HVAC & Plumbing Experts | Althoff Home Service's Affiliations

Since 1961, Althoff Home Services has built a reputation grounded in craftsmanship, honesty, and local community trust. We are proud to be recognized by both our neighbors and top industry manufacturers across Crystal Lake, Hillside, and the Surrounding Chicago Suburbs.

Our Awards & Affiliations

Our awards and certifications reflect our ongoing commitment to delivering expert heating, cooling, plumbing, and electrical care to every home we enter.

Community & Reader Choice Awards

5x Northwest Herald “Best of the Fox” Reader’s Choice Winner (Including 2026): Voted by local residents year after year as a premier home service provider representing McHenry County.

McHenry County Top Workplaces: Recognized as a leading local employer in the Northwest Herald Readers’ Choice Awards, proving our commitment to maintaining a team of top-tier, happy professionals.

Nextdoor Neighborhood Favorite: Recommended directly by local homeowners on Nextdoor who trust us to take care of their friends, family, and neighbors.

Industry Certifications & Brand Partnerships

NATE (North American Technician Excellence) Certified: Our technicians hold NATE certification, the gold standard in HVAC technical competency, ensuring your equipment is serviced safely and correctly.

Trane Comfort Specialist: Recognized as an elite dealer demonstrating superior technical expertise, ongoing training, and highest customer satisfaction when installing and servicing Trane equipment.

Authorized Amana Heating & Air Conditioning Dealer: Partnered with Amana to offer industry-leading heating and cooling equipment backed by robust manufacturer warranties and precise installation.

Experience Award-Winning Service for Your Home

When you choose Althoff Home Services, you are choosing over 60 years of family-owned dedication, upfront quotes, and a 100% satisfaction guarantee.

Give our team a call today at (815) 201-5676 to schedule your service!

Community & Reader’s Choice Awards

McHenry County Top Workplaces Reader's Choice 2024

Industry Certifications & Brand Partners

Amana Heating and Air Conditioning Dealer

What Are Other Homeowners Saying?

Excellent

Althoff Home Services4.8

Based on 1096 reviews

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Bob Rozycki

2 days ago

Yesterday we had our furnace, air conditioning unit, air filter system and whole house humidifier replaced. Alex Florita and Wiktor Kruzel were the two technicians who removed the old equipment and installed the new products. To say the installation was flawless, incredibly clean and perfectly done would be a gross understatement. These craftsmen did a fantastic job, were very careful in our home and answered all of our questions completely. We , as usual with Althoff, were totally satisfied. Today, Jesse Hernandez from Althoff came to us to replace our water heater. He was incredible. He was friendly, professional, and went way beyond my expectations. He answered every one of our questions, provided us with advice on how to best use the equipment and did an outstanding installation of our new tankless water heater. We have been customers of Althoff Home Services for over thirty years Over that time we have worked with many technicians and staff members to address our needs. I can say, without reservation, that all of these people met or exceeded our expectations. Jesse, Alex and Wiktor FAR exceeded those expectations. Jesse is an incredible technician. And what a truly nice person. Totally outstanding in every way. Bob and Sharon Rozycki

Gary Downing

3 days ago

I had a plumbing issue. I called and they had sent Mat out in a few hours and he fixed it was thorough and explained the cost to me and what he was doing. I would recommend this place to anyone needing plumbing service.

Karen Pieroni

4 days ago

I've never had such good service as Althoff brings. Exceeds my expectations every visit.

Donna Borman

7 days ago

We have been using Althoff Home Services for ALL of our plumbing, HVAC and electrical needs for many years now (after 2 bad experiences with another company). Althoff is a family owned & operated company and it shows in their professionalism, kind and courteous approach and the steps they take to make sure we feel like our job is their only priority. Their pricing is fair, work is thorough and absolute top-quality! Highly recommend!

Ginda Owens

2 weeks ago

Seasonal maintenance on boiler and hydroponic heating system was done, and water heater was checked and flushed. Excellent service. Thank you Brian!

Stash Stanton

On time arrival for a new Trane furnace installation. Technicians were polite, friendly and did an expedient professional installation. Cleaned up before they left. I was impressed as expected with Althoff Ind. installers. Thank you for a job well done!

Lyn Cablk

1 month ago

Altoff's service is always excellent. We've never been disappointed and our history with them goes back 28 years, ever since we moved to this community!

tiffany foreman

Mark was friendly, professional and thorough. He did a great job fixing and cleaning my AC unit. He took time to look everything over and made recommendations for services in the future. I appreciated his advice and attention to detail. I would definitely recommend him!

John Cadwell

AC tune-up - very thorough.

Ouzelfalls

I recently switched to Altoff Services to do my annual A/C and Heater maintenance. They came this week to do the A/C. they did a thorough job in testing my A/C's cooling efficiency. they tested refrigerant levels.They removed the outside unit's shroud and thoroughly cleaned the unit. This was the first time anyone did that. I was very happy with the work they did.

Lois

I was out of the state when my son texted about the water leak in the basement. Althoff responded promptly and resolved the issue. So happy with the service they provide!

Laura Frayn

My A/C stopped working due to an unusual problem. Edwin used excellent analytical skills to find the solution. He was professional, thorough, and an excellent communicator. I highly recommend Edwin and Althoff

Greg Vachon

We had new a/c compressor and attic fan unit installed in the spring. Team was efficient and did a great job. Completed just as stated. Electricity bill went from above average for neighbors to below average according to ComEd report. It has been a lot of savings (plus house is cool - old one wasn't working well). Technicians have been wonderful in ensuring working just right (Ryan Staral, thanks! ... Brian Pulaski, thanks!). The staff calling us for our maintenance check (free with install) were so polite and accommodating. Really stellar service!

Mark Palmer

Jon at Althoff was a lifesaver. Had a leak that several other companies were unable to fix. Jon had a great attitude and resolved my problem quickly. I will be using Althoff in the future.

Mark Paszkiet

2 months ago

HVAC check-up

Jackie Dugger

Erik was quick, kind, and clean. Excellent service as part of my regular AC maintenance plan.

Virgil Marsmaker III

Althoff just finished the second job at our home this year. They do everything at the highest possible level. Great workmanship with great attitudes. Would recommend!!

Janet

Brian was our tech at my dad's place. He did an HVAC checkup. My 99 yr old dad wanted to go to the basement with Brian so she could see what Brian recommended. He took the time to explain everything to dad, which I thought was so nice, given the fact it took dad awhile to get down the stairs! Great service.

Randy Malin

Jim our tech was amazing Explained everything so we understood everything he was doing Very professional and knowledgeable! Thank you Jim

Jim Marks

3 months ago

Very good explanation of what needs more immediate attention if anything, or what could wait.

Becki Parsons

Todd was very nice and knew what he was talking about. Suggested things we can do. He was very pleasant to talk to and we would love to request him every time we to service our home. 5 stars and more!!!!

Steve S.

Would highly recommend Althoff for your electrical needs. Our tech. Scott was friendly, efficient and professional. He explained exactly what he was doing and the need for safety repairs to our electrical panel. Great job!!

Susan Richardson

I had a very nice young man for my technician. He checked and cleaned everything and told me all was well. Of course that made me happy. The technician was here to clean and check my heating system for the winter

Fred Ichinose

Super responsive, communicative, informative, friendly, competitive and got the job done well. Highly recommended.

We are so pleased with the work Victor and Braden did-- professional, friendly, fast, and with great explanations. We could not be happier with their work, as we always are with your company's work. The Daikin unit is working perfectly, keeping our open concept kitchen, family room, music room, and dining room a uniform, warm temperature. THANKS!!!

Affiliations

Our Awards & Affiliations

Community & Reader Choice Awards

Industry Certifications & Brand Partnerships

Experience Award-Winning Service for Your Home

Community & Reader’s Choice Awards

Industry Certifications & Brand Partners

Any Problem?
We're Here to Help!

What Are Other Homeowners Saying?

Proudly Serving the Northwest & Western Suburbs

Let’s get your project
started today!

Log In to Your Customer Portal - quick access to your service history

Our Office

Office Hours

Affiliations

Our Awards & Affiliations

Community & Reader Choice Awards

Industry Certifications & Brand Partnerships

Experience Award-Winning Service for Your Home

Community & Reader’s Choice Awards

Industry Certifications & Brand Partners

Any Problem? We're Here to Help!

Featured Promotion

What Are Other Homeowners Saying?

Proudly Serving the Northwest & Western Suburbs

Let’s get your project started today!

Log In to Your Customer Portal - quick access to your service history

Our Office

Office Hours

Any Problem?
We're Here to Help!

Let’s get your project
started today!