I have been very happy with the furnace they installed 3 years ago. In June, I got a new AC unit. KC came out to inspect the old one and told me it would be best to replace rather than repair. As usual, everything was explained to me completely. Josh and Luis did the installation perfectly. Dot came by to do a final inspection. Everyone works as a great team, and I will continue to trust them to do a fantastic job.
Sales & installation process
A major system decision, made manageable.
The replacement process should make the technical details clear without making the homeowner do the engineering.

Seven checkpoints
From first conversation to a proven startup.
Every installation is different, but the decision path should stay organized.
- 01
Discovery
A comfort specialist listens to what is not working, what matters most and what the home has today.
- 02
Home assessment
Equipment, ducts, airflow, electrical or hydronic conditions and installation access are reviewed.
- 03
Options
Good-better-best paths are explained around fit, efficiency, comfort features and investment.
- 04
Preparation
Scope, scheduling, equipment and any related work are coordinated before installation day.
- 05
Installation
Existing equipment is removed carefully and the new system is assembled to the planned scope.
- 06
Commissioning
Controls, airflow, temperature, safety and equipment operation are measured and verified.
- 07
Handoff
The homeowner receives operating guidance, care information and a clear support path.
Before saying yes
Compare the complete installation—not just the equipment label.
- Sizing and load assumptions
- Duct, venting or piping changes
- Controls and accessories
- Removal, permits and site protection
- Startup measurements and homeowner training
- Warranty registration and ongoing service
Verified Google reviews
Twenty installation and replacement experiences
Real feedback from local homeowners who called McHenry Heating & Air.
Work was done professionally. The AC/ Furnace replacement installation was done while I was busy doing my own job which was very convienant. Other than the working unit you would never have known they were there. No scratched up walls from hauling the large units up and down stairs. Nothing went missing. No messes were left behind. And the follow up interview with Dot a few weeks after install was informative and pleasant. You get what you pay for: quality.
We had a great experience with this company. We called during a very hot week when our 22 year old ac unit no longer cooled the house properly. Service technician Jeremy arrived and diagnosed the problem and discussed with us our options. We decided that a new unit was the best plan. The next morning installation technicians arrived. Dot followed up with us assuring our expectations had been met. Customer service with this company is top shelf. We had a new unit cooling our house in less than two business days from our initial service call.
Comfort starts here