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Avatar for Druziako HVAC Inc
Druziako HVAC Inc
4.7(
157
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+2 more

Serving Harvard, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I recently bought a house and needed a new furnace and I wanted to add central AC to my house. I have a friend who has been a contractor for 20 plus years in the town I moved to. I asked him who he uses, he said he only uses Druziako. I called them up and they came out gave me all my options and advised me on the best way to add duct work etc. They gave me a date they would be there and said it would take 2 days to complete the install. They showed up on time. They finished it in 2 days. Guys were professional and clean. The whole project came out better than I expected. I couldn't be more happy. I would recommend them to anyone. I would also recommend central AC to anyone. It's a nice gift to give yourself :)"
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
23 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for NETR Inc
NETR Inc
4.7(
78
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Harvard, MA and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"I bought my unit from NETR in 2018. It worked fine until we discovered it wasn't blowing any cold air. I made the big mistake of hiring someone a family friend recommended and they diagnosed it incorrectly and then basically disappeared on me. Anyway, it took a few weeks but they repaired it today and I was impressed with their courtesy and getting the job done very quickly and successfully. I felt like I was being dealt with honestly. Thanks, Jared and Jack. I should mention I paid about $300 for the refrigerant today. I don't know what the final cost will be but probably a bit over $1000."
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
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+9

20 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Central A/C - Service or RepairDuctless Mini-split A/C - Install or ReplaceWindow A/C Unit - Service or Relocate+2 more

Serving Harvard, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"I whole heartedly recommend Airco. Their team was experienced, skillful, friendly and professional throughout the duration of this job, from Joe's first visit to my home to discuss air conditioning options to Derek and Cam's final touches on the duct system. I had complete confidence in them, as well as in Steve, Danny, Frank and Patrick. Additionally, Airco's connections to MassSave and Commerce Bank meant financing and payment options to suit my budget. No more hauling loud and heavy window a.c. units up from the basement. Instead, I am enjoying consistent cooling throughout my home with no noise whatsoever. I am a very happy customer!"
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+4

Response time2 days
3 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for New England Quality Air Solutions
New England Quality Air Solutions
4.7(
296
)
Air Ducts & Vents - Clean

Serving Harvard, MA and surrounding areas

Approved

In business since 2005

Free estimates

Offers commercial services

"New England Quality Air Solutions was wonderful! Very professional, may years of experience and hard working. From the very beginning they explained every process step by step and are a very knowledge team. Thank you New England Quality Air Solutions!"
Before Cleaning-Air Ducts
Air Duct - After Cleaning
Before-Air Duct Cleaning
Air Duct Cleaning
Before-Air Duct Cleaning-Commercial

+6

Recommended by98%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,398
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Service or Repair+3 more

Serving Harvard, MA and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"We are overall very happy with the project. Sila had to install a high velocity air conditioning system in very limited space. They provided a timely quote and showed up and did the work professionally and on time. There were a few hiccups, such as the installation of the hatch to the attic space, but Sila’s carpenter agreed to fix the problem at no additional cost to us, so I consider that to be excellent service. After two weeks, the system has been performing exactly as we hoped."
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+6

Response time2 days
Response rate100%
58 neighbors recently requested a quote
Avatar for Atlantic Heating & Air Conditioning
Atlantic Heating & Air Conditioning
4.1(
153
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Harvard, MA and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"I needed to replace an older AC unit that is in a very tight spot in an attic. I had 4-5 people out to look at it and I thought Atlantic (Bill) was by far the most knowledgable and had the best understanding of what I needed, and did the best job explaining it to me. Their pricing was about the same as everyone else so that was the reason I went with them. After we scheduled the install I didn't hear from them until the day before (a Sunday) when I had to reach out to the office. But other than that the installation couldn't have been smoother. Kyle and his team were exactly on time each morning and were very nice and professional and got everything installed smoothly with very minimal need from me. Would definitely recommend."
Response time3 days
Response rate100%
13 neighbors recently requested a quote
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Harvard, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"I wanted to clean a second floor dryer vent hose that was loaded solid with lint. It was worse than I thought! Packed solid! It became evident that this was a messy and dangerous situation as it was a fire hazard. Through Angi I found Everclean and the co. was a perfect fit. HVAC companies don’t do dryer vents. Justin from Everclean was awesome and got the problem straightened out. He even discovered the dryer vent had become disconnected from outside dryer vent door! I can’t fit through the narrow attic hatchway as my shoulders are a bit too wide, so I depended on Justin. Finally, everything is buttoned up, and our clothes now dry in half the time. Cost was moderate and was money well invested. Dryer vent fire danger is now negligible compared to before. Along with neighbor hatred danger. I would hire Everclean again if needed again."
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+2

Response time7 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for JC Duct Cleaning
JC Duct Cleaning
4.9(
28
)
Air Ducts & Vents - Clean

Serving Harvard, MA and surrounding areas

Approved

Super Service Award Winner

Customers say: True professional

"Excellent service; have been dealing with environmental allergies and after seeing what was in our vents I can see why! This company was awesome- honest , efficient, and clean. Would highly recommend"
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Response time12 hrs
Response rate100%
17 neighbors recently requested a quote
Avatar for Emerald HVAC LLC
Emerald HVAC LLC
5.0(
15
)
Central A/C - Service or Repair

Serving Harvard, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"My central AC unit has been broken for several years. intermittently working during hot summers. I've had several HVAC companies come to diagnose and all of them told me different things: replace the whole system, new lines, etc. potentially costing tens of thousands of dollars. So I decided to troubleshoot by myself and pinpointed the issue: the filter dryer needed to be replaced. No company wanted to do this small job. I called Emerald HVAC and told them about my issue, they sent in José, who diagnosed the issue to be what I said. He replaced the filter dryer and the AC unit works perfectly now after several years! In short, Emerald HVAC will be my first choice for any HVAC work in the future. They are honest, professional, and reasonably priced. I recommend them without reservation!"
Response time1 day
Response rate93%
39 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

Yes, having mismatched evaporator and condenser coils in your AC system can lead to serious issues. For instance, it can result in higher monthly energy costs as the system runs longer to compensate for the mismatch. This mismatch can also put extra stress on the system, compromising its efficiency and longevity. 

Along with that, mismatched coils can lead to higher temperatures and humidity levels in the home. What’s more, using coils of different sizes may violate the manufacturer's warranty, as they are designed to work synergistically, and any mismatch could lead to repairs and system failure.

There are ways to detect a refrigerant leak with several different testing methods. However, most homeowners can figure out something’s wrong with their AC unit by noticing these common signs:

  • Ice forming on the evaporator coil

  • Water leaks near the AC unit

  • Frequent hissing sounds

  • Increased electric bills

  • Unit takes longer than usual to cool

  • Unit is blowing hot air

Yes, it’s best to turn off an AC unit that’s blowing hot air to prevent system damage and avoid expensive energy bills. If you let the AC continue running, it will put more strain on the condenser coil and compressor. Plus, if the AC is blowing hot air because of a refrigerant leak, it can also lead to a frozen evaporator coil.

ACs don't run on water. They're not connected to drain pipes or any part of your plumbing system. However, they need refrigerant to run. Refrigerant is a gas or liquid that has a low boiling point and absorbs the heat in your home. ACs need this in order to be functional and cool your home. If you suspect your AC is low on refrigerant, you need to contact a licensed HVAC professional. Refrigerant is a dangerous chemical that requires specialized training and permits to work with. 

If you know how to identify supply and return ducts, you’ll find that only the supply ducts will have dampers. Although your return ducts can have dampers, it’s not common. If you have one return duct that is pulling in too much air, adding a damper to it can help with overall system performance. However, dampers on return ducts are not a necessary addition for most homes.

The Harvard, MA homeowners’ guide to air conditioning services

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