The TSPR report is composed of the following sections:
- Whole Building TSPR Results and Submitter Information
- Building Envelope Information
- Whole Building Energy Use Summary
- Building Block Characteristics Summary
- HVAC System Information and Energy Use Summary
- Baseline HVAC System Description
- Mechanical Equipment Schedules
Whole Building TSPR Results and Submitter Information
The first page of the TSPR report displays the whole building TSPR results for the proposed and baseline building, basic building information, a statement of TSPR code compliance and the submitter’s name and organization.
Building Information – The building information displayed at the top of the report includes the building name as entered into the tool; building address; building use type (displayed as "Mixed-Use" if more than one use type has been entered); gross floor area entered by the user; year of construction; the date the building was scored; and a building ID# generated by the tool.
Whole Building Total System Performance Ratio – The proposed and baseline building TSPR are displayed, along with a statement of compliance with the 2018 Washington State Energy Code (WSEC).
Total System Performance Ratio (TSPR) is the ratio of the sum of a building’s annual heating and cooling load in thousands of BTUs to the sum of the annual carbon emissions in pounds from energy consumption of the building HVAC systems. To comply with the WSEC, the proposed building TSPR must be greater than or equal to the baseline system TSPR.
Submitted By – The name, email, organization and phone number of the person responsible for submitting the TSPR report for compliance are displayed.
Building Envelope Information
Building Surface Area Summary – The total gross wall and window areas, and the window to wall ratio for the whole building are automatically calculated and displayed based on the block and window dimensions entered.
Note: The total gross wall area includes both opaque and glazed wall area. The window area includes all vertical fenestration, including curtainwall and storefront.
The gross wall and window areas for surfaces by orientation are automatically calculated and displayed.
Whole Building HVAC Energy Summary
Two tables summarizing the estimated energy use as calculated by the tool are displayed in tables for both the proposed and baseline buildings. These tables include the sum of the energy use for all of the HVAC systems present and assigned to blocks.
Whole Building Annual HVAC Site Energy Use by End-Use
HVAC Energy Use by End Use - Estimated annual site energy use is displayed in kWh for electricity and in Therms for natural gas for the following six end uses listed below. Energy use for all end uses are summed and displayed as the total for all HVAC energy use.
- Heating – energy use for all heating sources present in the building
- Cooling – energy use for all cooling sources present in the building
- Fans – energy use for all fans present in the building
- Pumps – energy use for all pumps present in the building
- Heat Rejection – energy consumed by heat rejection equipment such as cooling towers
- Heat Recovery – energy consumed by heat recover systems such as Energy Recovery Ventilators (ERV)
Total HVAC Energy Use (kBtu) - Total HVAC energy use is converted to kBtu and is displayed here.
Total HVAC Carbon Emissions (lbs) – Total HVAC energy use is converted to a carbon emissions value by multiplying site energy consumption by the carbon emission factors outlined in Table C407.1 of the Appendix D of the WSEC.
In the example below, the proposed building uses an estimated 438,851 kBtu of site energy and generates an estimated 81,034 lbs of carbon emissions. The baseline building uses an estimated 462,481 kBtu of site energy and generates an estimated 94,809 lbs of carbon emissions.
Whole Building Annual HVAC Heating and Cooling Loads
The annual heating and cooling loads for the building are determined by the simulation program. The heating and cooling loads are then summed, and this total is divided by the HVAC carbon emissions values to determine the TSPR.
In the example below, the whole building HVAC heating and cooling loads total 1,017,585. When divided by the carbon emissions, the proposed building has a TSPR of 12.6 and the baseline building has a TSPR of 10.7. The TSPR for the proposed building is higher than the TSPR for the baseline building. Therefore, the proposed building complies with the 2018 Washington State Energy Code.
Building Block Characteristics Summary
A list of the building data inputs that have been entered into the model by the user, used to generate the TSPR score are displayed in a "building systems characteristics" summary on Building Information pages for each block as a reference.
HVAC System Information and Energy Summary
A list of the HVAC system data inputs that have been entered into the model by the user are displayed in a HVAC information summary for each assigned HVAC System as a reference.
TSPR values for the proposed HVAC system and the baseline HVAC system, as well as energy use by end-use and annual heating and cooling load tables are displayed. If only one HVAC system is present and assigned to blocks, the values listed in these tables will be the same as the tables in the Whole Building Energy Summary.
Note: The Building Block Characteristics Summary and the HVAC System Information and Energy Summary are grouped by shared Primary and Cooling systems.
In the example below, 2 office blocks are served by the same Packaged Single Zone Gas Furnace (PSZGF) and separate DOAS systems. The system TSPR is be generated for the PSZGF System assigned to the two blocks and includes the energy use for the PSZGF and both of the DOAS systems.
Baseline HVAC System Description
This section documents the baseline HVAC system which is added by the TSPR tool for the baseline simulation run and used to compare to the proposed HVAC Systems. A list of the data inputs for the baseline HVAC system generated and assigned by the model are displayed in a HVAC System summary as a reference (see example below).
See also Appendix D of the WSEC, available at: https://sbcc.wa.gov/state-codes-regulations-guidelines/state-building-code/energy-code.
Mechanical Equipment Schedules
Mechanical Equipment Schedules are displayed at the end of each TSPR report for reference. The tables include entries for all of the HVAC equipment entered for a building,
Note: The Cooling System, Heating System, and Fan System Information entries from the mechanical equipment schedules for Air Handlers and Zone Equipment appear in separate tables for each Equipment ID due to the size limitations of the pdf report.