Harris

RM Thornton Mechanical is an industry leader in providing plumbing and HVAC services throughout Maryland, Virginia, and the District of Columbia since 1932. As a go-to mechanical contractor, we perform every job with the customer service, craftsmanship, integrity and experience that is expected by our customers. Our team is comprised of experienced industry professionals who always deliver projects to industry’s highest standards. We always work hard to ensure the quality products we deliver are on time and within budget.After more than 80 years, RM Thornton Mechanical is continually being recognized by the industry and marketplace alike for our outstanding performance and quality mechanical contracting. Every project we take on is delivered with our mission in mind – Quality without Compromise since 1932.RM Thornton Mechanical is a division of national mechanical contractor Harris Companies, whose core purpose is “leadership through innovative and responsible solutions”.