*The Angi rating for Heating And Air Conditioning Service companies in Guilford, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Guilford, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on March 01, 2025
We are a well established business with over 16 years of unmatched expertise. Customer preference and priorities are always first. We are very timely with our work and never lose attention to detail. Renz Heating & Air Conditioning, LLC, has built a reputation for quality work with each satisfied customer. Our sense of pride is apparent in every restoration we complete. Call Renz Heating & Air Conditioning, LLC, today and we will be there in your time of need.
"Perfect Heating installed new furnace, repairs installation of central air! Efficient, responsible, dependable and perfect work and great work Ethics s!"
Carol M on December 2019
We are a well established business with over 16 years of unmatched expertise. Customer preference and priorities are always first. We are very timely with our work and never lose attention to detail. Renz Heating & Air Conditioning, LLC, has built a reputation for quality work with each satisfied customer. Our sense of pride is apparent in every restoration we complete. Call Renz Heating & Air Conditioning, LLC, today and we will be there in your time of need.
"Perfect Heating installed new furnace, repairs installation of central air! Efficient, responsible, dependable and perfect work and great work Ethics s!"
Carol M on December 2019
Airtech Heating and Cooling, LLC, is a New Haven locally owned and operated company that values quality in all aspects of business. The cornerstone of our service is responsiveness with professional quality guaranteed. We have over 40 years experience in the heating and cooling industry. Our services are customized to your individual needs, paying close attention to the details of your project. We look forward to gaining you as another satisfied customer.
"AirTech and Mark Miller responded by calling me almost immediately after my online inquiry to Home Advisor's for service on my gas furnace. It was on December 23rd, Saturday approximately 6pm. He came within the hour and fixed the problem with my furnace. Considering a weekend, after hours and also a holiday weekend at that, extremely reasonable price. I would use them again and I would recommend them highly, as well."
Pat H on January 2024
Airtech Heating and Cooling, LLC, is a New Haven locally owned and operated company that values quality in all aspects of business. The cornerstone of our service is responsiveness with professional quality guaranteed. We have over 40 years experience in the heating and cooling industry. Our services are customized to your individual needs, paying close attention to the details of your project. We look forward to gaining you as another satisfied customer.
"AirTech and Mark Miller responded by calling me almost immediately after my online inquiry to Home Advisor's for service on my gas furnace. It was on December 23rd, Saturday approximately 6pm. He came within the hour and fixed the problem with my furnace. Considering a weekend, after hours and also a holiday weekend at that, extremely reasonable price. I would use them again and I would recommend them highly, as well."
Pat H on January 2024
Here at Scotti Mechanical Services I have over 30 years of HVAC experience in oil heating (NO gas work) and air conditioning. I pride myself on my diligence and attention to detail, and make a dedicated effort to reduce repair/installation cost. There is no job too big or too small that I can't handle in a timely manner, please don't hesitate to call today. I look forward to earning your business. I do provide an after-hours emergency service.
"He didn't do any air side of furnace replaced ignitor we had loud bang noise it was because we needed the furnace to be cleaned and vacuumed I saw pics from real furnace guy it was full of rust and cresol flakes he never vacuumed anything terrible job never fixed problem"
Kenneth B on October 2024
Here at Scotti Mechanical Services I have over 30 years of HVAC experience in oil heating (NO gas work) and air conditioning. I pride myself on my diligence and attention to detail, and make a dedicated effort to reduce repair/installation cost. There is no job too big or too small that I can't handle in a timely manner, please don't hesitate to call today. I look forward to earning your business. I do provide an after-hours emergency service.
"He didn't do any air side of furnace replaced ignitor we had loud bang noise it was because we needed the furnace to be cleaned and vacuumed I saw pics from real furnace guy it was full of rust and cresol flakes he never vacuumed anything terrible job never fixed problem"
Kenneth B on October 2024
Since 1991 AIR, Inc. has been installing heating and Air Conditioning systems for thousands of satisfied clients. Our Ratings and Reviews prove why most people choose AIR, Inc. We offer our services to residential homeowners, if you own a home and need help call us today!
"fast and efficient"
SHERI L B on April 2024
Since 1991 AIR, Inc. has been installing heating and Air Conditioning systems for thousands of satisfied clients. Our Ratings and Reviews prove why most people choose AIR, Inc. We offer our services to residential homeowners, if you own a home and need help call us today!
"fast and efficient"
SHERI L B on April 2024
Onofreo Home Comfort Systems LLC, is your very best option for all your HVAC needs. We always offer the very best pricing, excellent customer service and superior workmanship on every job we do. Call us now!
"work was done on time and right. The price was excellent"
thomas m on June 2024
Onofreo Home Comfort Systems LLC, is your very best option for all your HVAC needs. We always offer the very best pricing, excellent customer service and superior workmanship on every job we do. Call us now!
"work was done on time and right. The price was excellent"
thomas m on June 2024
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Feel free to book online with us today!
"HARP was hired to replace our central AC system with Heat Pumps. The job was never complete, once they rigged the new equipment to get the AC only (no heat) working they scheduled follow up visits which eventually resulted in a no show/no call. After attempting to reschedule further, this is a frustrating process which entails a cycle of waiting on hold only to be transferred to wait on hold again, the work was never completed. It seemed as if none of their techs actually knew how to install this equipment, upon inspection of their work we decided to have it looked at by a 3rd party. Sure enough the equipment was installed incorrectly. At this point we no longer felt safe having further work done by HARP and had another company complete the install. Rather than working with us on the price HARP chose to forge our signature and submit it to the financing company, no invoice was ever received, nor was any warranty paperwork. This experience has been nothing short of a nightmare, I would urge you to choose a different HVAC contractor."
Steve M on July 2024
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Feel free to book online with us today!
"HARP was hired to replace our central AC system with Heat Pumps. The job was never complete, once they rigged the new equipment to get the AC only (no heat) working they scheduled follow up visits which eventually resulted in a no show/no call. After attempting to reschedule further, this is a frustrating process which entails a cycle of waiting on hold only to be transferred to wait on hold again, the work was never completed. It seemed as if none of their techs actually knew how to install this equipment, upon inspection of their work we decided to have it looked at by a 3rd party. Sure enough the equipment was installed incorrectly. At this point we no longer felt safe having further work done by HARP and had another company complete the install. Rather than working with us on the price HARP chose to forge our signature and submit it to the financing company, no invoice was ever received, nor was any warranty paperwork. This experience has been nothing short of a nightmare, I would urge you to choose a different HVAC contractor."
Steve M on July 2024
We are a locally owned company with years of electrical installation and repair service experience. We are fully licensed and insured. Please feel welcome to contact us regarding any of your electrical needs. We take calls 24hrs for emergency services, and even offer free estimates!
"Fast service and good price. I have already referred them to a friend."
Brian C on July 2018
We are a locally owned company with years of electrical installation and repair service experience. We are fully licensed and insured. Please feel welcome to contact us regarding any of your electrical needs. We take calls 24hrs for emergency services, and even offer free estimates!
"Fast service and good price. I have already referred them to a friend."
Brian C on July 2018
M & R Mechanical Services is a leader in providing the absolute best mechanical services by creating a successful alliance with customers through the delivery and execution of our high quality services, solutions and installations. Our goal is to be the company that will meet all of your mechanical needs. Our promise is to build a long lasting partnership through our responsiveness and technical expertise. Customer satisfaction is priority number 1. Through our growth, we hire and train quality employees who will provide the highest level of professionalism and customer satisfaction. As we grow, we will continue to give back to the community.
"Recently, during the cold spell, our boiler began acting up, turning on intermittently with just a little nudge each day. After reaching out to several companies for estimates, we chose M&R to replace our 50-year-old boiler. Tom was the first to arrive to assess the situation and provide an estimate. Once we decided to move forward, M&R was responsive and punctual with their appointments. The team handling the installation consisted of Dex, Jake, Josh, and Tony. They were professional, respectful of our property, and made sure to clean up the area around the boiler. The installation was completed in one day. Tony also stopped by twice to check on the progress and made adjustments to sync up our zones. We are very happy with the work and professionalism of the entire team and are glad to recommend M&R to anyone in need of heating repair or replacement. "
Art T on February 2025
M & R Mechanical Services is a leader in providing the absolute best mechanical services by creating a successful alliance with customers through the delivery and execution of our high quality services, solutions and installations. Our goal is to be the company that will meet all of your mechanical needs. Our promise is to build a long lasting partnership through our responsiveness and technical expertise. Customer satisfaction is priority number 1. Through our growth, we hire and train quality employees who will provide the highest level of professionalism and customer satisfaction. As we grow, we will continue to give back to the community.
"Recently, during the cold spell, our boiler began acting up, turning on intermittently with just a little nudge each day. After reaching out to several companies for estimates, we chose M&R to replace our 50-year-old boiler. Tom was the first to arrive to assess the situation and provide an estimate. Once we decided to move forward, M&R was responsive and punctual with their appointments. The team handling the installation consisted of Dex, Jake, Josh, and Tony. They were professional, respectful of our property, and made sure to clean up the area around the boiler. The installation was completed in one day. Tony also stopped by twice to check on the progress and made adjustments to sync up our zones. We are very happy with the work and professionalism of the entire team and are glad to recommend M&R to anyone in need of heating repair or replacement. "
Art T on February 2025
Thomaston Comfort Control, Inc., brings an unmatched commitment to excellence to your HVAC project. We deliver unsurpassed professionalism, expertise and value. Call today.
"Very responsive to questions all along the project. Brought in installer to pre-check and make sure plan would work. Very respectful of property and very timely completion of project. I recommend this company!"
Michael R on May 2022
Thomaston Comfort Control, Inc., brings an unmatched commitment to excellence to your HVAC project. We deliver unsurpassed professionalism, expertise and value. Call today.
"Very responsive to questions all along the project. Brought in installer to pre-check and make sure plan would work. Very respectful of property and very timely completion of project. I recommend this company!"
Michael R on May 2022
FULL SERVICE HEATING, COOLING, AND ELECTRICAL SERVICES. CERTIFIED COLD WEATHER HEAT PUMP INSTALLER -- REBATES AVAILABLE!! Cawiamca Heating, Cooling and Electrical-- Offers top quality heating & cooling & electrical services. Professional Service and Guaranteed Quality Workmanship. Cawiamca is a trusted, BBB A+ Rated Contractor serving the Connecticut Shoreline since 2014.
"I have used these guys for six or seven projects now and they are amazing. I have used them both for heating and cooling and their electrical services. John and Brian are amazing electricians and more importantly just great and fun to be around people. I would recommend them to literally anyone and I trusted them to work on my parents home. My lifelong contractor told me that they were the best electricians he's ever worked with. I really cannot sing their praises highly enough and if you have any hesitation about them I hope my review is somewhat helpful in allaying them. Their work quality is top notch and they're professionalism cannot be beat."
James p on February 2025
FULL SERVICE HEATING, COOLING, AND ELECTRICAL SERVICES. CERTIFIED COLD WEATHER HEAT PUMP INSTALLER -- REBATES AVAILABLE!! Cawiamca Heating, Cooling and Electrical-- Offers top quality heating & cooling & electrical services. Professional Service and Guaranteed Quality Workmanship. Cawiamca is a trusted, BBB A+ Rated Contractor serving the Connecticut Shoreline since 2014.
"I have used these guys for six or seven projects now and they are amazing. I have used them both for heating and cooling and their electrical services. John and Brian are amazing electricians and more importantly just great and fun to be around people. I would recommend them to literally anyone and I trusted them to work on my parents home. My lifelong contractor told me that they were the best electricians he's ever worked with. I really cannot sing their praises highly enough and if you have any hesitation about them I hope my review is somewhat helpful in allaying them. Their work quality is top notch and they're professionalism cannot be beat."
James p on February 2025
Yes, most states require HVAC technicians to be certified, and for good reason. Hiring an uncertified HVAC pro could lead to poor quality work, costly future expenses, and potential code violations. A certified HVAC technician tackling your home projects protects you as a homeowner.
As you browse our pro listings, take note of the “Angi Certified” badge. Angi Certified businesses meet our standards for certification which include:
The owner, principal, or relevant manager passed a criminal background check
Required to have applicable state and local licenses
Maintain an average star rating of 3.0 or better on our network, if they have at least one review
Paying to advertise their services
Meeting any other eligibility criteria required by Angi
Knowing how long your existing HVAC units can last is essential to determine if you need a repair or replacement. Typically, most modern air conditioning units can last between 15 to 20 years, and most furnaces can work properly for 15 to 30 years. If your HVAC system is on the older side and you decide to replace one unit, it might make sense to replace both simultaneously to save on costs and future hassle.
While different HVAC contractors might offer higher or lower prices than competitors, the best time to replace your HVAC system is when customer demand is low. The beginning of summer and the beginning of winter bring the most demand for HVAC systems, so if you can, consider replacing your HVAC units in the early spring or fall. Many HVAC companies offer special off-season coupons that help lower the overall cost.
The average cost to hire an HVAC contractor is between $50 and $150 per hour if charging hourly. However, some HVAC contractors will charge a flat fee by the type of service they are performing—for example, an inspection can cost between $150 to $500. Keep in mind that emergency repairs—which are made after business hours or around major holidays—generally cost more than scheduled repairs.
The average cost of HVAC repairs is around $350. However, that price can be as low as $100 or as high as $2,000 or more, depending on the repair. For example, replacing a capacitor is a relatively inexpensive repair, ranging from $100 to $500. However, a compressor repair is a more expensive repair, ranging from $750 to $2,000.