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Steffen HTG & A/C INC

"Family Tradition Since 1956"

About Us

Steffen HTG & A/C Inc. has been a trusted name in HVAC services since 1956, proudly serving Effingham, IL and a wide network of surrounding communities. Our service area includes Paris, Newton, Beecher City, Salem, Flora, Mattoon, Charleston, and beyond—bringing expert heating, cooling, and comfort solutions to homes and businesses across the region.

As a long-standing leader in HVAC systems, we specialize in installation, repair, and maintenance, along with mobile home parts, fireplaces, and indoor air quality products. With decades of experience and a commitment to customer satisfaction, our team delivers dependable, high-quality service tailored to your needs.

Whether you're in Effingham or any of the neighboring towns we serve, discover why generations have trusted Steffen HTG & A/C Inc. for reliable climate control. Contact us today and experience the difference.

Our Story

Since 1956, Steffen HTG & A/C Inc. has been a trusted cornerstone of comfort for families and businesses throughout Effingham, IL and the surrounding communities. What began as a small, dedicated operation has grown into a leading HVAC provider serving areas including Paris, Newton, Beecher City, Salem, Flora, Mattoon, Charleston, and beyond. While the industry has evolved over the decades, one thing has remained constant—our commitment to delivering reliable service, quality craftsmanship, and honest solutions our customers can depend on.

Built on a foundation of hard work and integrity, our company has proudly served multiple generations of customers. We understand that comfort isn’t just about temperature—it’s about creating spaces where people can relax, gather, and feel at ease year-round. That’s why we offer comprehensive heating, cooling, and ventilation services designed to meet the unique needs of both residential and commercial clients. From installing high-efficiency furnaces and air conditioning systems to servicing geothermal units, radiant floor heating, and heat pumps, our experienced team is equipped to handle projects of every size and scope.

At Steffen HTG & A/C Inc., we believe no two homes or businesses are the same. Our custom installation services are tailored to your specific needs, ensuring every system is designed for optimal performance and efficiency. We take pride in our attention to detail, working closely with our customers to deliver solutions that enhance comfort, functionality, and long-term value. To make the process even easier, we offer free estimates with transparent pricing, helping you plan confidently without pressure or surprises.

Beyond HVAC, we have expanded our expertise to include a wide range of home comfort and lifestyle solutions. We specialize in fireplaces and inserts, offering gas, wood, and electric options that bring warmth and style to any space. Whether you’re upgrading your living room with a modern gas fireplace or creating an inviting outdoor retreat with a custom fire pit or outdoor kitchen, our team is here to bring your vision to life. We also provide grills, smokers, stainless steel outdoor kitchens, mantels, and premium finishes like cultured stone, marble, and granite to elevate your indoor and outdoor living experience.

Understanding the importance of air quality, we offer advanced solutions including humidifiers, air cleaners, plasma air purifiers, and whole-house dehumidifiers to ensure your environment is as healthy as it is comfortable. Additionally, we carry a full selection of mobile home parts and fixtures—from furnaces and air conditioners to tubs, sinks, doors, windows, and plumbing components—making us a one-stop resource for homeowners.

When emergencies happen, you can count on us. Our 24/7 emergency service ensures that no matter the time or season, help is just a phone call away at 217-342-2763. Located just off North Route 45, two miles north of I-70, our team is always ready to respond quickly and restore comfort to your home or business.

For nearly seven decades, Steffen HTG & A/C Inc. has remained dedicated to quality, reliability, and customer satisfaction. We’re proud of our history and even more excited about continuing to serve our community for generations to come.

Areas Served

Altamont, IL | Beecher City, IL | Charleston, IL | Dieterich, IL | Effingham, IL | Greenville, IL | Flora, IL | Mattoon, IL | Neoga, IL | Newton, IL | Olney, IL | Paris, IL | Robinson, IL | Salem, IL | Shelbyville, IL | Sigel, IL | Teutopolis, IL | Tuscola, IL | Vandalia, IL | Clay County, IL

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Testimonials

On 6/9/2026 Shirley Bailey had this to say:
Steffen heating and air conditioning have kept our furnace and a/c running smoothly for over 13 years. We are thankful for their great, prompt and professional service. Thank you so much! Don and Shirley Bailey

On 5/6/2026 Sandy Lohman had this to say:
They got us in, in a timely manner. The installers made very little mess.

On 2/12/2026 Dan Hennecke had this to say:
Great service! Fast efficient installation. Very polite servicemen. Respectful to not track dirt into house. Testimonial written by Dan Hennecke on this site.

On 2/10/2026 Robin Sesko had this to say:
We had a small issue with our furnace recently. The furnace was running on auxiliary heat all of a sudden on the coldest day of the year and not keeping up. We called Steffen, and they came out right away to take care of our problem. They checked everything and found an additional problem and corrected it. They cleaned all the furnace components and made sure everything was running properly before they left. They were very professional, and explained everything they did and how the furnace and heat pump worked together so we were aware. We have been very happy with the service they have provided for us in regards to our heating and AC situation. We would recommend them to anyone in the Sullivan and surrounding area in need of a new system or service. Testimonial written by Robin Sesko on this site.

On 2/9/2026 Anonymous had this to say:
Jody and the whole crew at Steffen HTG & A/C are incredibly easy to work with! They are professional, prompt, and make the entire process seamless. It's hard to find that level of customer service these days...Highly recommend them for any HVAC needs! Testimonial submitted anonymously directly to this site.

Contact Us

Steffen HTG & A/C INC
15214 E 1800th Ave Effingham, IL 62401
Phone: (217) 342-2062
Emergency Line: (217) 342-2763
Fax: (217) 347-7434

24/7 Emergency Service Line 217-342-2763

Off North Route 45. Two Miles North of I-70. West of N Rt 45, Across the Railroad Tracks to First Building on the Right

Where To Find Us

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Payment Types Accepted

Personal Checks, MasterCard, Visa, Discover

Our Hours

24 Hour Emergency Service

Holiday Hours May Vary. Please Call For Details.

Monday: 7:00 AM - 4:30 PM
Tuesday: 7:00 AM - 4:30 PM
Wednesday: 7:00 AM - 4:30 PM
Thursday: 7:00 AM - 4:30 PM
Friday: 7:00 AM - 4:30 PM

News

🔥 Your Fireplace is Ready for Cozy Nights! 🔥
Steffen Heating has just cleaned and serviced your fireplace, ensuring it’s safe, efficient, and ready to keep you warm this season.
✅ Professional cleaning
✅ Reliable maintenance
✅ Peace of mind for your home
Enjoy the comfort and warmth without worry!
Need service for your fireplace or heating system? Contact Steffen Heating today!

🌧️ Feeling sticky, damp, or uncomfortable at home?
You might be dealing with excess humidity — and that can lead to warping wood, mold, mildew, and even pests. 😬
💧 Did you know?
The Aprilaire E100 can remove up to 100 pints of moisture in just 24 hours, and the E080 handles 80 pints in the same time! That’s whole-home protection — not just one room.
🏡 With an Aprilaire Whole-House Dehumidifier, you’ll enjoy:

Healthier air
Fewer allergens
Protected wood furnishings
Lower energy bills

🎉 Celebrate the end of summer with sizzling savings! Our E100, originally priced at $3,000, is now available for just $2,640. Plus, the E080, regularly $2,645, is on sale for $2,325. Don't miss out on these incredible offers—grab them before they're gone!

📞 Call us today and breathe easier with Aprilaire!

🔥 HUGE Electric Fireplace Liquidation Sale at Steffen HTG & A/C INC!🔥 We're clearing out our stock with unbeatable prices ranging from $300 to $1,300. Whether you're looking for something compact or grand, we've got the perfect size to fit your space. Hurry in while supplies last and bring warmth and style to your home this season! Check out our video featuring the fireplaces at the bottom of our imagery tab.

At Steffen HTG & A/C Inc, ensuring your comfort and safety is our highest priority, no matter the time of day or night. We provide 24/7 emergency services for HVAC systems, mobile home heating, and fireplace concerns. From frigid winter evenings to scorching summer weekends, our skilled technicians are always just a call away, prepared to bring comfort back to your home when you need it the most.

🌞 Are you ready for the warmer weather? Make sure your AC is too! Steffen HTG & A/C provides expert tune-ups to ensure your unit runs smoothly all summer. Stay cool and comfortable!

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FAQ

Do you work with residential and commercial customers?
Our expert team provides comprehensive sales and service for both commercial and residential clients. Whether it's a large business project or a home improvement, we ensure quality and satisfaction with every service.
What is Steffen / Steffes heating / ETS?
The Steffes system (often spelled “Steffen” or “Steffes”) refers to Electric Thermal Storage (ETS) heating. In an ETS system, electricity is used (often during off-peak hours) to heat a dense thermal mass (e.g. ceramic bricks), which then stores and releases heat over time.
How does the ETS / Steffes system work?
During low-cost or off-peak electricity periods, the system charges (heats) the thermal mass.

As the ambient temperature drops, the stored heat is gradually released into your home to maintain comfort.

Because the heat is “pre-stored,” it can deliver performance during peak times while using cheaper off-peak power.
What are the advantages of using an ETS / Steffes system?
Potential energy cost savings by leveraging off-peak electricity rates.

Minimal maintenance (no burners, no oil, no combustion byproducts).

Cleaner and safer: no CO (carbon monoxide) emissions from combustion, no fuel storage required.

Predictable, consistent heating (less fluctuation).
What kind of maintenance does a Steffes / ETS system need
Very minimal. Because there are no combustion parts, fuel, or soot, routine maintenance and cleanings are reduced.

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