Commercial Unit Heater Installation, Repair & Service in Chicago
Don't let cost delay a repair or install that can't wait. Ask us about financing.
Authorized Lennox dealer (also Carrier & Green authorized)
Family-Owned Since 2009
EPA Certified Technicians
4.8★ Google Rating · 90+ Reviews
What Our Unit Heater Service Covers
We handle unit heaters from the ground up — installation through ongoing service — so you're not sourcing equipment from one place and labor from another.
- Unit heater installation for new construction and retrofit applications
- Gas-fired and electric unit heater options sized for commercial and industrial loads
- Repair of existing unit heaters, including burner, heat exchanger, and controls issues
- Preventive maintenance to keep equipment running through peak heating season
- Replacement of aging or undersized equipment with current Lennox product lines
- Service for garages, warehouses, loading docks, auto shops, storage facilities, and light manufacturing spaces
Every job is handled by EPA certified technicians who work on commercial equipment regularly — not residential technicians filling in on commercial calls.
When winter hits Chicago, open commercial spaces feel it fast. High ceilings, large doors, concrete floors, and minimal insulation make warehouses, auto shops, loading areas, and industrial facilities some of the hardest spaces to heat efficiently. A unit heater is the right solution for exactly these environments — delivering direct, powerful heat where it's needed without the infrastructure demands of a central duct system.
As an authorized Lennox dealer, we install, repair, and service commercial unit heaters sized for the demands of large, open-plan spaces. Whether you're heating a single-bay garage or a multi-zone warehouse, we'll match the right equipment to your square footage, ceiling height, fuel source, and usage pattern.
Built for Warehouses, Garages, and Industrial Spaces
Maintenance Agreements Keep Industrial Equipment Off Your Worry List
Unit heaters in commercial and industrial environments run hard. Dust, debris, and heavy cycling take a toll on burners, heat exchangers, and ignition components over time. Deferred maintenance is the most common reason a unit heater fails mid-winter — right when you need it most.
D's maintenance agreement members receive priority scheduling and 15% off parts and service. For facility managers and property owners running multiple units across a building, that combination adds up fast. One agreement covers the equipment; we handle the rest. If something does go wrong, agreement members move to the front of the line — no waiting through a cold snap for a service window.
What Our Customers Say
See why our neighbors keep calling us back. Book Online and find out for yourself.
Common Questions About Commercial Unit Heaters
What types of spaces are unit heaters best suited for?
Unit heaters work best in open, high-ceiling spaces where a central duct system isn't practical — warehouses, loading docks, auto repair shops, garages, storage facilities, and light manufacturing areas are the most common applications. They deliver heat directly into the space without requiring ductwork, which makes them cost-effective to install in buildings that weren't originally designed for forced-air systems.Unit heaters work best in open, high-ceiling spaces where a central duct system isn't practical — warehouses, loading docks, auto repair shops, garages, storage facilities, and light manufacturing areas are the most common applications. They deliver heat directly into the space without requiring ductwork, which makes them cost-effective to install in buildings that weren't originally designed for forced-air systems.How much does commercial unit heater installation cost in Chicago?
Installation cost depends on the size of the unit, the fuel source, the condition of existing gas or electrical infrastructure, and the number of units required for the space. We assess your facility before quoting so the number reflects your actual job — not a generic estimate. Contact us or book online to schedule a site evaluation.Installation cost depends on the size of the unit, the fuel source, the condition of existing gas or electrical infrastructure, and the number of units required for the space. We assess your facility before quoting so the number reflects your actual job — not a generic estimate. Contact us or book online to schedule a site evaluation.Can you repair a unit heater that's already installed, or only install new ones?
We repair existing unit heaters as well as install new equipment. Common repair needs include ignition failures, burner issues, heat exchanger problems, and thermostat or controls malfunctions. If a unit is beyond cost-effective repair, we'll tell you honestly and walk you through replacement options from the Lennox product line.We repair existing unit heaters as well as install new equipment. Common repair needs include ignition failures, burner issues, heat exchanger problems, and thermostat or controls malfunctions. If a unit is beyond cost-effective repair, we'll tell you honestly and walk you through replacement options from the Lennox product line.Do Lennox unit heaters require authorized-dealer installation?
Lennox equipment is sold and installed through an authorized dealer network to ensure proper sizing, installation, and warranty coverage. As an authorized Lennox dealer, D's Air & Heating can supply and install Lennox unit heaters with full manufacturer warranty protection in place.Lennox equipment is sold and installed through an authorized dealer network to ensure proper sizing, installation, and warranty coverage. As an authorized Lennox dealer, D's Air & Heating can supply and install Lennox unit heaters with full manufacturer warranty protection in place.How often should a commercial unit heater be serviced?
Annual preventive maintenance before the heating season is the standard recommendation for commercial unit heaters. In high-use environments — facilities that run equipment heavily or in dusty conditions — a mid-season inspection can catch wear before it becomes a failure. Our maintenance agreements make it easy to stay on schedule without tracking it yourself.Annual preventive maintenance before the heating season is the standard recommendation for commercial unit heaters. In high-use environments — facilities that run equipment heavily or in dusty conditions — a mid-season inspection can catch wear before it becomes a failure. Our maintenance agreements make it easy to stay on schedule without tracking it yourself.
Have a financing question we didn't cover? Contact us or call 773-940-0965.
Don't freeze, call D's… Don't let cost hold off a repair or install that can't wait. Get a free estimate online, or call 773-940-0965.
