Lake in the Hills Furnace, AC & Heat Pump Service
MMDS has been fixing and replacing furnaces, air conditioners, boilers and heat pumps across the Chicago suburbs since 2003. We’re about 3 miles away in Crystal Lake, so we’re close by when you need us. When you call, you talk to the people who do the work, and most Lake in the Hills service calls are seen the same or next day.
Hours: Monday–Friday, 7:30am–5:00pm. Emergencies: we take calls 24/7.
What We See in Lake in the Hills Homes
Lake in the Hills grew fast in the 1990s and 2000s, and many of those homes are still running the furnace and AC the builder put in. A lot of them are now 20 to 25 years old. A few things come up often:
- Oversized original equipment. Builders often installed bigger units than needed. Right-sizing on replacement improves comfort and lowers bills.
- Builder-grade equipment at the end of its life. Many homes here still have the original furnace and AC from when the house was built. At 20+ years, replacement usually beats repeated repairs.
- Hot upstairs, cold basement. Two-story homes often fight uneven temperatures. Sometimes the fix is balancing or zoning, not a bigger system. See our air balancing service.
HVAC Services in Lake in the Hills
- Cold-climate heat pump installation, including dual-fuel setups that use the heat pump most of the year and your furnace below about 35°F
- Furnace and boiler replacement
- Heating repair
- AC installation and replacement and AC repair
- Maintenance plans and tune-ups
- Indoor air quality, thermostats and duct cleaning
Replacement Costs in Lake in the Hills
Every house is different, but here are honest ranges: AC about $4,000–$8,000; heat pump about $6,000–$10,000 before rebates; furnace about $4,000–$10,000 depending on size, efficiency, brand and location. We install Trane, Carrier, Bosch, Midea, LG, Gree and Goodman, and all equipment comes with a 10-year factory parts warranty, with extended labor coverage included or available depending on the package. In our climate, paying extra for anything above about 17 SEER2 rarely pays back.
Rebates and Utilities in Lake in the Hills
Lake in the Hills homes get electricity from ComEd and natural gas from Nicor Gas. ComEd offers instant discounts on qualifying heat pumps, which is why heat pumps have become a realistic option here. See our heat pump page for current ComEd discount details. The federal 25C tax credit for heat pumps and furnaces ended for equipment installed after December 31, 2025, so if someone is still quoting it to you, ask questions.
Maintenance
Our one-time tune-up is $150 and includes a real cleaning of your equipment. An inspection is $79. Maintenance plans start at $15/month and cover an AC visit before cooling season and a furnace visit before heating season.
Lake in the Hills HVAC FAQ
How fast can you get to Lake in the Hills?
Our Crystal Lake location is about 3 miles away. Most service calls are same or next day, and emergencies are answered 24/7.
Are there heat pump rebates in Lake in the Hills?
Yes. ComEd offers instant discounts on qualifying heat pumps, and after the discount a heat pump often costs about the same as a straight AC replacement.
My system is the original from when the house was built. Repair or replace?
If it’s around 20 years old and needs a major repair, replacing it is usually the better value. We’ll show you the numbers and tell you honestly.
Nearby Areas We Serve
We also work in Algonquin, Crystal Lake, Huntley, Cary, Carpentersville, McHenry. See the full service area.
Schedule Service in Lake in the Hills
Book online or contact us and we’ll get you on the schedule.