SumZero Energy Systems, LLC

4.92 |11 Verified Ratings

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View Service Area

SumZero Energy Systems, LLC

4.92 | 11 Verified Ratings

Write a Review

View Service Area

508-965-0046

84 October Hill Rd
Holliston, MA 01746

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Profile

SumZero Energy Systems, LLC

Home Energy Improvement Experts

We are 'Home Energy Improvement Experts' focused on lowering the carbon footprint, while improving comfort, efficiency, and indoor air quality. The services we offer are HVAC design and installation, spray foam insulation, and energy auditing services. Our goal is to educate and provide solutions, based on building science principals, to homeowners and building professionals interested in any home improvement, remodel, or new construction project.

Achievements

Learn how HomeAdvisor screens and approves their pros.

Service Area

Newton
Cambridge
Framingham
Waltham
Brookline
Watertown
Arlington
Wellesley
Southborough
Dedham
Lexington
Needham
Shrewsbury
Westborough
Woodville
Hudson
Marlborough
Arlington Heights
Blackstone
Hopedale
Franklin
Canton
Upton
Millville
Holliston
Wayland
Waban
Hopkinton
Lincoln
Milton
Natick
Medfield
Wellesley Hills
Nonantum
Bellingham
Wrentham
Ashland
Sharon
Dover
Medway
South Walpole
Sherborn
Maynard
Norfolk
Millis
Westwood
Weston
Milford
West Newton
Boston
West Roxbury
Fayville
Newton Highlands
Grafton
Auburndale
Norwood
Northborough
North Grafton
Newton Lower Falls
Sudbury
Mendon
Newton Upper Falls
South Grafton
Babson Park
East Walpole
Belmont
Chestnut Hill
Newton Center
Brookline Village
Needham Heights
See All >

Services Offered

Air Conditioning

Central A/C Install
Ductless Mini-split A/C Install

Heating & Furnace Systems

Heat Pump Install
Ductless Mini-split Heating - Install or Replace

Website

http://www.sumzeroenergysystems.com

Areas of Expertise

Air Conditioning & Heat Pump design & installation
Mini Split design & installation
Fresh Air Ventilation
Building Science

Product Brands Used

Mitsubishi
Bosch Thermotechnology

Quick Facts

Business Hours

Monday:

8:00 AM to 5:00 PM

Tuesday:

8:00 AM to 5:00 PM

Wednesday:

8:00 AM to 5:00 PM

Thursday:

8:00 AM to 5:00 PM

Friday:

8:00 AM to 5:00 PM

(Please call to confirm)

Free Estimates
Credit Cards Accepted
Bilingual

Credentials

In Business Since: 2009

Memberships & Affiliations

Building Performance Institute (BPI) Certified Professional

State Licensing

Trade: Home Improvement Contractor

License #: 195250

Expiration: 04-16-2023

Screening

HomeAdvisor Screened. View Details

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information or representations set forth in those profiles, as they are self-reported by the Service Professional.

HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.

To find more licensing information for your state, visit our Licensing Requirements page.

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Photos

SumZero Energy Systems, LLC

My Work

1 Projects

Mitsubishi
5 photos

87760655

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Ratings & Reviews

SumZero Energy Systems, LLC

Real feedback from real homeowners.
Learn more about this pro by reading the ratings and reviews below.

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5.0 | 05-24-2022

Review by: Ada C. in North Brookfield, MA

Project: Repair or Service a Central Air Conditioning System

Daniel Oliveira & Dan from SumZero Energy Systems arrived promptly, were knowledgeable and courteous. Upon explaining the issue with my AC fan, they immediately understood the problem and addressed it. They exceeded my expectations, explaining what went wrong and how to avoid this issue in the future. Even the initial telephone contact, setting up the appointment, communication, and addressing our specific needs were excellent. I highly recommend SumZero Energy Systems for all your HVAC needs.

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5.0 | 05-17-2022

Review by: Nee B. in Westborough, MA

Project: Install or Replace a Ductless Mini-split Air Conditioning System

Had a good experience. Communication was good - they patiently answered all our questions and even helped us with availing the MassSave rebate. The work was done in a day and they did a great job at it.

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5.0 | 05-31-2021

Review by: David M. in Medford, MA

Project: Install a Central Air Conditioning System

Very clean, efficient workers. Answered all questions and were very pleasant to work with

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5.0 | 05-25-2021

Review by: George G. in Worcester, MA

Project: Install or Replace a Ductless Mini-split Air Conditioning System

Dave Sampaio and the team were very reliable regarding project scheduling and execution. Efficient, clean, polite they were satisfying all my requests regarding particularities of the job. I am pleased to recommend SumZero to anybody that wants to hire them.

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5.0 | 04-21-2021

Review by: Olga F. in Newton Highlands, MA

Project: Install a Central Air Conditioning System

David Sampaio from SumZero was one of six contractors we interviewed for central AC replacement. David was very helpful in our decision making process when we were deciding between AC and heat pump units. His price was very reasonable too. We chose the heat pump in the end and are very happy with the choice. David’s team was very polite and professional during installation, they did an excellent job setting everything up and cleaning the area. High five, David! Thank you!

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5.0 | 02-14-2021

Review by: Grace M. in Medway, MA

Project: Install a Central Air Conditioning System

This company is professional in every way. From David coming over my house to give me the estimate, to the people working, they were so polite. David is so pleasant, he talked to me about everything that would happen the day of the installation, and he was true to his word in every way... Plus His price was the best by far compare to the other companies appraisal. My recommendation? Go with SumZero. You'll be 100% satisfied!! Thank You David and company for the perfect work and price. I could not be happier! Grace Macaluso.

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5.0 | 01-12-2021

Review by: Dorothy H. in Natick, MA

Project: Install a Central Air Conditioning System

They are a professional; respectable, and knowledgeable crew. I'm very impressed by their commitment to do a good job. I would hire them again if needed.

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5.0 | 12-21-2019

Review by: Michael M. in Ashland, MA

Project: Install a Central Air Conditioning System

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5.0 | 09-09-2019

Review by: Colleen C. in Jamaica Plain, MA

Project: Install a Central Air Conditioning System

SumZero Energy Systems have been excellent in the last several months with supporting the replacement of my air conditioning system in my old condo as well as servicing my furnace. A price comparison with other local companies also prooved SumZero Energy Systems offered the best price. When I purchased a home a few months later, I called them to take a look at my air conditioning system and furnace because I felt as though they had provided such excellent service in the past. It was a no-brainer to ask for consultation regarding the heating and cooling systems in my new home! When I contacted them for assistance or consultation, they are usually quick to respond and provide appointment times had a very convenient window! They have shown up on time to all of the appointments I have had. David S. has always taken the time to explain everything thoroughly and answer all my questions. I highly recommend SumZero Energy Systems!

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5.0 | 08-05-2019

Review by: Elizabeth K. in Roslindale, MA

Project: Install a Central Air Conditioning System

The A/C that was installed was actually a ductless A/C from Mitsubishi . It has the ability to heat as well. My experience with SumZero and Ilija and his crew was top notch. They were wonderful to work with. Professional, polite and very efficient. I d definitely use them again and have recommended them to numberous people.

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4.92

11 Verified Ratings

HomeAdvisor's Screening Process

HomeAdvisor uses an extensive screening process to screen businesses and business owners/principals. We perform this screening when a business applies to join our network and, if the business is accepted, whenever concerns are brought to our attention. If you have concerns that a pro in our network doesn't meet these standards, please contact us to investigate. We're committed to maintaining a network of trusted home service businesses, and those who don't meet our criteria will be rejected or promptly removed from our network.

Criminal Background Check

Who does HomeAdvisor background check?

The owner or principal of each business in HomeAdvisor's network (with the exception of Corporate Accounts) must pass a background check. Unfortunately, we cannot perform a background check on every employee of a business—the background checks are performed only on the owner or principal. As always, we recommend that you conduct your own research on the businesses you hire, including making inquiries directly with the businesses regarding their employee background check policies.

What does the background check cover?

We use a third-party vendor to conduct a criminal records search in the state in which the business owner or principal works. Our third-party vendor uses a national criminal database ("NCD") to screen service professionals. Businesses will not be admitted to the network if their owners or principals have the following felonies in their available criminal records*:

Arson

Assault/domestic violence/battery

Child abuse

Intimidation/terrorist threats

Kidnapping/abduction

Lewd and lascivious behavior

Manslaughter/murder/homicide/vehicular homicide

Rape/incest

Robbery/carjacking

Sex offenses

Other felonies not listed above that occurred in the past seven years

Contracting without a license in the past seven years

Our background check does not exclude service professionals unless the crime at issue is a felony.

*The comprehensiveness of the NCD varies by state. Please be aware that the reporting in the NCD is particularly limited in the following states: AL, CO, DE, GA, ID, IL, KS, LA, ME, MA, MI, MS, MT, NE, NV, NH, NM, SD, UT, VA, VT, and WY. After initial admission to the HomeAdvisor network, businesses are re-screened biennially.

How is COVID-19 impacting the HomeAdvisor background check program?

Due to the coronavirus pandemic, several government agencies and courts across the country have temporarily closed their offices. While HomeAdvisor will continue its background check program to the extent possible, these closures could prevent some background checks from being performed. Please be advised that, during this period, if we could not perform a background check, HomeAdvisor will allow the business into the network and match the business to consumers. As affected government agencies and courts begin to re-open, we will resume our program in those jurisdictions. As always, we encourage consumers to perform their own research, to the extent possible, before hiring any business.

Licensing

We verify any applicable state-level licenses, and we require every business to attest that they carry the appropriate local licensing to practice their trade. Please note that HomeAdvisor does not confirm local licensing. Do your own research using online ratings, reviews and through phone interviews before hiring a company.

Corporate Accounts

Some businesses are employees, franchisees, dealers or independent contractors ("Corporate SP's") of larger national or "Corporate Accounts". When this is the case, we may match you with the Corporate Account or with one of their Corporate businesses. The above screening process does not apply to Corporate Accounts, as HomeAdvisor does not screen Corporate Accounts or Corporate businesses.

Verify Trade License HomeAdvisor checks to see if the business carries the appropriate state-level license. Verify Insurance As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services. Verification of State Business Filings For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located. Criminal Records Search HomeAdvisor uses 3rd party data sources to conduct a criminal search for any relevant criminal activity associated with the owner/principal of the business. Sex Offender Search We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located. Bankruptcy Search We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them. Legal Search for Civil Judgments We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them. Liens Search We use 3rd party data sources to check the principal/owner of the business for liens placed against them. Identity Verification (SSN) HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities. Identity Verification (Reverse Phone Lookup) We conduct a reverse business phone lookup to identify records matching the phone number information provided by the business.

NOTE: Member service professional information confirmed as described above may change or expire over time; while HomeAdvisor attempts to maintain accurate and up-to-date information, and confirms changes when notified, we cannot guarantee that profile and screening information is accurate. Therefore, we recommend that before working with a service professional you verify that information presented is still current and/or acceptable to you.
Please see HomeAdvisor's Terms and Conditions for a full description of how we screen Service Professionals
**Only for U.S. service professionals

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