NESEA Green Pages Business Directory

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50 Main St., Ste. 1000
White Plains , New York 10606
Phone: 914-263-1199

As an integrated energy engineering firm, EN-POWER GROUP’s services range from engineering design and implementation to energy consulting, managing, and financing. For all projects, our engineers and analysts focus on energy efficiency and resiliency in order to maximize project payback and aid long-term facility planning. Our expertise includes traditional HVAC systems, building green certification, code and law compliance, and on-site generation technologies including solar PV, cogeneration (CHP), battery storage, and emergency power generators. We assist our clients from all building-types in developing a thorough understanding of existing energy-related conditions and in developing solutions to improve efficiency and mitigate environmental impacts in their facilities.

Professional Specialties: Alternative Energy, Beyond Energy, Commercial & Institutional, Consultancy, Energy Auditing, Energy Conservation, Engineering, HVAC, Lighting Design, Mechanical Systems & Lighting, Multifamily, Photovoltaics, Renewables & The Grid

127 Energy

PO Box 5291
Clinton , New Jersey 08809
Phone: 339-545-1271

127 Energy is a renewable energy development firm focused on financing and building solar photovoltaic (PV) and energy storage projects in North America and island environments. Working in clean energy industries since 1997, the Partners and our growing team have extensive finance, development, manufacturing, and policy experience. Through solar PV and energy storage integration, 127 Energy delivers stationary clean energy solutions for commercial customers that achieve and exceed the same demands of fossil fuel power sources, except we do it without the pollution.

Professional Specialties: Commercial & Institutional, Photovoltaics

377 Builders

PO Box 483
Housatonic , Massachusetts 01236
Phone: 413-429-6075

We are a member-owned general contracting company based in the Berkshires of Western Massachusetts. Our expertise is in residential and light commercial construction, including additions and full-scale renovations for your home or building. We also specialize in custom cabinetry and sustainable practices. As a tech-savvy group we use web-based project management tools that make collaboration an easy and enjoyable experience. We'll present you with the best options to suit your vision and resources whether innovative, traditional, or a blend of both.

Professional Specialties: Building Design & Construction

3ACH50, Inc.

250 North St.
Ste. A-3
Danvers , Massachusetts 01923
Phone: 978-992-1439

3ACH50, Inc. specializes in effective, results oriented air barrier solutions for multi-family and single family buildings to help builders meet energy code requirements.

Professional Specialties: Construction Process, Design Process, Education, Energy Auditing, Energy Conservation, Envelope & Enclosure, Indoor Air Quality, Insulation, Multifamily, Net Zero Energy, Passive Housing, Single Family, HERS Rater

475 High Performance Building Supply

334 Douglass St.
Brooklyn , New York 11217
Phone: 800-995-6329

475 High Performance Building Supply (475) provides essential building knowledge and components to building professionals. 475 helps make more durable, resilient, ecological, and energy-efficient buildings that optimize occupant comfort and health. We enable the building improvements required to dramatically reduce our energy demand and address our climate crisis. We are an ecommerce-based catalyst in the transformation of US construction to high-performance, low-energy and Passive House buildings. The name “475” is a reference to the heat demand requirement of the Passive House Standard, 4.75 kilo BTUs per square foot per year. Passive House is the gold standard for high performance construction today.

Professional Specialties: Envelope & Enclosure, Insulation, Manufacturing, Passive Housing, Windows

A.W. Hastings & Company

2 Pearson Way
Enfield , Connecticut 06082
Phone: 800-966-2784

As a leading distributor for Marvin Windows & Doors, A.W. Hastings & Co partners with its retailer network to bring their customers' vision to life throughout the northeast. Made in the USA and sold and serviced locally, Marvin products are manufactured with sustainability in mind, starting with design and continuing through the entire life cycle of every project, always with an emphasis on long-term durability, efficiency and quality. Whether your project is passive house, Net Zero, or a home that simply uses elements of sustainable design, the Marvin Family of Brands provides solutions you need - including dual pane and tri-pane options yielding total window U-Factor values as low as .15.

Professional Specialties: Windows

A&B Cooling

660 Nutmeg Rd. North
PO Box 1356
South Windsor , Connecticut 06074
Phone: 860-528-4436

Geothermal specialists since 1995, LEED Gold and Silver designer and installer, custom fabricated duct systems, radiant floor systems, heat and energy recovery ventilation systems.

Professional Specialties: Geothermal, HVAC, Indoor Air Quality, Mechanical Systems & Lighting

A9 Green / Total Green Energy Solution, LLC

329 Massachusetts Ave.
Lexington , Massachusetts 02420
Phone: 781-357-2454

Since 2009, A9 Green has delivered HERS Ratings and energy efficiency consulting to developers, architects, and builders of single and multi-family residential projects in over 85 towns across eastern Massachusetts. Our expertise in energy modeling, architecture, and building science help build better homes while reducing costs and environmental impact.

Professional Specialties: Building Design & Construction, Construction Process, Consultancy, Design Process, Energy Auditing, Energy Conservation, Engineering, Envelope & Enclosure, Indoor Air Quality, Insulation, Research

Ace Energy Services, Inc.

250 North St.
Ste. A-3
Danvers , Massachusetts 01923
Phone: 781-369-5921

Ace Energy Services, Inc. is dedicated to saving builders on construction costs through the use of HERS Ratings. We help builders meet code and work to maximize rebates.

Professional Specialties: Energy Auditing, Indoor Air Quality, Multifamily, HERS Rater

Advanced Building Analysis, LLC

2 Woodlawn St.
Amesbury , Massachusetts 01913
Phone: 978-270-3911

ABA is an industry leader of energy analysis, diagnostic, and verification services in Massachusetts and southern NH. We are an ENERGY STAR partner who helps builders of new single family and multi-family homes cost effectively meet the challenges of higher energy efficiency standards. ABA consults with architects and builders to improve building energy efficiency to meet or exceed program goals established by EPA’s ENERGY STAR, MA Residential New Construction programs, as well as Building Code consultation and verification.

Professional Specialties: Certifications & Standards, Energy Auditing, Multifamily, Single Family


The NESEA Green Pages 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 the NESEA Green Pages is a feature of a NESEA business membership that results in increased visibility and referrals for our member companies. The Green Pages is published online and in print (fall issue of BuildingEnergy magazine, circulation 3750). If you would like to be included in the directory, join NESEA today as a business member. Business memberships start at $250.