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National Energy Code of Canada for Buildings 2011

In 1997, the Government of Canada introduced a Model National Energy Code for Buildings (MNEBC 1997), which augmented the existing National Building Code with a set of energy-specific criteria on top of the National Building Code’s (NBC) existing health and safety requirements. National Building Codes in Canada do not have force in law, and are adopted (or adapted) by jurisdictions (provinces and territories) on an individual basis. 

The province of Ontario and the city of Vancouver adopted the original MNECB 1997, and it became an important reference for design recognition and incentive programs. An update version, 25% more stringent than MNECB was introduced in 2011.  As of 2015, the National Energy Code of Canada for Buildings 2011 (NECB) had been adopted by five provinces (representing 69% of the nation’s total floor space. The remaining jurisdictions either have adopted an equivalent standard are actively considering NECB 2011 for adoption.

This Code applies to all new commercial, institutional and residential buildings, except single family and small multiple family buildings (<600m2  footprint) which are covered by Part 9.36 of the National Building Code of Canada 2010 (NBC 2010). 

Applicable Building Type(s)

New residential, New non-residential

Policy Requirement Level

Model Code

Policy Sequence

Governance

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

Implementation Authority: Provincial and Territorial Governments and some Chartered Cities

Verification Authority: Municipal Governments

Enforcement Authority: Municipal Governments

Prescriptive Compliance path

Division B, Acceptable Solutions

Sub-section 2 of Parts 3 to 7 in Division B 

Energy Requirements:

Insulation

 

Building assemblies above ground:

U-Values (W/m2.K)

Floor

Roof

Walls

Climate zone 4

0.227

0.227

0.315

Climate zone 5

0.183

0.183

0.278

Climate zone 6

0.183

0.183

0.247

Climate zone 7A

0.162

0.162

0.210

Climate zone 7B

0.162

0.162

0.210

Climate zone 8

0.142

0.142

0.183

Building assemblies in contact / below the ground:

U-Values (W/m2.K)

Floor

Roof

Walls

Climate zone 4

0.757

0.568

0.568

Climate zone 5

0.757

0.379

0.379

Climate zone 6

0.757

0.284

0.284

Climate zone 7A

0.757

0.284

0.284

Climate zone 7B

0.757

0.284

0.284

Climate zone 8

0.379

0.210

0.210

 

Windows

Allowable areas of fenestration are dependent on climate and vary with compliance paths. For prescriptive path see 3.2.1.4, for performance path see table A-3.2.1.4 (1) NECB2011

U-Values (W/m2.K)

Windows

Climate zone 4

2.4

Climate zone 5

2.2

Climate zone 6

2.2

Climate zone 7A

2.2

Climate zone 7B

2.2

Climate zone 8

1.6

Doors

Allowable areas of doors are dependent on climate and vary with compliance paths. For prescriptive path see 3.2.1.4, for performance path see table A-3.2.1.4 (1) NECB2011

U-Values (W/m2.K)

Doors

Climate zone 4

2.4

Climate zone 5

2.2

Climate zone 6

2.2

Climate zone 7A

2.2

Climate zone 7B

2.2

Climate zone 8

1.6

Skylights

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

Air Leakage

Component

Air Leakage

l/s-m2 at 75 Pa

Windows

0.2

Doors

5.0

Space Heating System

Performance requirements for unitary and packaged HVAC equipment for prescriptive and trade-off paths are in table 5.2.12.1 

Space Cooling System

Performance requirements for space cooling systems for prescriptive and trade-off paths are in table 5.2.12.1 

Water Heating System

Performance requirements for service water heating equipment for prescriptive and trade-off paths are in table 6.2.2.1

Lighting

Lighting power densities for trade-off and prescriptive paths are in table 4.2.1.5 and 4.2.1.6 NECB 2011

Renewable Energy

N/A

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, Water heating, Lighting interior, Ventilation, Auxiliary devices, Lighting exterior

Performance Compliance path

Division B, Acceptable Solutions

Building Energy Performance Compliance Path; Sub-section 8.4 of Division B.  Under the performance compliance path, the annual energy consumption of the proposed building cannot exceed the building energy target of a reference building that meets the prescriptive requirements of the code. 

Energy Requirements:

Windows

Allowable areas of fenestration are dependent on climate and vary with compliance paths. For prescriptive path see 3.2.1.4, for performance path see table A-3.2.1.4 (1) NECB2011

Doors

Allowable areas of doors are dependent on climate and vary with compliance paths. For prescriptive path see 3.2.1.4, for performance path see table A-3.2.1.4 (1) NECB2011

Air Leakage

For the performance compliance path, air leakage is set at a constant value of 0.25 l/s-m2

Space Heating System

HVAC system selection for performance compliance path are given in table 8.4.4.9(1) of NECB2011

Space Cooling System

HVAC system selection for performance compliance path are given in table 8.4.4.9(1) of NECB2011

Water Heating System

The part load characteristics of service water heating equipment shall be modeled as per Table 8.4.4.21.D of NECB2011

Lighting

Dwellings must be modelled with an installed interior lighting power density of 5 W/m2 

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:

Lighting exterior, Lighting interior, Space cooling, Space heating, Ventilation, Water heating, Auxiliary devices

Resources

Notes

The area of a floor surface, incl. heated garages, measured from the interior surface of the perimeter walls at or near floor level, incl. area covered by interior walls and openings in the floor.

Thermal comfort temperature is (24 ± 2)°C

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