About Denron Hall

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.

About Denron Plumbing & HVAC

Denron is a licensed and insured plumbing and HVAC contractor serving residential, commercial and industrial clients located throughout New England. Since 1974, it has been our commitment to complete our projects on time and within budget, while providing our customers with the highest quality of installations paired with reliable customer service.

Our staff of over 150 employees consists of highly trained Project Managers, Licensed Plumbers, Journeymen Plumbers and Service Technicians. We provide quality plumbing and HVAC services in the following areas: Commercial, Residential, Industrial, Design-Build, New Construction and Retrofit applications.

From concept to design, our team of highly trained professionals are with you from start to finish. We have the ability to create, engineer, design and install plumbing, HVAC process piping, medical gases, and building automation systems in all building classifications. In addition, we offer a wide variety of preventive maintenance and service contracts for simple and complex systems.

We also offer 24/7 emergency services for all of our clients throughout New England. When you need emergency plumbing repair, we will be there. Our licensed and insured staff have extensive skills and experience to perform a wide-variety of emergency plumbing services to fix any issues you’re experiencing and give you peace of mind.

About J. Lawrence Hall

Founded in 1937 by one man in an office on Pearson Avenue in Nashua and a Chevy Roadster which was converted to a pickup truck, J. Lawrence Hall has grown into a design-build mechanical contracting firm serving commercial and industrial HVAC clients throughout New England.

Through the years, J. Lawrence Hall Company developed a strong reputation for superior service. The company grew, and in 1945, J. Lawrence Hall relocated from Pearson Avenue to a larger facility at 11 Main Street, where it remained for 38 years.

In 1955, after serving in the United States Air Force, Lawrence’s son, Phil Hall, joined the company as a professional mechanical engineer.

The company incorporated and continued to grow, expanding into design and installation of specialized HVAC and refrigeration systems.

By the 1980s, J. Lawrence Hall Company had again outgrown its location and relocated to 10 Cotton Road, where sales, technical, and administrative staff expanded to accommodate a sales volume that had grown more than threefold.

J. Lawrence Hall Company remained at Cotton Road for 28 years. Phil in turn passed control of the company to his two sons, Elliot and Charlie Hall, in the 1990s. In 1996, a sheet metal shop was added to facilitate the manufacture of ductwork, to improve the company’s control and accountability of their HVAC installation systems.

In 2003, a plumbing division was added to increase full-service mechanical contractor capabilities.

With the ever expanding operations and a strong commitment to community, the company’s current location at 17 Progress Avenue in Nashua was purchased and moved into in December 2011.

J. Lawrence Hall is a full service, commercial plumbing and HVAC resource, capable of designing, installing and servicing sophisticated HVAC systems. J. Lawrence Hall specializes in: Computer Rooms, Industrial Humidification, Air Make-up Systems, Energy Management Systems, Steam/Hot Water Boilers and more.

Mission Statement

To provide our clients with value added services, knowledge, and support, which ensures that every project is a success.

Safety Policy

Denron Plumbing & HVAC, LLC is a Member of Associated Builders and Contractors, Inc. Together with ABC, Denron believes in a zero accident workplace.

Safety has to be everyone’s concern. Your first thought every day should be, “How can I do my job safely?”. Not only should you be concerned about your safety, but that of your fellow workers.

Denron’s goal is to foster a “Zero Accident Culture”. To create the safest and most productive work environment possible.

It is the responsibility of each job site supervisor to make sure that personal protective equipment required by this policy is readily available to all workers on job sites.