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Get the Best Heating System for Your Needs and Budget: Expertly Installed and 100% Satisfaction Guaranteed

If you need a new or more energy-efficient furnace replacement, we can help you find the right HVAC upgrade for your Chicago home that will keep you comfortable during even the coldest days of winter.


Our HVAC technicians are well-versed in installing all types and sizes of furnaces, including Trane furnaces that are between 80 and 90+ percent efficient, which can help you save money on your heating bills.


2 Year 100% Satisfaction Guarantee

If you aren’t 100% satisfied with your new HVAC system in the first 2 years, we will do everything we can to remedy the situation for you. If we can’t, we will remove the system we installed and install a brand new system at our expense.

Do I Need a New Furnace

  • Age of Current Unit - Our experience tells us that the average unit life expectancy in our area is 15 years. If your equipment is over 10 years old and facing any of the reasons below, you should consider replacing instead of repairing.
  • Frequent and/or Expensive Repairs - If your furnace is starting to need repairs on an almost annual basis, it’s near the end of its lifespan.
  • Out of Warranty Repairs - Repairs to your furnace that are outside of the manufacturer parts warranty can be very costly. Motor replacements can cost between $500 - $1,000. Heat exchanger replacements can be $2,500+.
  • Home Isn't Comfortable - Do you have a hard time keeping your home warm? This could be the sign of an aging furnace, or even an incorrectly sized system. Regardless of the cause, you want your home heating system to do its job!
  • Utility Bills Are Too High - According to Energy Star, “Energy Star certified furnaces have higher Annual Fuel Utilization Efficiency (AFUE) ratings and higher efficiency blower motors making certified gas furnaces, on average, over 1o percent more efficient than standard models.”


Furnace Installation & Replacement Steps

  1. Request a Free Installation Estimate – Use this form or call us at (815) 455-7000.
  2. Book a Consultation Appointment - Before looking at replacement units, we’ll schedule a consultation with you so we understand your budget and unique home comfort needs. No inflexible time windows—the date and time that is convenient for you is what you will get.
  3. Receive Upfront Options & Pricing That Fit Your Needs – Our highly trained Comfort Specialist will measure and evaluate your home, then present options based on the systems that match your needs. All pricing is quoted upfront with no surprises.
  4. Have Your New System Installed – We make it a priority to install your system as soon as possible, according to your schedule. In most cases, we’re able to make it happen within 24 hours!
  5. Enjoy Maximum Comfort

Experience You Can Trust for Your Furnace Installation

Althoff has been installing, replacing, and upgrading furnaces in Chicago and the surrounding suburbs for nearly 60 years. Quality craftsmanship, dedicated personnel, and creative management staff have nurtured the continued growth of our company into one of Chicagoland’s most sought after contractors.

  • Family owned and operated
  • Licensed, insured, and bonded
  • True 24 hour service
  • Live phone operators and staff
  • Employees drive marked vehicles and wear a uniform & ID badge
  • We perform a size analysis on every job
  • We quote firm prices upfront
  • We install only quality brands and products
  • Professionally trained installers
  • Ongoing training in our state of the art training lab
  • We clean up when we’re done
  • We offer a variety of payment options
  • Satisfaction guaranteed


"Matt knows our systems and definitely knows what he is doing. We have total confidence when he leaves that everything is done correctly."

~ T.S from North Barrington, IL


"Althoff's is a very good company who always gives great service and timely service by well-trained technicians. We are delighted to do business with this company!!"

~ R.G. from Crystal Lake, IL


"The tech was on time, efficient, and extremely knowledgeable. I would definintly use this individual again, if or when I need this kind of help."

~ M.S. from Crystal Lake, IL


Let Our Customers Tell You How Great We Are

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