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Last Updated: February 25, 2025
According to the Department of Energy, approximately 55% of the energy used in American homes is used for heating and cooling. Since such a significant portion of your utility bill goes toward heating and cooling, you'll want to ensure that the HVAC system in your Oswego home is functioning optimally.
Read our list of the top HVAC companies in Oswego to find the best one for you and your home. Our topic contractors can help you stay comfortable while reducing your bills.

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

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

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

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
Informative resources
Services Offered

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

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

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

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

Our Rating
User Rating
Clear pricing policy
Reliable customer support
Informative resources
Free quotes
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An HVAC system that's malfunctioning or outdated likely needs professional attention for maintenance or replacement. Watch for these signals that your system needs service:
If you notice any of these HVAC red flags, your system evaluated. A local technician can complete an inspection, diagnose problems, and recommend repairing or replacing your HVAC unit.
What you spend on HVAC installation or maintenance varies based on your system type. Common HVAC unit styles include the following:
The amount you spend on HVAC maintenance also depends on the kind of work being done. HVAC systems are complicated and may require different kinds of maintenance. The prices of some common jobs are as follows:
| HVAC Unit Type | Cost | |
|---|---|---|
| Split | $1,933-$4,928 | |
| Hybrid Split | $3,917-$7,216 | |
| Heat Pump | $3,033-$30,903 | |
| Packaged Heating and Air | $254-$423 |
It’s important to take care of HVAC repairs and replacements when they are required, though they can be expensive. The good news is that homeowners have ways to reduce gradual wear and tear and reduce the frequency of breakdowns.
| Service | Cost | |
|---|---|---|
| Filter Replacement | $63-$169 | |
| Condensor Cleaning | $1,269-$3,807 | |
| Thermostat Repair | $85-$211 | |
| Ductwork Cleaning | $406-$1,015 |
It's important to know what makes a good HVAC company. Working with a contractor that's properly licensed and highly experienced will give you confidence that they can fix your system, providing you with effective air conditioning and heating for your home.
Request estimates from at least three HVAC companies. Explain your issues and ask if specialists can inspect your system in person. Review each company's diagnoses, recommended solutions, estimated cost, timelines, and warranties. Avoid contractors that pressure you or demand payment before work.
When hiring an HVAC provider, choose one with technicians that have the right training, licenses, and experience. HVAC contractors in all states must obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is required 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 what kind 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.
Illinois doesn't have state-level contractor licensing requirements. However, there may be local regulations, so make sure to check with your municipal government to confirm that your contractor meets all of the requirements. You can verify an Illinois business license on the Secretary of State's website. You should also look at a company's reviews and complaints on sites such as Yelp, the Better Business Bureau (BBB), and Google Reviews. Pick a company with glowing feedback and good customer testimonials.
Make sure you know the details of any project before it begins. For HVAC repairs, have your provider specify which parts need replacement and why. Confirm that your technician will clean and test the entire system after the repair to ensure that everything works. For replacement, ask the contractor to explain the new HVAC system features, estimated installation time, energy efficiency, model, and brand. Before work begins, you should understand the process your provider will use to properly size the system for your home and the price you'll pay.
Good HVAC companies offer warranties on repairs and installations. The more complete the coverage, the better. Review warranty details between companies and pick the one that offers the best protection for the fairest price.
Get a written estimate before HVAC work begins. A full quote includes both labor and material costs. Make sure you understand and accept all terms before signing the contract.
You should have your HVAC system inspected twice annually. At the time of the inspection, your technician will inform you what services are needed. You should also have your system inspected if you start noticing issues such as leaks, strange noises, or unusual smells. If your system has ductwork, it should be inspected every few years.
Generally, it's a good idea to have your HVAC system inspected in the spring and fall, as these times tend to be less busy. This also helps get your system ready for the summer and winter, when it likely 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. During all seasons, keep your thermostat as close to the outside temperature as you can, and try to adjust it only a few degrees at a time. You might also consider getting a smart thermostat.
Generally, whole-system HVAC installation or replacement takes one to three days. Installing or replacing an air conditioning unit or a furnace can take as little as half a day or as much as two days. The exact amount of time will be based on things like the size of your house, how easily accessible different parts of the system are, and whether your technician runs into any problems.
For a 2,000-square-foot home, you should look for a furnace that's between 50,000 and 80,000 BTUs (British thermal units).
For a 2,000-square-foot home, you'll also want an air conditioning unit with around 2.5 to 5 tons of capacity. In general, if your home is over 1,000 square feet, central air will be more effective than window air conditioning units.
Typically, HVAC financing is provided by a third-party lender. If your HVAC company doesn't offer financing, you might consider taking out your own loan. Be sure to talk to a financial advisor and your HVAC company to learn what options are available to you and appropriate for your situation.
There are several ways you can make your HVAC system more energy-efficient:
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