Full M & E

ONSA designs mechanical and electrical infrastructure for a wide variety of building types and clients utilizing a wide range of project delivery methods.

ONSA has established a strong reputation for innovative cost effective designs and quality of service. The firm’s aim is to gain an understanding of the Client’s perspective and needs in order to provide the best possible engineering solutions to meet their objectives. The firm provides holistic and complete design and professional services through all phases of the project – including initial project inception, planning, definition, design, commissioning, turn over and post occupancy. We are continually reviewing the latest in energy efficiency technologies, sustainable construction, integrated design approaches and construction practices.


Specifically, our core services include the following design elements:



  • Power Supply & Distribution
  • UPS & Emergency Power
  • Energy Efficient Lighting
  • Equipment Grounding
  • High Voltage Systems
  • Power Co-ordination Studies
  • Communication & Cable Management
  • Structured Cabling
  • Security Systems
  • Public Address & Paging
  • Fire Alarm
  • Power Quality Analysis


  • HVAC Design
  • Plumbing & Drainage
  • Sprinkler & Fire Protection
  • Direct Digital Controls
  • Water Purification
  • Medical & Lab Gases
  • Industrial & Lab Piping
  • Indoor Air Quality
  • Refrigeration Systems
  • Heat Recovery Systems
  • Energy Modeling - Efficiency Nova Scotia Qualified Energy Modeller