Create a graphical representation of your building by entering one or more “blocks” to your building. Blocks may be combined to define the general footprint and shape of a building. The TSPR tool is designed to permit modeling a building with multiple blocks that represent building areas with distinctly different energy assets or physical configurations.
Block Guidelines for TSPR Buildings
Most buildings can and should be considered as one block. Create additional blocks if any of the following situations apply:
- The building is a mixed-use building. Each block can have only one occupancy type (office, library, education, or retail). Create an additional block for each unique use type. The general guideline is to create a unique block for a use type only when the area of the use type is >2% or 2000 ft2(whichever is smaller), of the GFA of the TSPR building being analyzed. For example:
- For a building with 50,000 ft2 Office, 1200 ft2 Retail, 2 separate blocks will be created for Office and retail as retail is 2.4% of the GFA.
- For a building with 50,000 ft2 Office, 500 ft2 Retail, 2 separate blocks are not required, and retail portion can be analyzed as office (unless one of the exceptions listed below applies).
- The portion of the building is served by different HVAC systems. Each block can be served by only one type of HVAC system. Therefore, a single block shall be created for each unique HVAC system and use type combination. Multiple HVAC units of the same type may be represented in one block. Guidance for entering efficiencies for multiple HVAC systems is provided in the Plants, Air Handler and Zone Equipment sections.
- The building footprint cannot be simplified by the available basic footprint shapes (see block inputs).
- The building has areas with different numbers of floors (e.g., one portion of the building is 3 stories and another portion is 10 stories), or floor heights. Each block can have a single definition of floor-to-floor or floor-to-ceiling height. Where floor heights differ by more than two feet, unique blocks should be created for the floors with varying heights.
- The building has both above grade and below grade floors. Each block can include either above grade or below grade floors. For buildings with both above grade and below grade floors, separate blocks should be created for each. For buildings with floors partially above grade and partially below grade, if the total wall area of the floor(s) in consideration is greater than or equal to 50 percent above grade, then it should be simulated as a completely above grade block, otherwise it should be simulated as a below grade block.
- The building has walls with different fenestration types. Each wall on a façade of a block shall have similar vertical fenestration. Each wall on a façade of a block shall have similar vertical fenestration. The product of the proposed design U-factor times the area of windows (UA) on each façade of a given floor cannot differ by more than 15 percent of the average UA for that façade in each block. The product of the proposed design SHGC times the area of windows (USHGC) on each façade of a given floor cannot differ by more than 15 percent of the average USHGC for that façade in each block. If the conditions specified in the WSEC are not met, then additional blocks shall be created consisting of floors with similar fenestration.
For a building model with multiple blocks, the blocks should be configured together to have the same adjacencies as the actual building design.
Create a New Block
- Select the Add (plus) icon from the left-hand sidebar.
- Assign a name to your block.
- Enter geometry and footprint dimensions.
- Click the Create Block button to save your entry.
An iconic representation of the building block will be displayed on the Building Project Workspace screen.
Edit an existing block
- Select the blue Edit link under the Block name of the block you wish to edit, as displayed on the left-hand sidebar.
- Click the Update Block button to save your changes.
- Remove a Block by selecting the yellow trash can icon.