FIX vs CNI Comparison

Comfort Systems USA Inc provides comprehensive mechanical contracting services, including heating, ventilation, & air conditioning, or HVAC; plumbing; piping & controls; construction; and other electrical components. Projects are mainly for commercial, industrial, & institutional buildings, & tend to be geared toward HVAC. Revenue is roughly split between installation services for newly constructed facilities & maintenance services for existing buildings. The company installs & repairs products and systems throughout the United States. It operates in two segments, Mechanical services & Electrical services, the majority is from the Mechanical services segment.

Canadian National's railway spans Canada from coast to coast and extends through Chicago to the Gulf of Mexico. In 2025, CN generated CAD 17.7 billion in revenue by hauling intermodal containers (22% of consolidated revenue), petroleum and chemicals (21%), grain and fertilizers (23%), forest products (10%), metals and minerals (11%), automotive shipments (5%), and coal (5%). Other items constitute the remaining revenue.