RHEEM HAS BEEN A TOP TIER HVAC MANUFACTURER FOR 100 YEARS AND CONTINUES TO INNOVATE WITH NEW TECHNOLOGY WITH GREATER COMFORT & EFFICIENCY WHILE CONTINUING TO MANUFACTURE AGE OLD PRODUCTS FOR INSTALLATIONS SUCH AS THIS WHERE ONLY 1 UNIT WOULD FIT DUE TO ORIGINAL CONSTRUCTION PARAMETER CONSTRAINTS. LUCKILY FOR THIS HOMEOWNER I WAS ABLE TO USE AN IDENTICAL INDOOR UNIT IN THEIR ATTIC SPACE WITHOUT HAVE TO RE-ENGINEER THE ATTIC AND MAKE MAJOR CHANGES TO THE DUCT WORK SYSTEM SAVING THEM THOUSANDS OF DOLLARS.