[. . . ] [. . . ] Mount unit on metal housing if there is a portion of metal duct available. If a metal housing is not available, you may need to fabricate a mounting box. HEAT PUMP WITH SEPARATE AIR HANDLER ATTIC INSTALLATION HEAT PUMP WITH SEPARATE AIR HANDLER (IN THE ATTIC OR CRAWL SPACE) Step 1: Identify which type of system you have. Step 3: Choose best location for installation per diagram on reverse side of this page. [. . . ] [. . . ]