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Carbon Monoxide and Smoke Detectors

Protecting your home and loved ones starts with reliable carbon monoxide and smoke detectors. At Althoff Home Services, we install and replace life-saving detection systems for homeowners in Crystal Lake and the surrounding Chicago suburbs. These devices are your first line of defense against fire and invisible, odorless carbon monoxide leaks that can pose serious health risks. With professional installation, you ensure full coverage and code compliance, something off-the-shelf alarms can’t guarantee.

  • Family owned since 1961
  • We provide quotes before performing service
  • 100% satisfaction guarantee

Our licensed electricians will evaluate your home’s needs and install dependable detectors in all the right places. Don’t leave your family’s safety to chance, schedule your carbon monoxide and smoke detector service today with the trusted experts at Althoff Home Services.

Proudly serving the Crystal Lake area for over 60 years! 

The Dangers of Carbon Monoxide (CO)

Carbon monoxide is a colorless, odorless gas that can be deadly if undetected. At Althoff Home Services, we’ve seen firsthand how essential it is for homeowners to have reliable CO detection throughout the home. CO is produced by many common household appliances, like gas furnaces, water heaters, stoves, and fireplaces, and when ventilation fails or equipment malfunctions, the gas can accumulate quickly. Because it has no smell or warning signs, CO poisoning often strikes without notice, leading to symptoms like headaches, dizziness, confusion, and even death.

That’s why we strongly encourage homeowners in Crystal Lake and the surrounding Chicago suburbs to take this threat seriously. A professionally installed carbon monoxide detector gives your family critical early warning, buying you the time you need to evacuate safely and address the source of the leak. Don’t risk your health with outdated or poorly placed devices. Let Althoff Home Services ensure your home is protected.

Why We Recommend Hard-Wired Professional Installation of CO and Smoke Detectors

Battery-powered detectors are better than nothing, but hard-wired, professionally installed systems offer far greater reliability and coverage. At Althoff Home Services, we specialize in installing interconnected smoke and CO detectors that are powered through your home’s electrical system with battery backup. That means you won’t be left vulnerable when batteries die or when a device is accidentally removed.

Interconnected alarms ensure that if one detector senses danger, every alarm in the home sounds, giving you and your family more time to react. Our licensed electricians install detectors in all the right locations to meet code requirements and provide full protection, including hallways, bedrooms, and basements.

We’ve been family owned since 1961, and we provide quotes before performing service, so there are no surprises. With our 100% satisfaction guarantee, you can trust Althoff Home Services to safeguard your home with professional-grade smoke and carbon monoxide detection systems.

What Are Other Homeowners Saying?

Excellent
Althoff Home Services4.8
Based on 1074 reviews
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
5 days ago
Super responsive, communicative, informative, friendly, competitive and got the job done well. Highly recommended.
Renee Lucas
5 days ago
Great experience the air-conditioning was fixed quickly and Brian did a great job
L
6 days ago
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!!!
Mike Weber
1 week ago
Very efficiently did the maintenance. Couldn’t have asked for more. Very satisfied as usual.
Richard Elke
1 week ago
Scott was very professional. He explained all of our options and costs. He inspected our sub pump.
Renee Diak-Witek
2 weeks ago
Very friendly and knowledgeable about anything I needed to know.
Steve Kolasa
2 weeks ago
Quality service and work !!! Clean and very informative about our AC and Furnace !!! Alex did a fantastic job !!!!
Catherine A
2 weeks ago
Scott was prompt, very pleasant and did a great job!
Gwen
3 weeks ago
Extremely pleased with this company and the employees I dealt with so far.
excellent service - professional and friendly. Andres was the best!
Daniel Bochneak
3 weeks ago
Regular interval preventive maintenance check-ups performed by a Althoff's HVAC professional assures that our HVAC system is safe and functioning with the level of efficiency necessary to maintain our household comfort and safety. We have used Althoff Home Services for several years and have always been extremely satisfied with their services. Our Althoff technician Scott is a trusted expert in his profession. We appreciate his diligence and attention to detail that has meaningfully contributed to our home's comfort & safety.
Jason Schumaker
3 weeks ago
Scott White is fantastic
Jim Andrulis
3 weeks ago
Althoff repairman advised me of a problem with my a/c. He gave me some options for repair and the cost estimates. They even sent another man to offer quotes for a whole system replacement. i appreciated the options with no pressure.
Cathy Wilkins
4 weeks ago
We had our A/C inspection today. Nick A on the Althoff Home Services A/C team arrived and checked everything inside and out. Nick was very courteous, polite, friendly and thorough. We were very pleased with his professionalism. This service is included in our annual membership. The office staff and technicians at Althoff Home Services are the reason we have had them servicing our homes since 2002.
Greg M.
4 weeks ago
Thorough check and clean of Furnace and Humidifier. The contact with the office and the work performed by Justin were both done in a professional manner. Thank you.
April Strong
4 weeks ago
He's friendly and efficient. The perfect combination!
Gary Newland
1 month ago
I appreciate the attention and professionalism. Thank you!
Mandy Bone
1 month ago
Althoff has helped us with our boiler system as well as our AC unit. They have repaired old units we had and even installed new ones when we needed. Everyone we worked with was kind, professional, and knowledgeable about the products.
Had difficult bulbs to replace and find they did it a short period of time and the installation was flawless
David Schaak
2 months ago
Very good and informative worker. You could tell that he enjoyed the work.
Melissa Mikos
2 months ago
Matthew was such a pleasure to work with. He explained everything in layperson terms. Which I appreciated because I was extremely stressed out from the whole issue at hand. He gave me several different options to deal with the water damage and diagnose the source of the problem. of the leak. In conclusion, I would and will go to Altoff for all my future plumbing needs.
Ouzelfalls
2 months ago
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.
Chris Warren
2 months ago
We use Althoff Home Services for almost all of our HVAC, Plumbing, and Electrical needs. Pros: - It is easy to schedule an appointment with them. If you are a member of their White Glove Club, you get priority scheduling. - They spend time explaining the work they perform and any recommendations they have. - Their pricing is transparent. Everything is quoted and sent via email, so you know what you are paying every time they come to your house. - Their employees do not work on commission, so there are no high-pressure sales tactics unlike some of their competitors. Cons: - Some of their services are a little expensive. I would hire a handyman to do things like re-seat a toilet or replace a faucet in lieu of hiring of one of their professional plumbers. - They charge to come out to your house to give pricing estimates, but will deduct this from your bill should you choose to use them. I highly recommend Althoff’s and their team of professional staff!
John Ruder
2 months ago
Always a pleasant experience when Todd comes for the annual inspection of the ROZ Valve. Polite, good conversation, explains what’s being done.
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