Deljo Heating, Cooling & Plumbing

About Deljo Heating, Cooling & Plumbing

Deljo Heating, Cooling & Plumbing serves Chicago and nearby suburbs with heating, cooling, and plumbing work. The company has operated since 1922 and provides heating and cooling maintenance, installation, and repair, along with plumbing services. Its technicians work on furnaces, boilers, radiators, heat pumps, smart thermostats, air conditioners, ductless systems, water heaters, toilets, drains, and plumbing inspections. Deljo offers 24/7 live call support and priority emergency dispatch for heating and air conditioning problems. Before repairs begin, technicians explain the issue and provide upfront pricing. The company also offers flexible financing and a maintenance program with seasonal visits and priority scheduling. Service areas include Chicago, Park Ridge, Naperville, Evanston, Skokie, Oak Park, and other communities.

At a glance

Trades

HVAC, Plumbing

In business

104 years (since 1922)

Service area

Chicago, Park Ridge, Naperville, Arlington Heights, Deerfield, Des Plaines, Evanston, Glenview, Highland Park, Lake Forest, Lincolnwood, Mount Prospect, Niles, Northbrook, Oak Park, River Forest, Skokie, Wilmette, Winnetka, Bolingbrook

Address

4300 W Bryn Mawr Ave, Chicago, IL 60646

Highlights

Financing availableEmergency service

Services

• Heating maintenance
• Heating installation
• Heating repair
• Emergency heating service
• Air conditioning maintenance
• Air conditioning installation
• Air conditioning repair
• Emergency AC service
• Furnace repair
• Boiler service
• Heat pump repair
• Smart thermostat service
• Ductless systems
• Water heater installation
• Drain cleaning
• Plumbing inspections

How the 90 score breaks down

Scores are calculated the same way for every company. See the method.

What customers say

Bashar from Deljo did a lot of work at my Chicago condo over two days: he installed a new 40-gallon water heater, replaced a dozen old shutoff valves under the sinks with quarter-turn ones, put in a new bathroom faucet, and came back the next day to replace the main water shutoff. He was thorough, clean, and easy to…

Google review, Oct 31, 2026

Matt did a great job and was a true professional. Good price and Deljo responded to my problem day of.

Google review, Oct 30, 2026

Very friendly and efficient service while doing our fall furnace inspection today. We will specifically ask for Gregory for future service!

Google review, Oct 30, 2026

Rating distribution and reviews from the company's public Google listing.

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