The Toronto Green Standard (TGS) is a tiered set of performance measures with supporting guidelines for new development. The standard promotes sustainable site and building designs that address air quality, greenhouse gas emissions, energy efficiency, water quality and efficiency, solid waste and ecology objectives for new developments in the City of Toronto.
The Design Development Stage Energy Report (DDSER) is aligned with design stage drawings, information, and reports available during Site Plan Control Application (SPA). At this stage, it is understood that some of the building design specific details about the various equipment and other required inputs are not finalized. The DDSER generally involves the measures related to the Building Configuration, Orientation, Building Envelope, Glazed Area, Solar Control, System Selection along with Major Mechanical and Electrical Energy Decisions. cove.tool makes this process simple and automated!
Following steps show how cove.tool can help with the parameters listed above for DDSER submission:
1. Building Configuration:
Shape and surroundings of any building plays a very import role in governing the energy consumption in any building. The 3D geometry tab in cove.tool enables user to perform daylight and glare analysis for various building configurations in minimal amount of time.
The users can change the orientation of the building within cove.tool to see it's impact on energy. If users are importing the geometry from plugins (Rhino/Grasshopper, REVIT, SketchUp), the orientation for the model will be reflected in cove.tool automatically.
3. Building Envelope:
The envelope details can be imported from one of the supported plugins, manually configured in the geometry page or imported from the drawing tool. The properties of various envelope parameters are selected automatically by cove.tool according to the applicable code. These can be easily edited by the user to see their impact on overall energy use of the building.
4. Glazed Area:
The glazed area of a building can be edited in cove.tool via the geometry page. The glazing area can be switched to percentage as well.
5. Solar Control, such as External Shading Devices:
The solar control strategies such as interior and exterior shades can be modeled in cove.tool via the Baseline Energy > Engineering Inputs > Envelope > Blinds/Curtains/Shades.
6. System Selection and Major Mechanical and Electrical Energy Decision:
The major mechanical and electrical energy decisions along with system selection can be reflected in cove.tool via Baseline Energy > Engineering Inputs > Building System & Usage and Schedules
The submission of an energy model at Site Plan Control Application (SPA) provides an important initial indication of a project's ability to meet the TGS requirements. It is expected that the project's performance as modeled at SPA will be maintained(or improved) throughout the remainder of the design and construction process. It is important to note that buildings greater than 2000 m2 (21,527.8 ft2) are required to submit a Design Development Stage Energy Report (DDSER) at SPA for TGS v3 compliance.
Important takeaway here is realizing the practices which were considered ambitious in the past will become standard practices in the days to come. It shouldn't be a surprise if all energy codes will soon require an early stage energy modeling report submission to hit the rigorous energy usage intensity (EUI) targets.