Independently Rated Highest in Quality
Originally Earned:
February 2017
We declare that Connolly Heating and Air Conditioning HAS QUALIFIED for and continues to meet the Ongoing Research and Rating Requirements for Diamond Certified® status.
Certificate #2428
(925) 269-4614

(L to R) Sean, Jayman, Nick and Alekos prepare to install two package units under a home in Moraga.

Connolly Heating and Air Conditioning cleans air ducts, designs and installs HVAC systems, and provides other services that are designed to improve indoor air quality for residential and commercial clients in Contra Costa and Alameda Counties. The company is also qualified to assess how customers are using energy beyond their HVAC systems and offer various energy-saving solutions, including photovoltaic solar systems.

Owner Norman Grimes says Connolly Heating and Air Conditioning’s highly skilled personnel have been an important aspect of its success. “Our handpicked team of installers, service technicians, and office staffers understands the importance of design and execution. Other companies hire and fire and try to get their team members up to speed to handle the busy times. We have our ‘A’ team and work to maintain the highest possible quality with the best possible established team year after year.”

Connolly Heating and Air Conditioning prioritizes quality control throughout each step of its work, which Mr. Grimes says is important for ensuring the best possible results. “We send a project manager to oversee every job, and when the work is complete, we send the client a survey to get their direct feedback. We go out of our way to take care of our customers and promptly address their concerns.” 

Company Philosophy

“Our customers always come first—we treat them like family, fulfill their needs to the best of our abilities and make sure they have positive experiences throughout their projects. By effectively solving their problems and being honest with them, we’re able to ensure their long-term satisfaction.”

Serving Contra Costa County

Air Duct Cleaning
Indoor Air Quality
HVAC System Installation & Design
Solar Design Energy Assessment

American Standard
American Standard
Carrier Factory Authorized Dealer
Carrier Factory Authorized Dealer

Comparative Summary

Maintaining customer satisfaction is a crucial aspect of any business, but it’s even more important for HVAC contractors that have earned the prestigious Diamond Certified award. For Connolly Heating and Air Conditioning, the easiest ways to keep clients satisfied are to prioritize their needs and make sure they have positive experiences. “At the end of the day, we’re here to...

Frequently Asked Questions

Q: Do you provide emergency services?
A: "Yes, we respond to emergency calls on weekends and holidays. "
Q: How quickly can you be here?
A: "Typically, we’re able to arrive within 24 hours of every call. "
Q: My HVAC unit isn’t running. Does it need to be serviced?
A: "In this situation, we suggest calling us so we can try to solve the problem over the phone and save you the cost of an unnecessary service call. Try checking your breaker box to make sure the problem isn’t merely due to a partial loss...

Industry Info

Dirty ducts won’t just affect your home’s air quality—they may also affect your HVAC system’s energy efficiency.
“By having your air ducts regularly cleaned, you’re helping keep both your home’s air and your HVAC equipment clean, which is very important,” says Norman Grimes, president of Connolly Heating and Air Conditioning in Pacheco...
Findings based on statistically reliable research from 90 surveys

Customer Satisfaction

Survey Question: On a scale of 1 to 10 how satisfied were you with the quality you received?
Chart.

Company Credentials

Workers Compensation
Liability Insurance
License Verification
Business Practices
Current Complaint File

Customer Loyalty

Survey Question: If you needed this product or service in the future, would you use this company again?
Chart.
97%
n = 90

Diamond Certified Qualification

Based on 90 customer surveys, we declare
Connolly Heating and Air Conditioning
has passed all rating steps and has earned
The Diamond Certified Award
No. 2428
Continuously qualified since February 2017.
David Pak
Director of Ratings Research
American Ratings Corporation

Verbatim Survey Responses From Only Verified Customers

Bill M. Verified Customer Name
"I like that they are prompt and flexible. "
Research conducted by American Ratings Corporation. Ratings Methodology

Diamond Certified® Video Profile

Company Capabilities Table

Connolly Heating and Air Conditioning
(925) 269-4614
DCID9252881408

Mon – Fri: 7am – 5pm

Serving Contra Costa County

Norman Grimes, President
46
12
Advanced Home Upgrade Qualified, BPI Certified Building Analyst Professional (Jayman Henry), Carrier Factory Authorized Dealer, Certified Air Duct Cleaning Specialist (Mike Sabo), Home Upgrade Qualified, Mitsubishi Electric Cooling & Heating Training (Norman Grimes), NATE Certified - Air Conditioning Installation (Mr. Grimes), PG&E BayREN Participating Contractor
268327 658796
Liability Insurance, Workers' Compensation
Benicia Chamber of Commerce; Electric & Gas Industries Association (EGIA); Air Conditioning Contractors of America (ACCA)
1992
Air Duct Cleaning, Indoor Air Quality, HVAC System Installation & Design, Solar Design Energy Assessment
American Standard, Carrier Factory Authorized Dealer
Commercial, Residential
Lifetime Warranty on Workmanship, 5-Year Warranty on Labor, Manufacturers’ Warranties on Products
Available via HERO Program

Survey Responses For

Connolly Heating and Air Conditioning

Connolly Heating and Air Conditioning: Average 9.4 out of 10 based on 90 unique customer surveys of customer satisfaction.
Bill M. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I think I would say that they are compassionate, caring, and very understanding."

"I like that they are prompt and flexible. "

Stephen J. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I would recommend anyone to use them. They did great for us. "

"Their services, they were there when they said they would be and dealt with the job we hired them for very well. The quality of the work was also very good. "

Vincent R. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were consistent with their original bidding on the job. They were used as a sub-contractor on a job I was doing. They were good. "

"They are on top of the job and made sure they were prepared to complete the same day. "

Cindy C. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"We were satisfied with the business and their workers."

"We got a new heating system and it is much easier to manage. "

Jane H. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were great, but I have to run. They did an amazing job."

"The workmanship"

Gene S. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Great pricing"

"They are knowledgeable."

Brenda C. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are my neighbors so they are always here if I have any issues. They are super helpful, reliable and knowledgeable. "

"I like the products and services best."

Dylan R. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were so friendly and very thorough. They actually found a pretty big safety issue after we ordered a system and needed it installed. For us being a church safety is number one. They made a very low pressure recommendation for the issues. They were super professional and easy to deal with. I felt like they were consultants rather than contractors. It was a really amazing, not to sound trite."

"From a professional standpoint, I liked the thoroughness they provided before installing. Also I love that they found a huge safety issue we had no clue was there."

Eric W. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are all good guys, I use them for all my HVAC stuff including my business."

"Great pricing, really reliable, honest, and professional"

Bessie J. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They did a great job on our new system. They were professional, on time, and great to work with."

"Their quality on the product and the work"

Anya S. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"We had them install the 3-zone system when we built the home. It has had some issues over the years, but they come out promptly every time and fix the issue. They are very professional and I like that their local."

"I like the products they had available. "

Geoff D. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I had one bad experience in the past with them. I gave them a call on the issue I was having and they improved immensely, huge margin of improvement. Possibly a rough patch with a difficult employee back then, I don't know. They were amazing this time and helped me over the phone, zero cost."

"The guy was very courteous and knowledgeable. He didn't know my exact model of furnace, but he got the job done over the phone nonetheless."

F. C. P. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I had a good experience and it went very well."

"The new furnace is very efficient and a lot more quiet."

O. N. C. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are a pretty good company, a few people in my family have used them, and I feel like we will continue."

"They do what you ask and make recommendations within budgeting."

W. D. R. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I have recommended them many of times with great results for those who have used them. Give them a try."

"They did a great job all around. I'm actually using them right now for some work. They come in and assess the issue or need. Choose the equipment and do swift work."

Castle M. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Nothing comes to mind, they provide the service I have paid them for."

"I have used them for many years."

Hillside C. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:No
Q3 & Q4:

"I have used them many times in the past, but they won't return my phone calls on a new project I needed to start so I found someone else. All other jobs completed were top notch."

"Nothing, I feel that I would be a bias opinion."

T. P. S. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are very respectful and professional."

"Straight arrows"

Tenant F. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are very respectful, professional, always on time, very polite, and super professional. They got my new unit in and it works like a charm, I couldn't have asked for more."

"Mike was the supervisor and he was very direct. There is no beating around the bush with him. He is a straight arrow."

Robert C. Verified Connolly Heating and Air Conditioning Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They are very trustworthy, honest, and dependable."

"Christina, their office manager, was pretty amazing."