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From Maintenance to Middle-of-the-Night Repairs—Everything You Need to Stay Comfortable All Season Long

It’s our mission to help people keep warm and comfortable through the coldest Chicago winters. We offer residential heating installation, repairs and maintenance throughout the northwest Chicago area, including Crystal Lake, Arlington Heights, Elgin, Schaumburg, Aurora, Naperville, Woodstock, McHenry and surrounding communities.

If your heat goes out on a cold winter night or your furnace is making a noise it shouldn’t, we offer 24/7/365 emergency serviceWe have two locations to provide faster service.  We’re here for you.

Heating Maintenance & Repair

When your heating equipment isn’t working properly, the entire system has to work harder. It can even stop working completely. Take advantage of our preventative maintenance services to keep your furnace or boiler humming. We recommend scheduling routine heating maintenance every year in the fall to help ensure your unit is ready for the harsh conditions of winter.



Heating Installations & Upgrades

If you need a new furnace or boiler, our Comfort Specialists work with you to evaluate your current system and provide you with energy-efficient options from trusted brands. Once you've made your selection, our expert HVAC technicians will install your new heating system quickly and efficiently so you can stay warm all winter long.

Heating Systems & Equipment

We offer energy-efficient heating systems and equipment from some of the most well-known and technologically advanced brands, including:

In some instances, you may need additional equipment in order to achieve the desired temperature, humidity and airflow levels in your home:


Experience You Can Trust for Residential Heating Service

Althoff has been taking care of customers in the Greater Chicago area for nearly 60 years.

  • Family owned and operated
  • Licensed, insured and bonded
  • Professionally trained technicians
  • True 24 hour service
  • Live phone operators and staff
  • Employees drive marked vehicles and wear a uniform & ID badge
  • We quote firm prices upfront
  • Free estimates on equipment replacements
  • Quality brands and products you can trust
  • Ongoing training in our state of the art training lab
  • We clean up when we’re done
  • Variety of payment options available
  • 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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