CanadaCanada

National Building Code of Canada 2010

Energy efficiency requirements for housing and small buildings that are less than 600 m2 in footprint and not more than three stories, excluding some industrial occupancies. 

Applicable Building Type(s)

New residential, New non-residential, Existing residential, Existing non-residential

Policy Requirement Level

Model Code

Policy Sequence

Governance

Development Authority: Canadian Commission on Building and Fire Codes (CCBFC)

Implementation Authority: Adopting jurisdiction

Verification Authority: Adopting jurisdiction

Enforcement Authority: Adopting jurisdiction

Prescriptive Compliance path

Prescriptive Compliance Path

Prescriptive requirements apply to building envelope components, heating ventilating and air conditioning equipment, and potable water heating equipment.

Energy Requirements:

Insulation

 

Building assemblies above ground:

U-Values (W/m2.K)

Floors

Roofs, Attic

Roofs, Other

Walls

Climate zone 4

0.214

0.145

0.214

0.360

Climate zone 5

0.214

0.115

0.214

0.325

Climate zone 6

0.214

0.115

0.214

0.325

Climate zone 7A

0.199

0.096

0.199

0.325

Climate zone 7B

0.199

0.096

0.199

0.385

Climate zone 8

0.199

0.096

0.199

0.385

Building assemblies in contact / below the ground:

U-Values (W/m2.K)

Floors, heated

Floors, above the frost lint

Roof

Walls

Climate zone 4

0.431

0.510

0.510

0.503

Climate zone 5

0.431

0.510

0.510

0.336

Climate zone 6

0.431

0.510

0.510

0.336

Climate zone 7A

0.352

0.510

0.269

0.289

Climate zone 7B

0.352

0.510

0.269

0.289

Climate zone 8

0.352

0.510

0.269

0.289

 

Windows

 

U-Values (W/m2.K)

Windows

Climate zone 4

1.8

Climate zone 5

1.8

Climate zone 6

1.6

Climate zone 7A

1.6

Climate zone 7B

1.4

Climate zone 8

1.4

Doors

 

U-Values (W/m2.K)

Doors

Climate zone 4

1.8

Climate zone 5

1.8

Climate zone 6

1.6

Climate zone 7A

1.6

Climate zone 7B

1.4

Climate zone 8

1.4

Skylights

Total skylight area shall be less than 5% of the gross roof area

U-Values (W/m2.K)

Skylights

Climate zone 4

2.9

Climate zone 5

2.9

Climate zone 6

2.7

Climate zone 7A

2.7

Climate zone 7B

2.4

Climate zone 8

2.4

Air Leakage

Prescriptive requirements list for sealing the building air barrier

 

End-uses considered:

Space cooling, Space heating, Water heating, Ventilation

Performance Compliance path

Energy Performance Compliance

Performance compliance calculations determines the annual energy consumption of a reference house and sets the minimum energy target for the proposed house to that level. 

Energy Requirements:

Insulation

Reduction is limited by health and safety requirements. 

Windows

Where fenestration and door to gross wall area is less than 17%, the reference house is set to 17%. Where fenestration and door to gross wall area is greater than 22%, the reference house is set to 22%.

Air Leakage

An assumed building airtightness of 2.5 air changes per hour (ACH) is applied to the reference house. The proposed can measure airtightness or use an assumed 2.5 ACH in the simulation.

Space Heating System

Reference house applies a prescriptive type system for the applicable fuel type

Space Cooling System

Reference house applies a prescriptive type system for the applicable fuel type

Water Heating System

Reference house applies a prescriptive type system for the applicable fuel type

Compliance Softwares:

All energy modelling software used for code compliance calculations must conform to ANSI/ASHRAE 140, “Evaluation of Building Energy Analysis Computer Programs”

End-uses considered:

Space cooling, Space heating, Ventilation, Water heating

Resources

Notes

Housing and small buildings can choose to apply the energy requirements from the National Energy Code for Buildings 2011 instead of the energy requirements in Part 9 of the National Building Code of Canada. See policy title National Energy Code for Buildings 2011.

Climate zones

Heating Degree Days

 

HDD (18°C)

Climate zone 4

<3000

Climate zone 5

3000-3999

Climate zone 6

4000-4999

Climate zone 7A

5000-5999

Climate zone 7B

6000-6999

Climate zone 8

≥7000

 

Heating Degree Days for Ontario Codes

 

HDD (18°C)

Climate zone 1

<5000

Climate zone 2

>5000

Climate zone 7  <5000