Building energy estimation methodology

C873 SERIES-15 contains:

C873.0-15 - Building energy estimation methodology — Part 0 — Definitions and general requirements for the calculation of energy loads, energy consumption, and source energy for heating, cooling, ventilation, domestic hot water, and lighting in buildings

1.1
This Standard specifies general requirements such as reference publications, definitions, abbreviations, symbols, and subscripts used in the other Standards in the CSA C873 Series.

1.2
This Standard is intended to be used in conjunction with the other Standards in the CSA C873 Series to form a complete Standard.

1.3
In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
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C873.1-15 - Building energy estimation methodology — Part 1 — General balancing procedures, terms and definitions, zoning, and evaluation of energy types

1.1
This Standard covers the procedures for calculating the energy loads, energy consumption, and source energy for heating, cooling, lighting, and the domestic hot-water supply of buildings.

1.2
This Standard describes the overall calculation procedure.
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C873.2-15 - Building energy estimation methodology — Part 2 — Energy loads for heating and cooling of building zones

1.1
This document specifies methods of calculating the energy loads for heating and cooling of the section of the building being assessed. The calculations are based on a specific zone of the building defined according to its intended use.

1.2
This Standard describes procedures that are suitable for calculating the energy loads for heating of building zones which have only heating, as well as the energy loads for heating and cooling of building zones which are served by both heating and cooling systems.
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C873.3-15 - Building energy estimation methodology — Part 3 — Energy loads for conditioning air

1.1
This Standard determines the energy loads for thermal air conditioning (useful energy), as well as the energy consumption for air transport in ventilation and air-conditioning systems (HVAC systems) that partly use external air.

1.2
This Standard provides a methodology to determine the energy loads of ventilation systems and air-heating systems for non-residential buildings.

The calculation procedure described in this Standard allows for the evaluation of the heating, cooling, and humidification loads for a large variety of conventional ventilation arrangements. For special system designs not covered by this procedure, the heating, cooling, and humidification loads must be directly calculated using an hourly analysis.
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C873.4-15 - Building energy estimation methodology — Part 4 — Energy consumption for lighting

1.1
This Standard specifies a method of verifying the monthly and annual energy consumption for lighting in non-residential buildings.

1.2
This Standard provides a methodology for calculating the electrical energy consumption of the electrical lighting system, as well as accounting for daylighting.
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C873.5-15 - Building energy estimation methodology — Part 5 — Energy consumption for heating systems

1.1
This Standard determines the energy consumption of the heating systems and their subsystems (control and emission, distribution, storage, and generation).

1.2
This Standard provides a methodology for calculating the energy consumption for heating provided to the air-handling system, zone coils, and absorption chillers. The auxiliary energy and the uncontrolled internal heat gains from the heating system are also calculated.
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C873.7-15 - Building energy estimation methodology — Part 7 — Energy consumption for air-handling and air-conditioning systems

1.1
This Standard provides a method of calculating energy consumption for heating, ventilation, and air-conditioning systems.

1.2
This Standard specifies requirements for materials, quality of work, dimensions, sustained pressure, environmental stress cracking, and markings.
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C873.8-15 - Building energy estimation methodology — Part 8 — Energy consumption for domestic hot-water systems

1.1
This Standard describes the calculation of energy consumption of domestic hot-water systems and their subsystems (control and emission, distribution, storage, and generation).

1.2
This Standard provides a methodology for calculating the energy consumption for domestic hot-water heating. The auxiliary energy and the uncontrolled internal heat gains from the domestic hot-water heating system are also calculated.
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C873.9-15 - Building energy estimation methodology — Part 9 — Energy consumption and source energy for combined heat and power plants

This Standard describes a calculation procedure to determine the energy consumption for heat generation in a process involving cogeneration or combined heat and power plants.
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C873.10-15 - Building energy estimation methodology — Part 10 — Boundary conditions of use — Climatic data

This Standard specifies the boundary conditions for non-residential buildings and provides reference climatic data for Canada.