Our HVAC Experts

Only the Best for Our Customers

For years, Nicor Home Services has provided heating and air conditioning services to thousands of residential customers in northern Illinois. The company does business locally as D.M. Dykstra & Co., Hawthorn Heating and Air Conditioning, and Tradewinds Heating and Air Conditioning.


D. M. Dykstra & Company

Established: 1926
Service Areas: South suburbs
Location: Crestwood
Phone: 708-371-3220

Hawthorn Heating and Air Conditioning

Established: 1986
Service Areas: North suburbs, Rockford
Location: Elk Grove Village
Phone: 847-487-1700 (North suburbs)
815-965-0800 (Rockford)

Tradewinds Heating and Air Conditioning

Established: 1977
Service Areas: West suburbs
Location: Naperville
Phone: 630-718-2700


Our operations exemplify the ethical standards and business practices customers expect and deserve. The following ideals describe our business philosophy.

Clear Pricing Practices

Our equipment installation price is a contract price, not an estimated price. Our goal is to provide a clear understanding of the investment you are making.

Honest Straightforward Approach

HVAC equipment is usually a once-in-a lifetime purchase. To help you make your decision, we provide unbiased industry information that is legally reviewed to ensure an accurate representation of the product. There are no pricing gimmicks, promises of “free” equipment, or selling tactics that give the impression of value.

Partner for Life

We view our customers not as “one-time” home visits, but as lifetime customers. We offer up to a 20-year extended warranty on select models and a 12-month money back guarantee, which reflects our commitment to building a partnership with you. Just look for our sticker on your equipment.

Service Standards

Our technicians specialize in and are dedicated to their areas of expertise: installation, repair, maintenance or indoor air quality. That dedication means your work will be done right. Nor will we redeploy our technicians in the middle of your service call to cover an emergency or technician shortage. With over 100 vehicles and 100 employees in the field, we can meet the needs of our customers without compromising individual service.

Business Excellence – What Makes Us Unique

We are proud of all of our industry awards, certifications and affiliations.
They represent who we are as a company. Nicor Business Awards