A Chinese-made drywall has been blamed for unpleasant odors and unusual air-conditioner problems in dozens of Florida homes, the Wall Street Journal reported. The US Consumer Product Safety Commission is investigating whether the sulfur-based gases being emitted from the drywall pose a potential safety hazard. Construction firm Lennar Corp has identified 80 Florida homes with defective Chinese drywall and is testing an additional 40. Taylor Morrison, a unit of UK builder Taylor Wimpey, said the problem was present in at least eight of its homes. The companies are relocating residents. The drywall was imported from China due to shortages in the US during the 2006 housing boom. Many builders say they were unaware the drywall was from China. Lennar recently filed a lawsuit alleging that the manufacturers should have known the drywall was defective.