Engineered Concepts of Pompano Beach, Fla., and William T. Royster & Associates of Pineville, N.C., are the newest sales representatives for ProTech Systems Inc.

PTS offers special gas venting and natural draft chimney venting products. Product lines include the FasNSeal, FasNSmooth, FasNFlex, FasNClamp and Ventinox for the HVAC and hearth industries.

Engineered Concepts has provided representation for many HVAC and plumbing brands and product lines, including residential water heaters and commercial restroom products, since its formation in 1979.

Founded in 1979, William T. Royster & Associates has developed a history of representing water heating and hydronic heat products throughout the Carolinas.