Appendix A — Division B

Explanatory Material

change beginA-10.2.1.1.(3) Deletedchange end

contentHistory

change beginA-10.2.2.2. [Deleted.]
A-10.2.2.2.(1) Lighting Controls in Residential Buildings
The objective of Sentence 10.2.2.2.(1) is to require a master switch that will permit non-essential lighting to be turned off when an occupant leaves the premises. As this was only intended to consider residential portions of a building, it is considered acceptable to consider each portion of the building structure located above the parkade slab constructed to Article 3.2.1.2. on an individual basis given that the cost-effectiveness of such energy saving features would not be as significant for smaller structures with proportionally larger exterior wall and roof surface areas relative to their volume.
A-10.2.2.7. Windows, Glass Doors and Skylights
Compliance with the energy performance requirements of the By-law is demonstrated by means of labels affixed to the products at the manufacturing location.
The energy performance labels recognized for By-law compliance are the labels required by the BC Energy Efficiency Act (BCEEA). The BCEEA requires all manufactured windows, sliding glass doors and skylights to bear labels certifying the product U-values determined according to the NFRC 100-2010 or CSA A440.2-09 standards. Each product shall bear two labels: a removable "temporary" label indicating the product U-value, and a non-removable "permanent" marking or label identifying the certification entity and the manufacturer. All windows, sliding glass doors and skylights sold in BC are required to bear such labels.
Valid labels must bear the trademark of a third-party verifier. The following verification agencies are recognized for this purpose, and provide a permanent label:
In the case of products complying with the By-law under the "flexibility provision", Professional engineers, and architects authorized to practice in British Columbia are designated for the purpose of verifying energy performance in the same manner as in BCEEA 4 (1.2) (a) and (b).
The certification programs that verify U-values according to these standards require these labels to be applied at the factory. They do not permit labels to be applied at the jobsite without prior authorization of the certifier.
Fenestration products may have more than one U-value label applied to them. For example, a window with an operable casement beside a fixed lite commonly has two labels: one on the fixed lite, another on the casement. The U-value of the operable component is typically higher. When there is more than one label on a fenestration product, the one with the highest U-value is used to represent the performance of the product.
Permanent markings serve to identify the energy performance verifier, the product manufacturer, and the product line after the temporary labels are removed. They confirm that the product's energy performance has been verified, and allows records about that product line's energy performance to be retrieved by the verifier. Permanent markings may be in the form of an inconspicuous label adhered to the window or sliding door frame, sometimes on the edge of a sash so as to be less visible. They may also be etched into the glass at one of the corners of a pane.
The CEA shall verify that each fenestration product has a permanent marking from the same verifier as shown on the temporary label. A product that does not have such a permanent marking in addition to the temporary label is not verified, and does not comply with the By-law.
Products may comply with the By-law under a "flexibility provision" and demonstrate compliance with an energy performance certification accompanied by supporting documentation. This provision may be used to establish and report the average overall U-value of all the fenestration products in the home. This provision also provides a path by which a designer can provide “suitable documentation” of U-values for products that cannot be labeled because they are outside the scope of existing energy performance certification programs. Such products include site glazed windows, doors, curtainwalls and sloped glazing assemblies, as well as factory glazed curtainwalls and window wall assemblies. Under the flexibility provision, a qualified registered professional may determine the U-value of one or more individual fenestration products or assemblies by means of an energy performance certification.
The energy performance certification shall be affixed to a prominent fenestration product at the jobsite in a visible location. The CEA shall remove the energy performance certification and submit it to the City with the [insert name] inspection report.
The energy performance certification should include the following:
  1. A cover letter on the professional’s letterhead that includes:
    1. The professional’s identity and contact information.
    2. The physical and legal addresses of the building.
    3. The area weighted overall average U-value of all the fenestration in the building (where applicable).
    4. A verification by the professional that the information provided in the energy performance certification and accompanying documentation supports the U-value of the fenestration assembly or assemblies identified in the report.
    5. The name, address and contact information of the fenestration product supplier(s).
    6. The name, address and contact information of the glass supplier, if different from the fenestration product supplier.
    7. The name, address and contact information of any individuals or firms that carried out energy performance simulations, if different from the professional.
    8. A complete list of the supporting documentation attached to the letter.
    9. The professional��s seal and signature.
  2. An attached documentation package that includes:
    1. A list of each fenestration product type, quantity, size, area, description, and NFRC 100-2010/CSA A440.2-09 U-value.
    2. The sizes and configurations of the simulated products as shown by frame elevations and/or shop drawings, keyed to the list.
    3. A table of the area-weighting calculations performed to determine the overall average U-value (where applicable).
    4. A description of each framing system used, including manufacturer name, series, and model numbers, as well as frame material and any internal reinforcing used.
    5. A complete description of the glazing, including overall glass thickness, number of panes, pane thicknesses, gap widths, low-E coating manufacturer and type, low-E coating emissivity, and surfaces to which coatings are applied, type of gap fill with percentages of inert gas, complete description of spacer by make, series, and model, and its constituent materials, and insulating glass edge sealant materials.
    6. Isotherms for each unique framing member used in each system covered by the letter (heads, sills, jambs, mullions).
A-10.2.2.12.(2) [Deleted.]
A-10.2.2.15.(4) Exterior Fireplaces
Exterior fireplaces connected to building services are to be considered a part of that building for the purposes of meeting the energy targets of Part 10 of the Building By-law. The expectation is that buildings incorporating such features are to be designed under the modelling path.
A-10.2.2.21. Alternative to the Prescribed Air Change Requirements
Acceptance of Division B Sentence 10.2.2.21. may be obtained by demonstrating that the dwelling has been sealed according to good engineering practice. Prior to the insulation inspection stage, a Certified Energy Advisor (CEA) must perform a visual inspection of the dwelling and provide the Chief Building Official with a letter of assurance with the CEA’s signature indicating that the dwelling has been sealed according to good engineering practice based on a visual inspection. The CEA’s letter must be accompanied with a completed "Energy Star Thermal Bypass Checklist" or a thermal scan of the dwelling identifying locations of air leakage or a pre-drywall blower door test.change end

contentHistory

change beginA-10.2.3.1. Electric Vehicle Charging for Buildings
The Canadian Electrical Code, Part I contains the requirements of electric vehicle charging systems, the requirements of Rule 86-300(2) and (3) recognize the use of load management technologies via the manual transfer or automated control in a branch circuit that supplies the electric vehicle supply equipment load and other loads. This Rule requires that, where the electric vehicle supply equipment load and other loads are installed, only one load can be operated at any one time and the branch circuit must be based on the calculated demand in accordance with Section 8.
All references to the electrical installation including receptacle, supply equipment and rating of voltage and ampere in Article 10.2.3.1. are intended to align with the requirements of SAE AC Level 2 charging requirements, whether in applying load managed solutions or separate branch circuits for each charging point. In addition to the requirements of Article 10.2.3.1., the installation of electric vehicle charging systems and electric vehicle supply equipment must meet the requirements of the Canadian Electrical Code, Part I and the manufacturer’s instructions.change end
change beginA-10.2.3.2.(2) Thermal Energy Demand Intensity (TEDI)
TEDI does not include receptacle loads and energy use from unusual uses such as spas and computer server rooms.
A-10.2.3.3.(2) Energy Model Calculations for Step 1
Although the total energy use intensity and thermal energy demand intensity are not required for NECB conformance, they must still be calculated in conformance with Article 10.3.1.4. and reported in accordance with Subsection 2.2.9..
A-10.2.3.4.(1)(a) and (2) Energy Model Calculations for Steps 2 to 4
Notwithstanding the requirements of Part 8 of the NECB, a reference building and building energy target are not required for compliance with the requirements of Steps 2 to 4 in Article 10.2.3.3. The performance requirements of Table 10.2.3.3.A and Table 10.2.3.3.B are used to determine compliance.
A-10.2.3.4.(3) Air Leakage Rate in Energy Model Calculations
The requirement to account for the air leakage rate as tested in all energy model calculations, other than for Step 1 buildings, supersedes the NECB, which permits an assumed air leakage value of 0.25 L/(s⋅m2) to be used for energy model calculations. For buildings that must conform to the requirements of any of Steps 2 to 4, higher than expected air leakage may require the building design to be altered and the energy model calculations to be repeated. Alternatively, the air leakage rate could be retested after making alterations to the air barrier system to attain the desired air leakage rate.
A-10.2.3.4.(3) Air Leakage Rate in Energy Model Calculations for Step 1
Although the air leakage rate as tested of the building need not be used for the purposes of conforming with Part 8 of the NECB and Sentence 10.2.3.4.(2), Article 2.2.9.1. requires that the air leakage rate as tested be used in the calculation of the total energy use intensity and thermal energy demand intensity for reporting purposes on the drawings and specifications. This will typically require Step 1 energy model calculations to be redone after the airtightness test. It is not intended that the results of the airtightness test for buildings that must conform to the requirements of Step 1 influence the compliance of the building with Article 10.2.3.3.
A-10.2.3.4.(3) Air Leakage Rate
The air leakage rate of 0.25 L/(s⋅m2), which is a typical infiltration rate at 5 Pa, is for calculation purposes and may not reflect the real rate encountered under actual operating conditions; it is based on assumed typical operating pressure differentials.
A-10.2.3.5.(1) Building Airtightness Testing Requirements
The intent of this testing is to quantify the airtightness level of the air barrier system, not airtightness of the building at in-service operating conditions.change end