Give us a call now for an immediate match with a local pro.
Click to Call(833) 824-3371(833) 824-3371
Last Updated: February 25, 2025
According to the U.S. Department of Energy, about 55% of energy use in American homes goes toward heating and cooling. In Darien, you're probably looking to reduce your energy expenses and save money on your bills.
Explore our list of the top HVAC companies in Darien to find the best one for you and your home. Our topic contractors can help you reduce your bills while still staying comfortable.

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

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

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

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

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

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

Our Rating
User Rating
Free quotes
Reliable customer support
Services Offered

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

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

Our Rating
User Rating
Informative resources
Free quotes
Reliable customer support
Clear pricing policy
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An HVAC system that's not working properly or outdated likely needs professional attention for maintenance or replacement. Watch for these signs that your system needs service:
These HVAC red flags indicate that you should have your system evaluated. A local provider can complete an inspection, diagnose problems, and recommend repairing or replacing your HVAC unit.
The price of HVAC installation or maintenance will vary depending on the type of unit you have. Common types of HVAC units include the following:
HVAC maintenance prices vary based on the specific services required. HVAC systems can be complicated and potentially require several different services. Costs for typical jobs are as follows:
| HVAC Unit Type | Cost | |
|---|---|---|
| Split | $2,035-$5,189 | |
| Hybrid Split | $4,124-$7,598 | |
| Heat Pump | $3,193-$32,538 | |
| Packaged Heating and Air | $267-$445 |
Repairing or replacing your HVAC system when needed is crucial, but can be expensive. Fortunately, there are actions you can take to minimize wear and tear over time on your system.
| Service | Cost | |
|---|---|---|
| Filter Replacement | $67-$178 | |
| Condensor Cleaning | $1,336-$4,008 | |
| Thermostat Repair | $89-$223 | |
| Ductwork Cleaning | $428-$1,069 |
Knowing what to look for in an HVAC company is important for a successful project. Partnering with an experienced, licensed contractor can offer you peace of mind and ensure your system provides reliable heating and air conditioning for your home.
Request estimates from three or more HVAC providers. Describe your issues and ask if technicians can inspect your system in person. Compare each provider's diagnoses, recommended solutions, estimated cost, warranties, and timeline. Avoid companies that pressure you or demand payment before work.
When selecting an HVAC provider, choose one with technicians that have the right training, licenses, and experience. HVAC contractors in all states need to obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is mandatory for all technicians who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." An individual 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 at the state level.
All individuals in Connecticut who work on HVAC systems are required to be licensed by the Connecticut State Department of Consumer Protection. A worker can be licensed as a journeyperson or a contractor. Both license types have requirements related to education and work experience. You should also check a company's reviews and complaints on sites such as the Better Business Bureau (BBB), Google Reviews, and Yelp. Pick a company with glowing feedback and good customer testimonials.
Always make sure you understand the details of a planned project. When HVAC repairs are required, your provider should list which parts require replacement and why. Confirm that your technician will clean and test your system after repairs are completed to ensure that it’s working properly. When replacing your HVAC, ask your installation company to provide details on the new brand, features, energy efficiency, estimated installation time, and model. Before work begins, make sure you understand how your provider will properly size the new unit for your home and what the cost will be.
Reliable HVAC companies provide warranties for their work. Broader coverage is better, so make sure to compare warranties between providers. Choose the one that gives you the most coverage at a reasonable cost.
Always get quotes for HVAC service in writing before committing to a provider. An itemized quote should cover both materials and labor. Make sure you review all terms before signing a contract.
You should have your HVAC system inspected approximately twice a year. Following an inspection, your technician will tell you what services are required. You should also have your system inspected if you start noticing issues such as leaks, unusual smells, or strange noises. If your home has ductwork, you should have it inspected every few years.
Usually, it's a good idea to schedule inspections in the spring and fall, as technicians tend to be less busy at these times. 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 work it takes for your HVAC system 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 once. You could also consider purchasing 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 takes anywhere from about half a day up to two days. The exact amount of time will vary depending on things like how large your home is, how easily accessible different sections are, and whether your technician finds any problems.
Your HVAC company might have financing options through a third-party lender, or you may be able to obtain a loan on your own. It's a good idea to discuss payment options with your HVAC company and a financial advisor to make sure that you find the best option for you.
There are a number of ways you can make your HVAC system more energy-efficient:
Loading map...