Furnace Replacement Value from home warranty

[Ernest Ho]

In my 2/1 rental unit, the furnace is very outdated and needed to be replaced.  My home warranty can replace, but does not cover the pipe and duct work.  Since the furnace is located in the basement (not habitable with no return air), the duct and return air work not covered is fairly significant.    The alternative is use another supplier and get a cash value from home warranty.    In your experience, what's a reasonable amount they typically offer, as a cash-in-lieu amount?