Energy Performance Engineering provides high value commissioning services to building owners and representatives with projects up to 500,000 sf and combine efforts with other firms for projects over 500,000 sf.

Core Services

Energy Performance Engineering

System Commissioning

A project delivery process of ensuring that systems are designed, installed, tested, and operated/maintained per owner’s operational needs.

  • New Construction Commissioning
  • Existing Building Commissioning
  • Monitoring-Based Commissioning

Energy Performance Engineering

Building Controls & Design

A robust Direct Digital Control (DDC) system design in Heating, Ventilating, and Air-conditioning control application.

  • HVAC System Diagnostics
  • Control Retrofit Design
  • Control System Optimization
  • Digital Controls Master Planning
  • Fault Detection & Diagnostics
  • Measurement & Verification

Energy Performance Engineering

Facility Asset Management

An effective strategy for sustainable facility and resource management.

  • Facilities Management Support
  • Asset Management Strategic Planning
  • Site Analysis/Evaluation


Founder and owner James Jen is a Registered Mechanical Engineer in Oregon with more than 27 years of experience in building commissioning and system controls. He was a Facility Engineer for high tech facilities, which gave him deep understanding of the needs of building owners. His well-­rounded experience came from working for designers and control contractors as well as teaching college level DDC course.

James’ diverse background gives him a holistic perspective on commissioning projects, which is rare to find in the industry. He is currently involved in ASHRAE as a Technical Committee – 1.4 Control Theory & Application member and is involved on the Guideline Project Committee – 36 High-Performance Sequences of Operation for HVAC Systems.

The uniqueness of Energy Performance Engineering could be seen from the following:

  • We have a System Readiness Tracking Sheet for construction team to implement commissioning tasks, which simplifies the whole process.
  • With the diverse knowledge of our commissioning agents, we have intimate understandings about building systems.
  • A diagnostic tool is utilized to generate control diagrams and functional test procedures.
  • We document our commissioning projects on a web-­based database. All equipment data, functional checklist, and functional performance test procedures are generated in the database. With this web-­based platform, we will be able to have real time accessing and tracking of commissioning progress.

Download our full Capabilities Statement.

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