Took pictures of ducts, attic access is very limited. Stated that when originally first installed, enlarging the return was not possible, will get with management. Found system was low on refrigerant, added 3.5 lbs 410a to spec. No traces of uv dye or leak detected today, will reschedule feb. 8 to pressurized system and search for leak. System is currently heating with 27 temp split.