Out to estimate replacement of split system, upflow furnace in closet. Client adding on to home, upsizing from 1200sf to 2000sf. Recommend replacing equipment and upsizing to 4 ton and running new ductwork to new addition, and leaving existing ductwork on existing section of home. Existing ducts are in good condition. After talking to client, informed they got bids from $6400 and $8200 to similar work. Did my best to estimate minimal cost to perform but for my recommendation on what should properly be done, lowest bid I can come up with is $13,250.