Business Details
50+ Years
experience
Emergency
services
Your Trusted HVAC Partner in Chicago Since 1922
Deljo Heating has been a trusted name in HVAC services since 1922, serving Chicago and surrounding areas with a commitment to excellence and customer satisfaction. Our family-owned business combines over a century of experience with 24/7 emergency support and flexible financing options to meet the needs of residential and commercial clients. Our team of NATE-certified technicians delivers reliable heating, cooling, and plumbing solutions, backed by thousands of 5-star reviews and a century-old reputation for integrity.We prioritize regular maintenance programs to prevent system failures and offer transparent pricing with no hidden fees. As a Mitsubishi Diamond Dealer, we ensure superior technical expertise and access to advanced HVAC technologies. Our dedication to ongoing training and community service solidifies our position as Chicagos premier HVAC provider, with a focus on energy efficiency, indoor air quality, and long-term customer relationships.
Services
HVAC Repair
Furnace Installation
Boiler Maintenance
AC Repair
Plumbing Services
Drain Cleaning
Emergency Services
Indoor Air Quality
Maintenance Plans
Water Heater Repair
Details
- Year established: 1922
Highlights and features
- We offer 24/7 emergency HVAC services with 1-hour response times
- Our technicians are NATE-certified with 100+ years of combined experience
- We provide transparent pricing with no hidden fees
- We maintain a 4.9-star rating from 2,246 verified reviews
- We offer flexible financing options for HVAC replacements
Associations and certifications
- Mitsubishi Diamond Dealer
What people say
Prompt, reliable, trustworthy
Super helpful technicians
Professional and courteous
Resolved emergency quickly
Thorough explanations provided
Services
HVAC Repair
Our HVAC repair service addresses heating and cooling system malfunctions with 24/7 emergency availability. Technicians diagnose issues like refrigerant leaks, electrical failures, and component wear using advanced diagnostic tools. We prioritize same-day repairs with upfront pricing and lifetime workmanship warranties, serving Chicago's unique building stock from vintage homes to modern developments.
Furnace Installation
We offer complete furnace installation services with energy-efficient models from trusted manufacturers. Our certified technicians handle proper sizing, venting, and electrical connections to ensure optimal performance. We provide detailed system explanations and maintenance guidance, with financing options available for qualifying customers in Chicago's cold climate region.
Boiler Maintenance
Our preventive boiler maintenance includes combustion analysis, pressure checks, and component inspections to maximize efficiency. We service both firetube and watertube boiler systems, cleaning heat exchangers and replacing worn parts. Annual maintenance helps prevent emergency breakdowns during Chicago's winter months while extending equipment lifespan.
AC Repair
Emergency AC repair services address common issues like frozen coils, refrigerant leaks, and electrical failures. Our technicians carry common replacement parts for same-visit repairs and use digital diagnostics for accurate troubleshooting. We specialize in restoring cooling during Chicago's humid summer heatwaves with 24/7 service availability.
Drain Cleaning
Professional drain cleaning services utilize video inspection and high-pressure jetting to clear blockages in residential plumbing systems. We address grease buildup, tree root intrusion, and pipe corrosion issues while protecting Chicago's aging infrastructure. Preventive maintenance plans help avoid emergency backups in both modern and historic buildings.
Questions
Do you offer 24/7 emergency HVAC services in Chicago?
Yes, we provide 24/7 emergency HVAC repair services with technicians available for immediate response throughout Chicago and suburbs.
What areas do you service?
We serve Chicago and surrounding suburbs including Evanston, Glenview, Park Ridge, and Oak Park with same-day service available.
How often should HVAC systems be serviced?
Annual maintenance is recommended for both heating and cooling systems to ensure optimal performance and extend equipment lifespan.
Do you offer financing options for HVAC replacements?
Yes, we offer flexible financing plans through trusted partners for qualifying HVAC system replacements and major repairs.
Are your technicians certified?
All our technicians are NATE-certified with ongoing training at manufacturer-approved facilities including Mitsubishi's training center.
What HVAC brands do you service?
We service all major HVAC brands and models, including Carrier, Trane, Lennox, and Mitsubishi equipment.
Videos
