NESEA Business Member Directory

The NESEA Business Member Directory includes all organizations that are NESEA Business, Academic, and Non-Profit/Government Members.  Please let people know that you learned about their services from the directory.

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Decumanus Green Design/Build, Inc.

29 Edgewood Dr., Ste. 2
Lenox , Massachusetts 01240
Phone: (413) 281-0046

Decumanus Green provides both design and construction services. Whether you are looking to build new or remodel, we can help you to visualize and realize a new home that fits within your budget. At Decumanus Green we strive to make all of our building practices as environmentally responsible as possible and our homes and additions as energy efficient as possible. We keep ourselves abreast of the constantly developing world of sustainable design and building.

Sectors: Single Family
Service Area: Massachusetts
Professional Specialties: Deep Energy Retrofit, Design/Build, Remodeling/Renovation

Delphi Construction, Inc.

255 Bear Hill Rd.
Waltham , Massachusetts 02451
Phone: (781) 893-9900

At Delphi we are committed to green building and sustainability. We provide training for all staff and work to improve our ability to deliver green/sustainable buildings to our clients. We strive to make Delphi an ever more sustainable company through improved corporate governance.

Sectors: Commercial, Institutional, Industrial, Multifamily
Service Area: Massachusetts
Professional Specialties: Construction Management, General Contractor

Demand Management Institute, Inc. (DMI)

300 Chestnut St., Ste. 150
Needham , Massachusetts 02492
Phone: (781) 449-5700

DMI specializes in providing expert consulting and engineering services to improve energy efficiency and operation of commercial, industrial, institutional, and large-scale residential facilities. DMI has established itself as one of the most respected energy engineering firms in New England with unsurpassed attention to detail and quality.

Sectors: Commercial, Institutional, Industrial, Multifamily
Service Area: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
Professional Specialties: Certification/Commissioning, Consulting, Energy Auditing, Engineering, Incentives

  Midsize NESEA Business Member  

Dietz & Company Architects, Inc.

55 Frank B. Murray St. Ste. 201
Springfield , Massachusetts 01103
Phone: (413) 733-6798

For over 35 years, Dietz & Company Architects has been serving the architectural needs of private and public institutions including the housing, education, hospitality, commercial, and historic preservation sectors. We are dedicated to interpreting our clients’ ideas while building healthy, sustainable communities. We routinely design high-performance buildings and implement a “best practice” approach for energy conservation and sustainable materials whenever it can be determined to be cost-effective for our clients. Our sustainable design achievements include affordable housing developments that are designed to be zero net energy and others that meet Enterprise Green Communities certification criteria.

Sectors: Commercial, Institutional, Multifamily
WMBE: Women or BIPOC Owned
Service Area: Connecticut, Massachusetts
Professional Specialties: Affordable Housing, Architecture/Design, Education, Historic Restoration, Remodeling/Renovation

Dominic Paul Mercadante Architecture

70 Waldo Ave.
Belfast , Maine 04915
Phone: (207) 338-4089

With over 20 years of experience, I bring creativity and attention to detail to my practice of residential architecture, creating buildings that perform well environmentally, functionally, and aesthetically.

Sectors: Single Family
Service Area: Maine
Professional Specialties: Architecture/Design, Consulting

E2 Solar, Inc.

831 Main St., Rte. 6A
Dennis , Massachusetts 02638
Phone: (508) 694-7889

In 2008, E2 Solar was established to deliver high quality photovoltaic systems to residents and businesses on Cape Cod and the South Shore. Since then E2 has cultivated numerous local partnerships to help the community become more energy independent. Jason Stoots and the entire staff at E2 Solar are committed to designing and installing exceptionally efficient, low maintenance, long lasting solar energy systems. E2 offers SunPower PV modules with the highest efficiency and best warranty available. Talk with one of E2 Solar's qualified solar site analysts today.

Sectors: Commercial, Single Family
Service Area: Massachusetts
Professional Specialties: Photovoltaics


205 Newbury St., Ste. 203
Framingham , Massachusetts 01701
Phone: (774) 777-5121

We are bringing clean, efficient energy homes for every American. E4 = energy, economy, equity, environment. E4TheFuture promotes residential clean energy and sustainable resource solutions to advance climate protection and economic fairness by influencing federal, state and local policies, and by helping to build a resilient and vibrant energy efficiency and clean energy sector.

Sectors: Single Family
Service Area: Entire Northeast Region
Professional Specialties: Consumer Information, Education, Public Policy

  Midsize NESEA Business Member  

Earthshare Construction, LLC

20 West Park St. Ste. 309
Lebanon , New Hampshire 03766
Phone: (603) 790-3084

Earthshare Construction specializes in high-performance, energy-efficient, environmentally conscious building construction, retrofit, and weatherization. We offer design, build, energy auditing and consulting services for new builds, renovation, retrofit, and weatherization projects. We are committed to using best practices in sustainable design and construction, incorporating natural, local, and nontoxic materials. We seek to constantly gain knowledge and expertise in contemporary environmentally responsible building methods, and to create buildings that merge energy efficiency with durability, beauty, and functionality.

Sectors: Single Family
Service Area: New Hampshire, Vermont
Professional Specialties: Deep Energy Retrofit, Design/Build, Net Zero, Passive House, Remodeling/Renovation

East Branch Studio

634 Main Rd.
West Chesterfield , Massachusetts 01084
Phone: (413) 296-0123

Our clients often want both high quality and low environmental impact as they build, renovate, or restore their home. They want to reduce energy costs, achieve greater energy independence, and protect their health from toxic chemicals. Whether you want to make your own energy, have a home energy consultation, live in a 'healthy' home, or protect the environment, we have the experience to help you choose the best design and materials for your high-performance home. We have up to date knowledge of products, construction materials, and building processes at all levels. Our team includes experienced trade contractors who can provide a full range of systems for efficient heating, cooling and ventilation, and for generating your own energy.

Sectors: Single Family
Service Area: Massachusetts
Professional Specialties: Carpentry/Cabinetry, Consulting, Deep Energy Retrofit, Design/Build, General Contractor, Healthy Materials, Historic Restoration, Indoor Air Quality, Net Zero, Passive House, Project Management, Remodeling/Renovation

Eco Air

273 Weymouth St.
Rockland , Massachusetts 02370
Phone: (781) 347-4735

Eco Air is a distributor of energy-efficient HVAC products in the Greater Boston market. We are dedicated to bringing new innovative solutions for heating, ventilation and air conditioning as we are passionate about helping our customers achieve the highest standards of energy efficiency possible through high quality, high-performing products. Through our relationship with Thermaduct, ECO Air provides pre-insulated ductwork solutions for indoors that are lightweight and low leakage or outdoors that are designed for the elements. ECO Air offers the patented Aeroseal process to seal medium-pressure ductwork to levels that exceed SMACNA Seal Class A requirements.

Sectors: Commercial, Institutional, Industrial, Multifamily, Single Family
WMBE: Women or BIPOC Owned
Service Area: Massachusetts
Professional Specialties: HVAC, Indoor Air Quality

Eco-Logical Building Solutions

27 Frost Hill Rd.
Marlborough , New Hampshire 03455
Phone: (603) 876-4040

Eco-Logical Building Solutions is a green building design, consulting and project management company. We specialize in implementing sustainable, energy efficient, environmentally friendly building and lifestyle practices that minimize waste of all resources. We strive to provide each customer with a wholly cooperative and personal experience. Whether you are building new, expanding, or remodeling an existing building we want to work with you to come up with eco-logical and cost effective solutions to your building needs.

Sectors: Single Family
Service Area: New Hampshire, Vermont
Professional Specialties: Consulting, Deep Energy Retrofit, Insulation, Net Zero

  Industry Leader NESEA Member  

Eemax, Inc.

400 Captain Neville Dr.
Waterbury , Connecticut 06705
Phone: (203) 267-7890

Eemax is leading the evolution of hot water with cutting-edge technology that provides consistent hot water. It is our mission to drive the progression of efficiency maximized by developing advanced tankless electric hot water heating solutions. We are empowering professionals with trusted and versatile products that can accommodate a multitude of installation scenarios. Today, Eemax products are delivering energy-efficient hot water for restaurants, schools, manufacturing facilities, commercial restrooms, laundries, breweries, medical facilities, and more. Wherever hot water is needed—Eemax has the solutions—making us America’s #1 choice for tankless electric water heaters.

Sectors: Commercial, Multifamily, Single Family
Service Area: Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island
Professional Specialties: Water Heating


The NESEA Business Member Directory is the premier referral resource for consumers and professionals looking for high-performance building and renewable energy professionals in the Northeast.

A listing in this directory results in increased visibility and referrals for our member organizations. The NESEA Business Member Directory is published online and in print (fall issue of BuildingEnergy magazine, circulation 3500). If you would like to be included in the directory, join NESEA today as at one of our organization membership levels. Learn more.