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4.6

(125 reviews)

Top-rated heating and air conditioning pros.

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Local HVAC
4.6(
18
)

Serving Onset, MA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Local HVAC team was very responsive and recommended the right amount of work to modernize my AC system, which had suffered a leak. Other companies were suggesting either doing too little or too much (and charging a ridiculous amount). Everything worked great and the place was cleaned well."
Additional Photos
Additional Photos
Additional Photos
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Response time8 hrs
5 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
165
)

Serving Onset, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"Excellent. 2 perfectionist electricians, Sam and Steve affiliated with Cotti Johnson HVAC & Electrical, completed the comprehensive work with meticulous attention to details in half a day. They are knowledgeable, kind professionals. If I need any electrical work in the future, they are the first to contact in my list."
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
70 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Cotti Johnson HVAC, Inc.
Cotti Johnson HVAC, Inc.
4.3(
63
)

Serving Onset, MA and surrounding areas

Approved

In business since 1944

Free estimates

Emergency services offered

"My electrician from Cotti-Johnson HVAC was a master electrician. If you get him, you are getting the best. I went with the most expensive work package of the 3 that were presented. First off, it was pricey. I knew that going in. I want Cotti-Johnson to understand that I am serious about a working relationship with them. I feel I have done that with their electrical department. Now, if I need their plumbing or HVAC service, our relationship can build off the first experience."
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation

+56

Response time9 hrs
Response rate97%
105 neighbors recently requested a quote
Avatar for RLF Heating & Cooling Inc.
RLF Heating & Cooling Inc.
4.9(
10
)

Serving Onset, MA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Bob did a new mini split install for me and I couldn't be happier with the work. He was professional, timely, and had excellent communication. He was also very knowledgeable and made some great recommendations for the project. I'd recommend him to anyone looking for HVAC work."
Response time6 hrs
Response rate95%
7 neighbors recently requested a quote
Avatar for Majic Air, Inc.
Majic Air, Inc.
4.0(
85
)

Serving Onset, MA and surrounding areas

Approved

In business since 1983

Free estimates

Warranties offered

"Replaced an aging furnace with a high efficiency Trane unit. I was very impressed by the professional workmanship of the "A" team of Brandon and Brian both of whom take obvious pride in their work. I would certainly invite Majic Air and especially this team to handle any future HVAC needs I may require."
Home Show
Home Show
Home Show
Home Show
Home Show

+23

Response time6 hrs
5 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for DaSilva Mechanical
DaSilva Mechanical
5.0(
19
)

Serving Onset, MA and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"I have found Jon to be very professional and responsible. Jon always takes the time whether is maintenance or new A/C installation to ensure you are totally satisfied with the work performed. I cannot say enough about Jon when it comes to maintaining my HVAC equipment."
New air handler
New Furnace
Heat pump in a condo
Old Furnace
High efficiency AC system

+13

Response time11 hrs
2 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for All Phases Mechanical
All Phases Mechanical
4.6(
232
)

Serving Onset, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1982

Free estimates

Emergency services offered

"My experience with all phases mechanical HVAC was great. I was very impressed with Matthewâ  s knowledge and work performed. I would recommend them to anyone needing service. Great job!"
Back side of units in Balle Meade
Balle Meade,Country Club
Oil to Gas Conversion
Ductless Split System
New AC Coil & Custom Duct Work

+5

Response time6 hrs
26 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Westview Electric, LLC
Westview Electric, LLC
5.0(
24
)

Serving Onset, MA and surrounding areas

Approved

In business since 2017

Free estimates

Small jobs welcome

"Replaced a smoke detector and overhead light and installed bathroom ceiling fan/heater. Excellent work for a fair price."
Living room recessed
Living room recessed
Garage Sconces
Deck Lights
Panel replacement

+2

Response time12 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
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Showing 1-10 of 215

FAQs for heating and air conditioning service projects in Onset, MA

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.

Yes, most states require HVAC technicians to be certified, and for good reason. Hiring an unlicensed HVAC technician could lead to poor quality work, costly future expenses, and potential code violations. 

As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved 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

Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.

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.  

The Onset, MA homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.