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MEP Engineering

Johnston provides an integrated approach to design with a complete perspective of the infrastructure, performance, maintenance of these systems. Our team members perform feasibility studies, energy models, and infrastructure assessments as required in the development of sustainable building controls, HVAC, emergency power, fire alarms, and low voltage design.

Johnston MEP Engineering is a team of professionals who focus on realistic and responsible solutions. We provide management, engineering, and long-range planning for client’s infrastructure needs. Our ability to hold prime contracts gives them the opportunity to collaborate with architects, contractors, subconsultants and subcontractors with holistic design approaches.


  • Heating/Ventilation/Air Conditioning
  • Central Chiller & Boiler Plants
  • Exhaust Systems
  • Direct Digital Control (DDC) Systems
  • Air Pretreatment & Dehumidification
  • Lab Fume Hood, Airflow & Monitoring
  • Variable Refrigerant Volume Systems
  • Clean Room Air Distribution Systems
  • Data Center Air Distribution systems
  • Heat Recovery


  • Power Distribution Systems
  • Mission Critical & Data/Call Centers
  • Interior and Exterior Lighting
  • Emergency & Exit Lighting
  • Fire Alarm Systems
  • Outlets & Raceway Systems
  • Voice & Data Cabling Systems
  • Emergency & Standby Power Generation
  • Uninterruptible Power Supplies (UPS)
  • Sports Lighting
  • Dimming & Grounding Systems
  • Lightning Protection Systems


  • Hot / Cold Water Distribution
  • Waste & Vent Piping
  • Fire Protection Systems
  • Hot Water Generation
  • Natural Gas Piping Systems
  • Roof Drain & Piping Systems
  • Performance Specs of Auto Sprinklers
  • Lab Gas Systems
  • Compressed Air Systems
  • Vacuum Systems
  • Grease Interceptors
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