HVAC Services in Crystal Lake, Illinois
Looking for a reliable HVAC contractor in Crystal Lake? MMDS provides complete heating, cooling, and ventilation services to homeowners and businesses throughout Crystal Lake and McHenry County. From heat pump installations to emergency furnace repairs, we’ve been keeping Chicagoland homes comfortable since 2003.
Our HVAC Services in Crystal Lake
Heat Pump Installation
Cold-climate heat pumps are the smartest upgrade for Crystal Lake homeowners. Modern heat pumps provide both heating and cooling, work efficiently down to -15°F, and qualify for up to $4,000 in federal tax credits and utility rebates.
Furnace Installation & Replacement
Upgrading to a variable speed or 2-stage furnace saves 20-40% on gas bills while eliminating hot and cold spots. We install Carrier, Lennox, Trane, and Daikin.
AC Installation & Repair
Energy-efficient central air conditioning installation and same-day AC repair for Crystal Lake homes.
HVAC Zoning
Two-story home? HVAC zoning gives each area its own thermostat. Systems start at $1,500.
Air Duct Cleaning & Maintenance
Professional duct cleaning and annual maintenance plans for Crystal Lake homes.
Why Crystal Lake Homeowners Choose MMDS
- 20+ years experience in McHenry County
- Licensed & insured Illinois HVAC contractor
- $0 down financing — Sunbit (12-18 mo, no interest)
- All major brands — Carrier, Lennox, Trane, Daikin, Mitsubishi
- Free estimates on all installations
HVAC Costs in Crystal Lake
| Service | Cost Range |
|---|---|
| Heat pump installation | $8,000 – $18,000 (before rebates) |
| Furnace replacement | $3,500 – $12,000 |
| Central AC installation | $4,000 – $10,000 |
| Zoning (2-zone) | $1,500 – $3,000 |
Get a Free HVAC Estimate in Crystal Lake
Call (847) 221-6280 or schedule online for a free estimate. $0 down financing available.