Product Overview Tech Specs Manuals and Guides Product Overview The 193840 is a replacement fan guard. It is for use with Reznor WS190/238 Hydronic Unit Heaters. Photo is for illustration only - actual item may differ in appearance. Tech Specs Product Type: Guard California residents see Prop 65 WARNINGS WARNING! Warning: Cancer and Reproductive Harm - www.p65warnings.ca.gov Product Manuals Load More