Commercial Services

J. R. Wilson Engineering provides mechanical engineering services for commercial construction in Ontario. We provide drawings, calculations, and documents required for building permit.  During construction we provide inspection, reports, and letters.

Services offered

  • Mechanical permit drawings
  • Design of heating, cooling, exhaust, and ventilation systems
  • HVAC heat gain and heat loss calculations
  • Building energy modeling and simulation, CANQUEST, EE4, eQUEST
  • HVAC ventilation air calculations per ASHRAE Std 62.1
  • Design of air duct systems
  • HVAC equipment selection
  • HVAC control and automation system design
  • Design gas piping systems
  • P&D hydraulic calculations
  • P&D piping layout and design
  • CAD drafting, modeling services
  • Preparation of all documents required for building permit application
  • Inspection/reports of construction activity per documents
  • LEED Canada building design for mechanical services

Sample Drawings


  • Restaurant open ceiling coordination drawing