Larger & Stronger

Joining Forces

Announcing the merger of Denron Plumbing & HVAC and J. Lawrence Hall

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Commercial

HVAC Design-Build

Designed, Built & Matched for your needs

We are committed to finding ways to develop more efficient HVAC systems that can operate in an energy efficient and cost-effective manner, for long-term use.

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Commercial

HVAC Service

Providing Unmatched Level of Service

We are able to offer a wide variety of preventive maintenance and service contracts for the most simplistic of systems to the most complex.

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Commercial

Plumbing Service

fully licensed & insured

Our staff consists of highly trained, professional plumbers who are dedicated in providing our clients with top-quality installations and complete customer satisfaction in every project and application.

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Commercial

Drain Cleaning

On time, within budget & without hassle

We are fully insured for commercial operations and provide same day service, routine maintenance contracts and emergency drain cleaning service.

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Over 40 Years

of Quality & Professionalism

Two of New Hampshire’s most successful mechanical contractors have combined teams to form a commercial plumbing and HVAC powerhouse in the market. Denron Plumbing & HVAC LLC, serving commercial and industrial plumbing and HVAC clients throughout New England since 1974, and J. Lawrence Hall, family-owned and operated design-build mechanical contractor in Nashua since 1937, have merged to form Denron Hall.

It was important for each company to find a partner who could help carry on the legacies built over decades. Taking care of our employees and customers long-term has been our top priority. This merger makes us larger and stronger.

Emergency HVAC Service Emergency Plumbing Service
HVAC Design-Build

Have your HVAC system designed, built and matched for your specific needs. From concept to design, our team of professionals are with you from start to finish.

Denron Commercial HVAC Service
Commercial HVAC Service

We are able to offer a wide variety of preventive maintenance and service contracts for the most simplistic of systems to the most complex.

Denron Commercial Plumbing Service
Commercial Plumbing Service

Need sewer or drain services right away? We can help with a wide range of problems that unexpectedly arise in all property markets.

Denron Commercial Drain Cleaning
Commercial Drain Cleaning

We are fully insured for commercial operations and provide same day service, routine maintenance and emergency drain cleaning service.

Why Choose Us?

  • 24/7 Emergency Service

    We understand that plumbing emergencies happen and make ourselves available 24/7 to handle any emergency you may have.

  • Projects Done On Time

    We will complete your project on time, within budget and without hassle, while guiding you every step of the way.

  • Licensed & Insured

    Our highly trained, licensed and insured staff are dedicated to providing top-quality work and customer satisfaction throughout every step of the project.

  • Unmatched Customer Service

    Our extensive portfolio and strong partnerships directly illustrate why we have been one the leaders of our industry for over 40 years.

Now Hiring

Denron Hall is an exciting place to work with plenty of room for advancement. See if a career with us is right for you.

Make Yourself Comfortable with an Authorized Mitsubishi Electric Diamond Contractor

You demand the best and so does Mitsubishi Electric. We have been selected as a Diamond Contractor because we value the highest level of certification, training, and hands-on expertise. Mitsubishi Electric has selected the finest and most knowledgeable HVAC contractors in the industry to provide you with superior sales, installation, and service support possible.

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