10 Best HVAC Companies in Guilford, CT

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Last Updated: February 25, 2025

On average, Americans devote 55% of their home energy usage to heating and cooling, according to the U.S. Department of Energy. Since such a significant portion of your utility bill goes toward heating and cooling, you'll want to make sure the HVAC system in your Guilford home is functioning properly.

A talented HVAC contractor can get your system into shape for a reasonable price, letting you keep your home comfortable while still saving money. That's why we've assembled this guide to the top HVAC companies in Guilford.

Top 10 Best HVAC Companies in Guilford

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Air Specialties Air Conditioning & Heating Inc

Air Specialties Air Conditioning & Heating Inc Logo

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User Rating

25 Spring St, West Haven, CT 06516 (203) 533-4012 airspecialtiesac.com

Clear pricing policy

Prompt service delivery

Free quotes

Informative resources

Reliable customer support

Services Offered

Ductless
Furnace repair
Boiler repair
Boiler installation
Ac repair
Furnace installation
Ventilation
Emergency services
Filtration
Maintenance
Indoor air quality
Ac installation
Inspection

HARP Home Services - Air Conditioning, Plumbing & Heating

HARP Home Services - Air Conditioning, Plumbing & Heating Logo

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User Rating

863 Marshall Phelps Rd, Windsor, CT 06095 (860) 935-8995 harpcanhelpyou.com

Clear pricing policy

Reliable customer support

Informative resources

Prompt service delivery

Free quotes

Services Offered

Boiler repair
Inspection
Filtration
Indoor air quality
Furnace installation
Ductless
Smart home integration
Ac installation
Ac repair
Furnace repair
Boiler installation
Emergency services

M&R Mechanical Services

M&R Mechanical Services Logo

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User Rating

1050 Bridgeport Ave F3, Milford, CT 06460 (203) 951-5207 mandrmechanical.com

Clear pricing policy

Reliable customer support

Free quotes

Informative resources

Services Offered

Ductless
Boiler installation
Duct cleaning
Furnace installation
Furnace repair
Maintenance
Ac repair
Emergency services
Indoor air quality
Filtration
Ventilation
Boiler repair
Ac installation

Aire Serv of Shelton

Aire Serv of Shelton Logo

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User Rating

41 Clifton Ave, Ansonia, CT 06401 (203) 717-9527 aireserv.com

Prompt service delivery

Clear pricing policy

Reliable customer support

Informative resources

Free quotes

Services Offered

Ac repair
Filtration
Duct cleaning
Furnace repair
Ac installation
Boiler repair
Inspection
Boiler installation
Furnace installation
Indoor air quality
Maintenance
Emergency services

Dynamic Mechanical

Dynamic Mechanical Logo

Our Rating

User Rating

230 S Washington St Unit #26, Plainville, CT 06062 (860) 864-4327 dynamichvac.net

Informative resources

Clear pricing policy

Free quotes

Services Offered

Ventilation
Emergency services
Indoor air quality
Ac installation
Furnace repair
Duct cleaning
Boiler repair
Boiler installation
Maintenance
Furnace installation
Ac repair
Ductless
Radiant heating
Inspection

Duncklee Cooling & Heating Inc

Duncklee Cooling & Heating Inc Logo

Our Rating

User Rating

296 Taugwonk Rd, Stonington, CT 06378 (860) 535-2552 dunckleeinc.com

Reliable customer support

Prompt service delivery

Informative resources

Clear pricing policy

Free quotes

Services Offered

Ac installation
Ductless
Boiler installation
Ac repair
Ventilation
Maintenance
Indoor air quality
Furnace installation
Emergency services
Zoning systems

Link Mechanical Services, Inc.

Link Mechanical Services, Inc. Logo

Our Rating

User Rating

60 Production Ct, New Britain, CT 06051 (959) 600-6345 justcalllink.com

Prompt service delivery

Informative resources

Free quotes

Clear pricing policy

Services Offered

Radiant heating
Boiler repair
Maintenance
Ductless
Ac repair
Boiler installation
Indoor air quality
Inspection
Ac installation
Furnace repair
Furnace installation
Zoning systems
Filtration

Onofreo Home Comfort Systems LLC

Onofreo Home Comfort Systems LLC Logo

Our Rating

User Rating

280 Quarry Rd, Milford, CT 06460 (203) 793-6811 onofreohomecomfort.com

Prompt service delivery

Reliable customer support

Clear pricing policy

Free quotes

Services Offered

Emergency services
Ac installation
Ventilation
Boiler installation
Furnace installation
Indoor air quality
Maintenance
Filtration
Inspection
Ac repair
Ductless

Degree Heating and Cooling

Degree Heating and Cooling Logo

Our Rating

User Rating

160 Oak St #508, Glastonbury, CT 06033 (860) 266-5957 degreeheatingandcooling.com

Clear pricing policy

Reliable customer support

Free quotes

Prompt service delivery

Services Offered

Maintenance
Ac repair
Boiler installation
Filtration
Boiler repair
Furnace repair
Emergency services
Furnace installation
Ac installation
Ductless
Indoor air quality

JP DUNN HEATING & COOLING, LLC

JP DUNN HEATING & COOLING, LLC Logo

Our Rating

User Rating

701 Northfield Rd, Northfield, CT 06778 (860) 283-1167 jpdunnhvac.com

Clear pricing policy

Free quotes

Reliable customer support

Services Offered

Emergency services
Maintenance
Ac installation
Ductless
Boiler installation
Ac repair
Boiler repair
Furnace repair
Indoor air quality
Ventilation
Filtration
Furnace installation
Today's Homeowner Ranking Methodology

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:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

Signs You May Need HVAC Repair or Replacement

If your home's HVAC system isn't working correctly or suffering from a lot of wear and tear, you might need an HVAC contractor for maintenance or replacement. Watch for these common indicators that your system needs expert attention:

  • Frequent breakdowns and need for repairs
  • Cracking, corrosion, or rust
  • Strange noises when the system turns on
  • Thermostat malfunctions or temperature control issues
  • Unusually high energy bills
  • Poor air circulation or uneven heating/cooling
  • Refrigerant leaks
  • An HVAC system that's over 15 years old

If you're experiencing any of these HVAC issues, have a technician inspect your system. A local professional can identify problems and let you know whether whether fixing or replacing your HVAC unit is the best solution.

Cost of HVAC Installation and Maintenance in Guilford

Your HVAC installation or maintenance cost varies depending on the style of unit. Common HVAC unit varieties include the following:

  • Split or mini-split: If your home's ductwork can't accommodate a central HVAC system, you probably have a split or mini-split system. Split systems have internal units in each room to regulate temperature; these indoor units all connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC unit operates similarly to a regular split system. It provides flexibility by providing the option to draw on either electricity or gas for energy.
  • Heat pump: Heat pumps exchange warm and cool air between your home and the outdoors. They don't generate their own heating and cooling, so they work best in more temperate climates.
  • Packaged heating and air: Packaged HVAC systems work best in smaller houses. They consist of a single combined air conditioner and heating unit, usually located in an attic or basement. This unit is typically small, cost-effective, and straightforward to maintain.

HVAC maintenance prices vary depending on what services are needed. HVAC systems are complicated and can require different maintenance services. Prices for common services are as follows:

HVAC Unit TypeCost
Split$1,930-$4,921
Hybrid Split$3,911-$7,206
Heat Pump$3,029-$30,860
Packaged Heating and Air$253-$422

Ways to Save Money on HVAC Costs

It's important to repair or replace your HVAC system when it's broken, but it can also be expensive. Thankfully, there are steps you can take to slow the wear and tear on your HVAC.

  • Change filters regularly. Replacing your air filters or washing them every 30–90 days allows effective air circulation through your system. Also try to keep debris from accumulating on the outdoor sections of your HVAC.
  • Change the position of your blinds seasonally. Closing your blinds in the summer blocks some passive solar heat from getting indoors. Opening the blinds in the winter allows this same heat to help warm your home. Both of these measures help decrease the work required from your HVAC system.
  • Keep your system clean. Keeping your ductwork, grills, condenser fan blades, and indoor evaporator coil clean helps your HVAC system function effectively and lowers the risk of mold. The National Air Duct Cleaners Association suggests cleaning your HVAC system when you notice things starting to get dirty.
  • Monitor for potential problems. Monitor your system for issues, for example by consistently checking your thermostat and energy bills. This enables you to address issues before they get out of hand.
ServiceCost
Filter Replacement$63-$169
Condensor Cleaning$1,267-$3,801
Thermostat Repair$84-$211
Ductwork Cleaning$405-$1,014

How To Choose a Local HVAC Company

Knowing what to look for in an HVAC company is important for a successful project. Look for an experienced, licensed contractor that can offer you peace of mind and make sure your system provides reliable air conditioning and heating for your home.

Compare Multiple Bids

Get quotes from three or more HVAC contractors. Explain your issues and ask if specialists can inspect your system in person. Compare each contractor's diagnoses, recommended solutions, estimated cost, warranties, and timeline. Avoid providers that pressure you or demand payment before work.

Check Credentials

Look for an HVAC company that employs skilled technicians who have the necessary training and licenses. HVAC contractors in all states must obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is required for any individual who helps "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 by the state.

All individuals who work on HVAC systems in Connecticut need to be licensed by the Connecticut State Department of Consumer Protection. An individual can be licensed as a journeyperson or a contractor. Both license types have requirements related to education and work experience. Checking reviews on Google Reviews, the Better Business Bureau (BBB), Yelp, and similar sites can aid your decision as well. Choose a provider with great reviews and reports of positive customer experiences.

Understand Work Details

Always make sure you know the details of any project. When HVAC repairs are required, your provider should detail which parts require replacement and why. Confirm that your technician will clean and test your system after repairs are completed to verify that it’s working properly. When replacing your HVAC, have the provider describe the new model, energy efficiency, features, brand, and estimated installation time. Before signing a contract, ask how your provider plans to accurately size the unit for your home and how much it will cost.

Compare Warranties

Reputable HVAC companies back their services with warranties. Compare warranties from different companies, while remembering that broader coverage is better. Look for the provider that offers the most coverage for a reasonable price.

Get Quote in Writing

Get written estimates before starting any HVAC work. The quote should outline costs for both materials and labor. Read all terms carefully before signing.

Frequently Asked Questions About HVAC in Guilford, CT

Typically, you should have your HVAC system inspected twice a year. After an inspection, your HVAC technician will tell you what, if any, services are required. You should also have your system inspected and serviced if you start to notice any issues, like strange noises, leaks, or unusual smells. If your home has ductwork, 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, which makes it easier to get an appointment. This also ensures that your system is 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 work it takes for your HVAC system to maintain the temperature of your home. Always keep your thermostat as close to the outside temperature as you can, and try to adjust it only a few degrees at once. You may also consider getting a smart thermostat.

Generally, whole-system HVAC installation or replacement takes between one and three days. 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 be based on things like how large your home is, how easily accessible different sections are, and whether your technician discovers any problems.

For a 2,000-square-foot home, you should look for around 2.5 to 5 tons of air conditioning capacity. If your home is larger than 1,000 square feet, central air will 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:

  • Keep ductwork clean, and clean or change your air filters regularly.
  • Schedule regular inspections to take care of problems as they arise.
  • Keep your attic well-ventilated and make sure all doors and windows are well-sealed.
  • Install a smart thermostat. If you don't want to or can't buy one, try to keep the temperature indoors as close to the outside temperature as is comfortable.
  • When you need to replace part of your system, explore Energy Star-certified or similar environmentally friendly options.

Other Guilford, CT Home Services

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