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Last Updated: February 25, 2025
If you're like the average American, more than half of your energy bill (55%, per the Department of Energy) goes toward heating and cooling. Since heating and cooling represent such a significant chunk of your utility bills, you'll want to make sure the HVAC system in your Mundelein home is functioning optimally.
Our list of Mundelein's top HVAC companies can help you get your system into top shape, allowing you to save money while staying comfortable.

Our Rating
User Rating
Free quotes
Informative resources
Reliable customer support
Clear pricing policy
Prompt service delivery
Services Offered

Our Rating
User Rating
Free quotes
Clear pricing policy
Prompt service delivery
Informative resources
Reliable customer support
Services Offered

Our Rating
User Rating
Informative resources
Reliable customer support
Clear pricing policy
Free quotes
Services Offered

Our Rating
User Rating
Prompt service delivery
Informative resources
Clear pricing policy
Reliable customer support
Free quotes
Services Offered

Our Rating
User Rating
Free quotes
Reliable customer support
Prompt service delivery
Clear pricing policy
Informative resources
Services Offered

Our Rating
User Rating
Clear pricing policy
Free quotes
Informative resources
Reliable customer support
Prompt service delivery
Services Offered

Our Rating
User Rating
Clear pricing policy
Free quotes
Reliable customer support
Informative resources
Services Offered

Our Rating
User Rating
Informative resources
Free quotes
Reliable customer support
Clear pricing policy
Prompt service delivery
Services Offered

Our Rating
User Rating
Clear pricing policy
Reliable customer support
Services Offered

Our Rating
User Rating
Free quotes
Informative resources
Clear pricing policy
Reliable customer support
Services Offered
Today's Homeowner looks at dozens of datapoints on hvac companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:
An HVAC system that's malfunctioning or outdated likely needs professional attention for repairs or replacement. Watch for these signals that your system needs service:
If you're experiencing any of these HVAC issues, you should have a technician inspect your system. A local professional can diagnose problems and determine whether fixing or replacing your HVAC unit is the correct solution.
What you pay for HVAC installation or maintenance varies based on your system type. Common HVAC unit styles include the following:
HVAC maintenance costs differ depending on what services are needed. HVAC systems are complex and may require different kinds of maintenance. Prices for common services are as follows:
| HVAC Unit Type | Cost | |
|---|---|---|
| Split | $1,973-$5,030 | |
| Hybrid Split | $3,998-$7,366 | |
| Heat Pump | $3,096-$31,544 | |
| Packaged Heating and Air | $259-$432 |
HVAC system repairs and replacements are important, but can be pricey. Fortunately, homeowners can take steps to reduce wear and tear on their HVAC and lower future maintenance needs.
| Service | Cost | |
|---|---|---|
| Filter Replacement | $65-$173 | |
| Condensor Cleaning | $1,295-$3,886 | |
| Thermostat Repair | $86-$216 | |
| Ductwork Cleaning | $414-$1,036 |
Knowing what makes a trustworthy HVAC company is vital for a successful installation or repair. An experienced, credentialed HVAC contractor gives you confidence your system can provide consistent heating and air conditioning year-round.
Request estimates from at least three HVAC companies. Explain your issues and ask if technicians can inspect your system in person. Compare each contractor's diagnoses, recommended solutions, estimated cost, timelines, and warranties. Avoid companies that pressure you or demand payment before work.
When selecting an HVAC company, choose one with technicians that have the appropriate training, licenses, and experience. In all states, HVAC contractors must obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is mandatory for all contractors who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." Contractors must pass an exam (the type of exam depends on the type of equipment they intend to work with) to be certified by the EPA. All other licensing requirements are handled on a state-by-state basis.
The state of Illinois doesn't have state-level licensing requirements for contractors. However, there may be local regulations, so make sure to check with your municipal government to confirm that your contractor meets all the requirements. You can also verify an Illinois business license on the Secretary of State's website. You should also look at reviews and complaints on sites like the Better Business Bureau (BBB), Yelp, and Google Reviews. Pick a company with glowing reviews and testimonials about fantastic customer experiences.
Always make sure you know the details of any project. For HVAC repairs, your provider should specify which parts need replacement and why. Confirm that your technician will clean and test the system after repairs are completed to verify that it’s working properly. When replacing your HVAC, ask the contractor to describe the new model, features, energy efficiency, brand, and estimated installation time. Before work starts, ask how your provider plans to accurately size the unit for your home and how much it will cost.
A trustworthy HVAC company will back its repair services and installations with a warranty. The longer and more comprehensive the warranty coverage, the better. Carefully compare the fine print between contractors and choose the provider that offers the greatest protection at a reasonable price.
Always get HVAC bids in writing before work begins. A thorough quote will cover costs for both materials and labor. Confirm that you agree to all terms before signing the contract.
Normally, your HVAC system should be inspected twice a year. After an inspection, your HVAC technician will tell you what services are required. You should also have an inspection if you start to notice any issues, such as leaks, strange noises, or unusual smells. If you have ductwork in your home, it should be serviced every few years.
The best times of the year to have your HVAC system inspected are the spring and fall. Technicians are generally less busy during these times, making it easier to get an appointment. This also helps get your system ready for the summer and winter, when it typically sees the most use.
You can save energy throughout the year by reducing the amount of power your HVAC system uses to maintain your home's temperature. Always keep your thermostat as close to the outside temperature as possible, and avoid making drastic changes — adjust it only a few degrees at a time. You could also consider a smart thermostat.
Generally, HVAC installation or replacement takes one to three days for the entire system. Installing or replacing a furnace or air conditioning unit may take anywhere from a few hours up to two days. The exact amount of time will vary depending on factors like the size of your house, how easily accessible different parts of the system are, and whether your technician finds any problems.
For a 2,000-square-foot home, you need around 2.5 to 5 tons of air conditioning capacity. If your home is larger than 1,000 square feet, central air will generally be more effective for cooling than window units.
For a 2,000-square-foot home, you'll also look for a furnace that is between 50,000 and 80,000 BTUs (British thermal units).
There are several ways you can make your HVAC system more energy-efficient:
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