Deljo Heating, Cooling & Plumbing

Deljo Heating, Cooling & Plumbing has kept Chicago homes comfortable since 1992, operating from two locations on the city's Northwest Side and nearby Park Ridge. With a 4.9-star rating accumulated across 3,234 reviews, this contractor serves neighborhoods including Albany Park, Avondale, Lakeview, and Wicker Park, while also extending reach to northern suburbs such as Arlington Heights, Evanston, and Skokie. The company holds multiple HVAC licenses and maintains a fleet of service vehicles staffed by factory-trained technicians available around the clock, every day of the week.

What distinguishes Deljo from neighboring contractors is the trio of credentials displayed prominently on their web presence: Mitsubishi Diamond Dealer status signifying advanced training on variable-speed heat pump systems, Carrier product partnerships, and the REME HALO whole-home air purification technology. They offer flexible financing on new installations and back their workmanship with guarantees that reviewers reference when discussing follow-up calls. The 3,800 active maintenance agreements currently on their books suggest a recurring revenue model that rewards consistent service over one-time calls.

Customer stories from verified reviewers describe specific scenarios. Taylor Braun needed a complete HVAC replacement and notes technician Matthew walked her through system options before the install crew arrived the next business day. Andy Bodine's review describes a technician using a scope camera to show him a cracked furnace heat exchanger rather than just stating the problem, then delivering a new system within 24 hours during subzero January temperatures. Another reviewer references technician Jesus diagnosing a stuck dampener within hours of a callsame-day.