24 Hour Emergency Service Serving the greater Milford area

Serving the greater Milford area

Onofreo Home Comfort Systems LLC

Onofreo Home Comfort Systems LLC offers extensive heating, air conditioning and indoor air quality services throughout Connecticut including installation, repair and maintenance. Our technicians and installers are factory trained on every product offered. We offer free estimates on new furnace installations, boilers, hot water heater, Air Conditioning systems and other HVAC needs.

Proudly serving the greater Milford area & the entire shoreline from RI to NY!

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Air Conditioning

Indoor Air Quality

Water Heaters

Ductless HVAC

Commercial HVAC


Heat Pumps

New Construction

Home Comfort Experts

At Onofreo Home Comfort Systems LLC, our services are centered around helping people with all of their home comfort needs. We answer the demand for reliable, efficient, and cost-saving year round temperature control as well as a safe, healthy, and enjoyable indoor environment. Our depth of expertise and experience allows us to provide the right option for your unique requirements. From furnaces, boilers, and hybrid heating solutions to air conditioners, heat pumps, ductless units, and water heaters, our skills achieve your goals.

About Our Company

HVAC Installation

Following strict sizing protocols, we develop a professional proposal and obtain the necessary permits for the installation process.

HVAC Repair

Let’s get to the bottom of the issue now, restore equipment to like-new condition and improve the value of your investment.

HVAC System Maintenance

We provide the necessary, proactive maintenance to get the most value and enjoyment out of your HVAC equipment.

Top Quality HVAC System Services

Our NATE-certified team of technicians upholds the strict training, licensing, and protocols of a Bryant Factory Authorized Dealer and Mitsubishi Diamond Dealer. We stay updated with evolving products, procedures, and technologies, bringing you the latest options for more convenient and effective control over heating, cooling, and indoor air quality. Whether for residential or light commercial applications, we customize new designs and replacements and offer free estimates. We explain all products, every stage of the process, and make sure you not only understand what you’re getting but are totally happy with the end result.

Serving the shoreline from RI to NY!

Onofreo Home Comfort Systems LLC includes an in-shop sheet metal shop entirely dedicated to the fabrication of ductwork. Recognizing the importance and impact of the ventilation system, we don’t take chances with inferior quality materials, shoddy workmanship, or poor design. By handling the start-to-finish project, we tailor every aspect to maximize airflow, efficiency, and sustainability. We also avoid needless delays and miscommunication, delivering quick completion and the ideal HVAC system to suit your layout of home or business.

Call our team for your heating & cooling repairs, maintenance & installations!

More and more home and business owners are focusing on the importance of indoor air quality. Onofreo Home Comfort Systems LLC continues 6 years of resolving complaints with overly dry air, excessive humidity, airborne particulate, unpleasant smells and so much more. We’re happy to evaluate the indoor environment, determine the extent of concerns, and create a straightforward strategy for improvement. Specializing in whole-home humidifiers, dehumidifiers, air filters, air purifiers, and a comprehensive range of air quality accessories, we achieve a cleaner, healthier, and more productive living or working space.

(203) 295-4726 Request Service

Additional Loan Options Available Through Energize CT

New A/C and Furnace Replacement

Reviews & Testimonials

Customer satisfaction is our #1 priority

Explore All Reviews

Anthony called prior to the visit. Arrived on time & found a capacitor was bad on our compressor. He went on to check the entire system to make sure it was running right, without me having to ask. Very friendly & explained everything he was doing. Kelly was also very pleasant to deal with on the phone.

Wayne S.

We recently had to replace our central Air Conditioning and received estimate from various HVAC specialists, including the one we currently have a service contract with. Shane, the sales constant, was by far the most professional, patient, kind, honest, and thorough person that I met with.

Christine K.

The installation was installed neatly on the date scheduled and at a terrific price. We are completely happy with the professionally executed work.

Michael L.

Had to change the zoning board, wiring to HVAC and thermostats on an 30 year old system . Responsive, on time arrival, fair pricing – true professionals. Was absolute pleasure to see how their engineer arrived on time, communicated everything he has done, and the work performed. Will definitely contact them again for anything HVAC related.


The technician was very polite. He assessed the situation quickly but thoroughly and provided a honest diagnoses. He told me exactly what was wrong and needed to be done and he performed the job well because everything is working perfectly. I will call them for my future needs and recommend them if you do not have a HVAC provider.

Theandra T.

This company was an absolute joy to deal with helping me switch from oil to gas and taking care of every step of the process, from sales to installation to dealing with gas company. Kelly is a gem. Can not recommend enough!

Terri M.

Anthony, Mark, and Kelly have helped install, fix and maintain our furnace and AC units for many years now — they are the best, and yes, we have tried the rest. But we will always call Onofreo from now on. Excellent work, done fast and reasonable rates — great people too.

John B.

I had Onofreo HCS install a new Hydro-air system last year to replace my 35 year old system that kept giving me trouble – Mark, his office staff, and his techs were prompt, professional, and clean. Mark showed up to do his estimate, I got the proposal signed, they pulled the permit, dropped off a check, and in three days I had a brand new system installed. I knew what was going on every step. The install looks great and they provided free cleaning and tune up service afterward. I have also referred my mom to them and she was thrilled with the service. I would highly recommend anyone who needs maintenance or a new system to Onofreo HCS.

Eric P.

I had an issue with hot water system. They were very fast to send someone out on the same day to diagnose the problem and quickly got in parts the next day to complete the job. Kept me closely updated on when a repair person would come to my place. Very happy I can shower again with hot water!

Monkol L.

In short, I could not be any more pleased and satisfied. You started the process with an excellent presentation, great salesmanship skills, and more than enough knowledge to allay any concerns I had. With your guidance, I believe we put together a system that will continue to meet my needs for years to come. I am particularly impressed with the Rudd heat pump water heater. But for your recommendation, I might have stuck with the standard 50 year old technology and heated water with gas or electric. Now that I have seen the heat pump water heater in action, going with the old technology would have been a big mistake. Thank you.

Scott O.

Bravo to Pat from Onofreo! He walked me through all the service needs for my hot water heater and heating ducts & vents. An overall fantastic experience and I will be calling Onofreo HCS for all future HVAC needs. Thank you 🙂

Carmen F.

Onofreo Home Comfort Systems LLC installed a new ductless, mini-split air conditioning system in our home. Very completive pricing when compared with other area contractors.

Nick N.

Excellent service and quick response. Also had what I thought was a leaking hot water heater but turned out something far less expensive. They responded back quickly and had everything finalized within 2 hours of my initial contact with their office

James V.

Just amazing people even helped me with rebate paperwork from my electric company.Will use them again and so should everyone else.

Ralph S.

Everyone in the office I spoke with was so friendly and responsive. They called to notify me that the technician was running late, so I wasn’t sitting around waiting.
Our Technician, Giovanni, was excellent.

Ellen L.

Onofreo has proven themselves yet again to be the best in the business. My wife and I went to them a second time, this time to replace our Central AC unit. First of all, they came right out to inspect, then they gave us a price that was much lower than I had expected. The install happened very quickly and everything is perfect. Mark and his team are absolutely wonderful and I can’t recommend them highly enough. Truly a first class company all around. If you need work done, this is where you should start. Thank you for another great experience!

Joe B.

Mark and his team are the best. They are honest, transparent, hard working, professional and punctual. They answer all of your questions, even the dumb ones, and I had plenty of those. They removed my antique furnace and installed a complete heating system in 2 days as promised as well as a hot water heater on an emergency basis. They also wear masks. Call them. You won’t be disappointed.

Elaine M.

They were both very professional, informative and very neat and went out of their way to any other issues. I highly recommend them and hope their service lives up to the same.

John T.

Amazing to experience an oil to gas conversion with Onofreo! Efficient, fast, and beautiful work!!

Melissa B.

The install was well planned and started on scheduled date. It required multiple condensers and 4 wall mounted units. The team was friendly, professional and worked non-stop through two very hot days directly in the sun. The install finished ahead of schedule. Cabling is very neat. Team cleaned up when finished. So, start to finish just as promised. The Mitsubishi units work very well and are extremely quiet. An overall A+!

Jeffery B.

Onofreo is an amazing company That is represented by excellent products and professional staff. When I first called them they were extremely responsive to my needs and took care of the initial concerns that I had with an old air conditioning system.

John S.

We just had a ductless split unit system installed in 4 rooms of our house. The people at Onofreo are amazing to work with, from the owner Mark, to the office staff to the guys coming out and doing the work. The install happened much quicker than I anticipated and they were SO clean, I would have never known they were in my house cutting into walls, etc. The system itself is awesome – very quiet and cools down the house super quick. When Tom came for the consult, he told me I’d never want to leave the house again and he was right. Best thing we ever did! Thank you Onofreo!

Heather D.

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