RN Engineering

RN Engineering is a trusted mechanical engineering firm based in Thornhill, Ontario, providing professional HVAC design, plumbing design, drainage design, fire protection design, and energy modelling services across Markham, Toronto, Vaughan, Richmon...

RN Engineering is a trusted mechanical engineering firm based in Thornhill, Ontario, providing professional HVAC design, plumbing design, drainage design, fire protection design, and energy modelling services across Markham, Toronto, Vaughan, Richmond Hill, and surrounding Ontario areas. Our licensed engineers deliver efficient, code-compliant solutions for residential, commercial, and industrial projects, ensuring every system is designed for safety, performance, and long-term reliability. From residential HVAC design to commercial mechanical engineering and permit-ready drawings, RN Engineering works closely with architects, developers, and contractors to deliver high-quality, sustainable results.