HVAC contractor in Chicago for boiler system to furnace/AC

[Adam Sporinsky]

I'm searching for recommendations for HVAC contractors and companies that are investor friendly and have experience converting ~100 year old central boiler buildings to individual furnace and AC.  All meters already present, space for furnace already made.

This work would include running black pipe, adding ductwork and returns, installing furnaces and AC unit and any other required plumbing.  Furnace space already has a drain line and electrical power.  Drain line may need to be expanded.

Taking bids for 3 units this summer.  

Anyone capable of this work or know someone they worked with in the past that I should reach out to?