We Work with You to Achieve Your Goals

Isotherm Engineering is a full-service mechanical consulting engineering and third-party building commissioning firm. We extend our engineering strengths with energy audits, measurement and verification, energy models, thermography and other specialty services. 

Since 1975, Isotherm has been providing high-performance sustainable solutions for new and existing buildings in the industrial, commercial, multi-residential high-rise, and institutional sectors.


Isotherm Engineering Ltd is a full-service mechanical and electrical consulting engineering firm specializing in sustainable design. Our team has extensive experience designing strategic solutions across the diverse building and system types. The Principals and associates bring a solid foundation of experience working as a team. Each share a common goal to be responsive to our client’s needs by providing outstanding support, dedication and the latest most cost cost-effective mechanical and electrical design. Our firm specializes in Multi-family Residential, Commercial, Retail, Office Space, Tenant-Improvement, and Retrofit Industrial Buildings. We strive to provide leadership and organization to produce designs that achieve their requirements in terms of function, schedule, budget, constructability, safety, and sustainability. For all projects, we are committed to applying sustainable and cost cost-effective tailored to each project's specific needs and requirements.


Isotherm Engineering Ltd is a third-party commissioning provider. Our commissioning services include verifying that building systems are designed, installed, tested and capable of being operated and maintained to perform as intended as per the client’s project requirements. A commissioned building provides improved energy efficiency, indoor air quality and occupant comfort, as well as a foundation for minimal operation and maintenance costs. Our commissioning engineers/specialists use the most current technology and focus on the design, construction and operation phases to facilitate system performance and sustainable projects for our clients.

New building commissioning is a critical step in ensuring the individual systems in a finished project meet engineering design requirements. The process involves extensive testing and analysis, training of staff and identifying and correcting any conformance issues with the building’s electrical, HVAC, lighting or other systems. Retro-commissioning and recommissioning are similar processes employed on existing buildings. Recommissioning involves retesting a previously commissioned building. This is typically done either to address operational problems or to satisfy the requirements of new owners. Retro-commissioning, on the other hand, involves testing a building that has not previously been commissioned. This is done to identify potential improvements or enhance individual systems' performance.