Business Details
50+ Years
experience
Emergency
services
Your Trusted HVAC Experts in Chicago Since 1922
Deljo Heating has been a trusted name in HVAC services since 1922, rooted in Chicago's history as Del-Nard Fuel Oil. Our century-long legacy reflects a commitment to excellence, evolving from furnace cleaning to comprehensive heating, cooling, and plumbing solutions. As a family-owned business, we prioritize reliability and care, offering 24/7 emergency support and flexible financing. Our Mitsubishi Diamond Dealer status ensures superior skill sets and sophisticated solutions for home temperature challenges. Technicians undergo rigorous training at manufacturer-approved centers, guaranteeing expertise in new product installations and ongoing customer care.With over 3,000 5-star reviews, we combine tradition with innovation to meet modern comfort needs. Our Goldstar Maintenance Agreement provides discounted diagnostics, seasonal maintenance, and priority scheduling. We serve Chicago and suburbs with services ranging from boiler repairs to ductless AC systems, emphasizing transparency and only recommending necessary repairs. Join generations of families who trust us to maintain their home comfort year-round.
Services
HVAC Installation
Emergency Repairs
Maintenance Plans
Plumbing Services
Air Quality Systems
Details
- Year established: 1922
Highlights and features
- 100+ years serving Chicago's HVAC needs
- 24/7 emergency service available year-round
- Flexible financing options for all customers
- 3,000+ 5-star reviews from satisfied clients
- Mitsubishi Diamond-certified technician training program
Associations and certifications
- Mitsubishi Diamond Dealer
What people say
Top-notch service
Knowledgeable technicians
24/7 emergency availability
Clear explanations
Affordable inspections
Services
HVAC Installation
We specialize in complete HVAC system installations for residential and commercial properties. Our certified technicians handle furnace, boiler, and air conditioning replacements with minimal disruption to your space. We offer energy-efficient models from trusted brands like Carrier and Navien, ensuring optimal performance and cost savings. All installations include comprehensive system checks and personalized operation guidance.
Emergency Repairs
Our emergency repair team responds promptly to HVAC crises at any hour. Whether your heating fails in winter or AC breaks mid-summer, we guarantee rapid diagnosis and effective solutions. Technicians carry common replacement parts for immediate fixes and work transparently to resolve issues without upselling unnecessary services.
Maintenance Plans
Goldstar Maintenance Agreements provide seasonal system tune-ups to prevent breakdowns and extend equipment life. Benefits include discounted diagnostics, 15% off repairs, priority scheduling, and expert advice for optimizing system efficiency. Regular maintenance helps catch developing issues before they become major problems.
Plumbing Services
We offer comprehensive plumbing solutions including water heater installation, drain cleaning, and pipe repair services. Our team handles emergency flood control and sewer line issues with modern diagnostic tools. We specialize in tankless water heater installations and whole-home water filtration systems for improved water quality.
Air Quality Systems
Improve your home's air quality with our REME HALO purifiers, whole-home humidifiers, and dehumidifiers. These systems reduce allergens, control moisture levels, and eliminate odors through advanced purification technology. We provide expert installation and maintenance for Carrier-branded air quality solutions.
People
Matt
HVAC Technician
Experienced technician specializing in system efficiency improvements and plumbing inspections. Provides clear explanations and practical solutions for residential HVAC needs.
Jesus
HVAC Specialist
Detail-oriented expert in humidifier repairs and heating system diagnostics. Known for courteous service and thorough problem resolution for Chicago homeowners.
Ernesto
Service Technician
Reliable specialist for furnace and air conditioning maintenance. Trusted by small businesses for consistent, high-quality HVAC service and preventive care.
David C
Emergency Technician
Recognized for prompt response during extreme weather emergencies. Provides honest assessments and practical advice for preventing future HVAC issues.
Juan
Boiler Specialist
Experienced in boiler replacements and system efficiency upgrades. Educates customers on optimal heating system operation during installations.
Questions
What HVAC services does Deljo offer in Chicago?
We provide heating and cooling system installations, repairs, and maintenance, including furnaces, boilers, air conditioners, and ductless systems.
Do you offer emergency HVAC service?
Yes, our 24/7 emergency service responds to heating and cooling crises at any time, with technicians available for immediate assistance.
What financing options are available?
We offer flexible financing plans for HVAC replacements and major repairs, with options to suit different budget requirements.
Which areas do you service?
We serve Chicago and surrounding suburbs including Evanston, Glenview, Northbrook, Park Ridge, and Skokie.
How can I improve indoor air quality?
We install REME HALO purifiers, whole-home humidifiers, and dehumidifiers to address specific air quality concerns in residential spaces.
What maintenance plans are available?
Our Goldstar Maintenance Agreement includes seasonal tune-ups, discounted diagnostics, 15% repair discounts, and priority scheduling for HVAC systems.
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Reviews (2)
Adrienne Butler
Apr 08, 2018
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Reliable services. I have used them for years and the service technicians are always friendly, reliable, knowlegable. Highly recommend!
Kat Johnson
Jun 15, 2017
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I am always impressed with the service I get from Deljo! They have been responsive and very fair in the prices. Costs have usually come in less than.
