HTH Mechanical is a union H.V.A.C. company serving the greater Chicagoland area. Our office staff has over 100 years combined experience in all facets of the heating and cooling industry including residential, commercial, and design build applications. Currently on staff are union trained sheetmetal workers, shop mechanics, and service technicians from locals 265 and 73 along with pipefitters from local 597. We also utilize the latest CAD software to provide detailed drawings, BIM coordination, and aid in project design. Combined we can handle any size project new or existing.