Internat Energy Solutions Canada


Sustainability Consulting

  • Greenhouse Gas Reduction Strategies
  • Greenhouse Gas Verification
  • Climate Change Vulnerability
    and Adaptation


Energy Efficiency

  • Energy Audits
  • Energy Modelling
  • Building Systems Analysis and Design
  • Sustainable Design


Renewable Energy

  • Feasibility Analysis
  • System Modelling
  • System Design
  • Verification and I-V Curve Tracing


Sustainable Design
PDF Print E-mail

Passive Solar Design

Internat Energy Solutions has worked on a number of passive projects in Europe. From the conception and design phase, we use 3D modeling tools to quantify energy efficiency, passive solar gains, and internal gains. This allows us to find substantial energy savings right from the design phase.

A number of passive energy standards exist in Europe please see the following links for more information on these regulations:


Passive House (German: Passivhaus) is a rigorous and voluntary based energy standard that is focused on passive solar building design.  The Passive House buildings typically achieve 90% energy savings in heating and cooling as compared to other traditional buildings. The passive house standard is applicable to many building types such as residential homes, commercial offices and schools.

Standard Criteria:
In order to be certified as a Passive House, the following targets need to be met:

· Heating energy demand: ≤ 15 kWh/ m^2. yr

· Heating load: ≤ 10 W/m^2

· Excess temperature frequency (over 25 degrees): ≤ 10%

· Cooling energy demand: ≤ 15 kWh/ m^2. yr

· Airtightness: ≤ 0.6 ACH @ 50 Pascals (n50)

· Primary energy demand: ≤ 120 kWh/ m^2. yr

Key Design Features:

· Increased thermal comfort for occupants

· Better indoor air quality

· Decreased GHG emissions due to lower energy use

· Reduced energy costs

· Potential to obtain net zero energy with renewable energy production

Key benefits of Passive House design and construction:

· High performance building envelope with high insulation R-values

· High performance windows

· Passive solar design to allow solar heat gains in winter and shade solar gains in the summer

· Heat recovery ventilation

· Continuous airtight layer

· Careful detailing to reduce thermal bridging


· L   LEED® Green Building

The Leadership in Energy and Environmental Design (LEED®) Green Building Rating System™ is the North American standard for sustainable building design. Its universal goal is to stimulate adoption of sustainable practices in building construction and operation. The program achieves this through globally verified analysis methods and evaluative criteria.

The program is used as third-party verification and benchmarking of the design, construction and operation of sustainable buildings. LEED® analysis and design can have an immediate and measurable impact on building performance through its appropriate methods of assessment.

LEED® employs a comprehensive system of five interrelated standards for human and environmental health that cover all aspects of the building development and construction process:

  • Sustainable site development
  • Water efficiency
  • Energy efficiency
  • Materials selection
  • Indoor environmental quality

A cumulative point scoring system determines a building`s LEED® certification level. A building’s score is independently reviewed and audited before it’s assigned one of four certification categories: certified, silver, gold and platinum.

The Canadian Green Building Council’s LEED® system was modified from the U.S. Green Building Council version to account for Canadian climates, construction practices and regulations. Through a transparent process involving industry experts and stakeholders, this system was adapted to the Canadian market and represents various sectors of the Canadian industry.

For more information on LEED®, please visit the Canada Green Building Council.

HQE™ International

Haute Qualité Environnementale or HQE™ (High Environmental Quality) is a French certification standard for green buildings based on a third party approach. Work is performed and then verified by an independent auditor in order to ensure liability and impartiality. HQE™ certification assesses a building’s construction and performance over its lifetime, promoting a model of continuous improvement.

HQE™ allows local standards or regulations to guide the certification instead of predefining a one-size-fits-all set of criteria. HQE™ does not cite specific technologies or components (materials) to the extent that LEED® does.

The rating system is based on four main categories: Energy, Environment, Health, and Comfort.

Certivéa, the French body leading the HQE™ standard, is now launching it on an international level, starting with Canada. The whole system has been adapted to the local specifications, requirements and needs.

For further information please contact:

Livio Nichillo
(416) 628-4658 Ext.140
This e-mail address is being protected from spambots. You need JavaScript enabled to view it