______ insulation is a closed-cell rigid foam board that uses a low-conductivity gas (usually an HCFC) to fill the cells.
A) Polyisocyanurate
B) Fiberglass
C) Extruded polystryrene (XPS)
D) Expanded polystyrene (EPS)

Question

Quizplus · Accepted Answer

Polyisocyanurate insulation is a closed-cell rigid foam board that uses a low-conductivity gas, often an HCFC, to fill the cells, providing high thermal resistance.

______ Insulation Is a Closed-Cell Rigid Foam Board That Uses