Assertion: chimney thimble | /r/CapableOf | reduce minimum 18 inch clearance
Facets:
value: to combustibles
type: TRANSITIVE-OBJECT
Source sentences:
text: The Insulated Chimney Thimble is an engineered and listed through-the-wall insulated thimble assembly that reduces the minimum 18 inch clearance to combustibles required by N.F.P.A. 211 standard.