, thiab thaum kub poob, Cov iav insulating sab hauv yuav tsis tsim condensation.
