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Business Details
We are Jennings Dill, a family-owned mechanical contractor founded in 1947, making us the oldest provider of HVAC, plumbing, and process piping services in the Upstate. With over 75 years of continuous operation, we have built a reputation for delivering high-quality, code-compliant installations across industrial, commercial, institutional, and healthcare sectors. Our expertise includes custom welded fabrication, design-build project delivery, and comprehensive maintenance solutions tailored to each client's specifications. We solve complex mechanical challenges by leveraging decades of hands-on experience and a skilled workforce trained in the latest industry technologies. Safety is the cornerstone of our work; we conduct daily safety briefings and multiple annual training programs to maintain an accident-free jobsite. Our professional standards are upheld through strict adherence to licensed practices in South Carolina, North Carolina, Georgia, and Tennessee, and by continuously exceeding client expectations.

We invest heavily in our people, offering structured career pathways, mentorship programs, and ongoing education to ensure lifelong careers for our employees. Our commitment to client satisfaction is demonstrated by our consistent track record of on-time project completion and transparent communication throughout every phase of service. As a recognized community partner, we have been honored as Greenville County Business Partner of the Year and South Carolina Association for Career and Technical Education Business Education Partner of the Year. We pride ourselves on integrity, reliability, and the ability to deliver innovative mechanical solutions that meet the evolving needs of our diverse clientele. Our dedication to excellence and safety ensures that every project we undertake reflects our long-standing legacy of craftsmanship and trust.
Highlights and features
  • We are the oldest Upstate mechanical contractor since 1947.
  • We conduct daily safety briefings and multiple annual safety trainings.
  • We provide custom welded fabrication for any material specification.
  • We hold licenses in SC, NC, GA, and TN.
  • We were named Greenville County Business Partner of the Year.
Services
HVAC Service
We provide HVAC installation, maintenance, and repair for commercial, industrial, and healthcare facilities across the region. Our licensed technicians ensure code-compliant, energy-efficient systems through rigorous testing and preventive maintenance programs. Clients benefit from consistent comfort, lower energy bills, and healthier environments for occupants.
Plumbing Service
We install, maintain, and repair plumbing systems for residential, commercial, and institutional buildings. Our certified plumbers follow strict code standards to deliver leak-free, durable solutions that protect property value. Customers enjoy reliable water flow, reduced repair expenses, and peace of mind from professional service.
Process Piping
We fabricate and install custom process piping systems tailored to industrial applications. Our engineering team uses high-precision welding and material selection to meet exact client specifications and safety regulations. Clients receive durable, leak-resistant piping that enhances operational efficiency and reduces downtime.
Design-Build
We deliver integrated design-build solutions for commercial, educational, religious, and healthcare projects. Our multidisciplinary teams coordinate planning, construction, and commissioning to ensure on-time delivery and client satisfaction. Clients benefit from streamlined project management, reduced schedule risk, and a single point of contact for all phases.
Reviews (1)
Chelsea Hanna
Jun 21, 2022 Report
Two of these workers went out of their way to help me today I can't remember their names but they where at at. Francis downtown working and helped me change my tire in this heat! Thank you guys so so much!