Formaldehyde Emissions from Fibrous Glass Insulation Products

摘要

The formaldehyde (CH sub 2 O) emission potential of fibrous glass insulation acquired from the three largest US manufacturers has been investigated. Screening measurements of unfaced and kraft-faced R-19, foil-faced R-11, and one inch unfaced insulation made with a formaldehyde surface emission monitor (FSEM) demonstrate low inter-product and inter-manufacturer variation in CH sub 2 O emission rates. The FSEM screening data and environmental chamber measurements of unfaced R-19 insulation taken at 23 deg C and 50% relative humidity (RH) both indicate CH sub 2 O emission rates of 0.02 +- 0.01 mg/m exp 2 h after one to three months of product conditioning in low CH sub 2 O concentration atmospheres. Threefold to fourfold increases in CH sub 2 O emissions were measured in environmental chamber tests taken at 38 deg C and 68% RH, conditions simulating potential seasonal exposures in attic and wall cavities adjacent to indoor compartments. However, a two-compartment model describing the potential impact of attic insulation at 38 deg C and 68% RH on indoor CH sub 2 O concentrations indicates a maximum increment of only 0.02 ppM. (ERA citation 11:011865)