Large Building Testing and Commissioning

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Large Building Testing and Commissioning

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Air tightness testing provides quality assurance of a new building’s air barrier system and benchmarking of an existing building’s air barrier system versus industry standards. High performance air barriers and low infiltration rates are foundational to ensuring healthy, comfortable, durable and efficient buildings.

Air tightness testing of large commercial and residential buildings is a common practice required for low carbon, near-zero energy building codes and volunteer efficiency building programs like LEED and ENERGY STAR. Across Canada, many provincial building codes will soon require air tightness testing of large buildings prior to occupancy.

Air tightness testing informs building designers on how much air is escaping in and out of a building through unseen holes. Through testing, a building air leakage curve can be created to determine how a building reacts to natural and mechanical pressure differentials. Induced pressures are generally caused by:

  • Wind
  • Stack effect
  • Ventilation fan systems
  • Heating and cooling fan systems
For more information, email Kyle Anders at

Benefits of Air Tight Buildings


Preservation of the building enclosure through limiting moisture transport via air leakage


Improved energy efficiency, lower utility costs


Lower heating and cooling loads, reducing the sizing of HVAC equipment and ductwork


Greater occupant comfort through minimizing drafts, noises and odours from exterior and adjacent zones.

Energy Savings Calculator

Calculate your way to savings with this web-based energy savings calculator for building envelope air tightness from Oak Ridge National Laboratory.

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Air Tightness Testing Standards for Large Buildings

We have an extensive inventory of air tightness testing equipment and are able to test according to the following standards for large buildings:

Air Tightness Testing Programs and Codes for Large Buildings

Below are some of the various building codes and programs we provide testing for:

  • ENERGY STAR for Multi-Family High-Rise
  • LEED
  • Enbridge - Savings by Design, Commercial Air Tightness Testing Program
  • Toronto Green Standard
  • National Energy Code for Buildings
  • PHIUS+
  • Passive House
For more information, email Kyle Anders at

“We rely on Building Knowledge for all commissioning and verification of all Great Gulf low-rise projects. This includes all airtightness testing and all pre-development energy modelling on drawings for permits. Building Knowledge also provides in-house training for service, sales staff, and construction on the benefits of how to build, sell and service energy-efficient homes.”

Great Gulf
Shaun M Joffe
Executive Director, Sustainability & Building Sciences