You'll never get it!
1. 80% furnace vented into brick chimney, no tile liner, no metal liner
2. 4 ton Bard on Trane with 3 ton drive. Duct capacity about 3 tons max.
Stand by for the after picture on the Wall of Pride! Old house used as hair salon. Will have 5 ton air, 80% with 5 ton drive, chimney liner and full duct capacity!
They better have a space guard anyone coming back in the future to clean that evap. will be there for days.
Holes in the heat exchanger caused by chemicals from hair salon leaking air into the the heat exchanger and out the chimney.
Just a guess ;)
Im suprised the chimney is not damaged from condensate the furnace would make. Water freezing and expanding between cycles can break that baby apart without a liner. Good luck with the new 5 ton.
You are using the wrong tool pouch. Terrible for productivity.
Asbestos siding and water in the basement. Along with the HVAC problems, this house is a real fixer-upper.