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What's New in HAP v4.5

HAP v4.5 was released in March, 2010. The following is intended for readers who are familiar with HAP v4.4 or earlier versions and are interested in learning about changes in HAP v4.5. Noteworthy changes are summarized below and are then described in more detail for the major functional areas of the program.

Key Changes:
  • Expanded features for performing LEED® Energy and Atmosphere Credit 1 Analysis for both LEED® 2009 and LEED® NC-2.2.
  • Expanded features for performing quick energy analyses.
New LEED EAc1 Features:
  • Project Preferences Expanded the Project Preferences feature to allow you to specify the Energy Standard (ASHRAE 90.1-2004 or ASHRAE 90.1-2007) and the LEED Rating System (LEED NC-2.2 or LEED 2009) which applies to your current project. HAP automatically adapts its calculations and report formats to your specified preferences. Specifically, the Energy Standard preference affects Appendix G baseline fan power allowance calculations and the auto-calculation of ASHRAE 90.1 minimum equipment efficiencies. The LEED Rating System preference affects the format and content of the LEED Summary Report.
  • Equipment Efficiencies. Added a feature to automatically calculate the required ASHRAE 90.1 minimum equipment efficiencies based on your Energy Standard project preference (90.1-2004 or 90.1-2007). Currently this feature applies to DX cooling, heat pump heating and furnace heating equipment. This feature is useful when modeling the baseline buildings required in a LEED EA Credit 1 analysis.
  • Baseline Fan Power Allowance. Added features for automatically calculating the baseline fan power allowance per ASHRAE Standard 90.1-2007.
  • LEED EA Credit 1 Summary Report. Revised this report to adjust its format and content based on your stated project preference for the LEED Rating System - either LEED NC-2.2 or LEED 2009. The report imitates the format and content of key tables in the on-line submittal template for this credit.
  • SEER and HSPF. Added features to allow equipment performance to be defined in terms of SEER and HSPF.
  • Building on Existing Features. All of these new features build on existing LEED-oriented features in HAP to make you more productive in performing the EA Credit 1 analysis. These existing features include the LEED EA Credit 1 Summary Report, automatic duplication of the proposed building and all its contents as a starting point for constructing the baseline building, automatic production of the baseline building rotations, autosizing of equipment capacity, baseline fan power allowance calculations, baseline VAV fan performance curve, water flow input units as gpm/Ton, pump power input units as W/gpm and fan power input units as W/CFM.
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Features for Performing Preliminary or Schematic Design Analyses:
  • Full Wizard Session. Expanded the Full Wizard Session feature to include wizards for quickly defining weather data and utility rates. With these additions, you can now configure 100% of the data needed for a schematic energy analysis in just minutes. This makes screening HVAC design alternatives in the early stages of design fast and efficient.
  • Weather Wizard. This new wizard allows weather data to be quickly selected by one of two approaches: (1) graphically by clicking on countries, states/provinces and cities in map images, or (2) by selecting from drop-down lists.
  • Utility Rate Wizard. This new wizard makes entry of electric and fuel pricing data easier. Simple pricing data for electricity and fuels can be defined all on one input screen. For detailed electric rates, the wizard guides you through the rate definition, eliminating much of the uncertainty users normally face when defining this data.
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Full Summary List of Enhancements in v4.40:
  • 1. Main Window
    • Expanded Project Preferences to include Energy Standard (90.1-2004 or 90.1-2007), LEED Rating System (NC-2.2 or 2009) and currency.
    • Upgraded "gbXML Import" feature to more efficiently work with files from AutoDesk Revit MEP 2010 and eliminate failures seen in prior versions when importing gbXML from this source.
    • Expanded Help Menu to include User's Manual and links to web-based support and training information.
    • Converted program to use HTML-help format for compatibility with Windows 7 and Windows Vista.
    • Added "What's New" pop-up window which appears at program startup.
    • Revised report "save as RTF" feature to remember destination folder you specify.
    • Added a template project which contains ASHRAE 90.1 default schedules and current EIA commercial sector electric and gas prices for all 50 US states and the District of Columbia.
  • 2. Wizards
    • Expanded Full Wizard Session to include Weather and Utility Rate Wizards.
    • Added new Weather Wizard for rapid specification of weather data.
    • Added new Utility Rate Wizard to simplify specification of energy and fuel price data.
  • 3. Weather
    • HAP v4.5 automatically installs the full simulation weather library, eliminating the need to manually copy files to your computer.
  • 4. Air Systems
    • Added feature to automatically determine ASHRAE 90.1 minimum equipment efficiencies for DX cooling, heat pump heating and furnace heating equipment.
    • Added ability to specify and calculate baseline fan power allowance per ASHRAE 90.1-2007 section G3.1.2.9.
    • Added feature for defining equipment performance in terms of SEER and HSPF.
    • Revised air system defaults to better match commonly used DX equipment settings and heating design supply air temperatures.
  • 5. Plants
    • Revised input screen validation procedures to make it easier to define chilled water plants.
    • Revised the algorithm for DX free cooling in air-cooled chillers.
  • 6. Buildings
    • Revised the LEED EA Credit 1 Summary Report to display in LEED NC-2.2 or LEED 2009 format based on your project preference.
    • Revised the calculation of LEED unmet cooling and heating hours to comply with definitions in ASHRAE 90.1-2007.
  • 7. Cooling Towers
    • Changed "River, Sea or Well Water" option to "Geo, Well or Surface Water" to make the use of this option clearer.
  • 8. Utility Rates
    • Made currency a project-level preference so it only has to be defined once per project.
    • Revised the emission analysis feature to consider CO2e (CO2 equivalent).
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