HDClimatic V9.5 ASHRAE Climatic Design Data Lookup

HDClimatic 9.5 has just been released (Summer 2026). This is a total rewrite of our ASHRAE climatic design data software tool that completely revamps the user interface, making it more user friendly and, of course, it includes a slew of new features including the following major updates:

  1. Now includes the full 2025 ASHRAE Handbook of Fundamentals climatic design database — roughly 12,000 stations across 231 countries and territories — alongside the 2009, 2017, and 2021 editions for reference.
  2. A new cascading Country / State-Province / City search, plus a free-text station search box, makes finding a location instant.
  3. A built-in psychrometric engine automatically derives dry-bulb, wet-bulb, dew point, humidity ratio, enthalpy, and specific volume for every design condition.
  4. Totally revamped user interface that accommodates all manner of screen resolutions and scaling, plus a one-click "Apply to Project" hand-off to HD PsyChart.
At its core, HDClimatic puts the ASHRAE Handbook of Fundamentals climatic design conditions you need for heating and cooling load calculations right at your fingertips — no more flipping through printed or PDF Handbook tables. Select a country, state/province, and city (or just search by name) and HDClimatic instantly returns the full station design-condition record: winter heating design dry-bulb, summer cooling design dry-bulb/wet-bulb, evaporation design wet-bulb, dehumidification design dew-point, extreme wind speeds, extreme annual temperatures, and economizer hours — all at the standard ASHRAE percentiles (99.6%/99% heating; 0.4%/1%/2% cooling, evaporation, and dehumidification).

HDClimatic also derives the complete psychrometric state point — dry-bulb, wet-bulb, relative humidity, dew point, humidity ratio, enthalpy, specific volume, density, and vapor pressure — for every design condition, so you don't need a separate psych chart lookup. When launched from HD PsyChart, HDClimatic can push a selected design condition straight into your project with one click.

Both IP and SI units are fully supported, with instant one-click switching between unit systems.


KEY FEATURES OF HDCLIMATIC

  • Massive built-in weather-station database spanning four ASHRAE Handbook of Fundamentals editions: 2009, 2017, 2021, and 2025
  • 2025 edition coverage of roughly 12,000 stations across 231 countries and territories — truly global climatic design data
  • Cascading Country / State-Province / City search, plus a free-text station search box
  • Full ASHRAE design condition set per station: winter heating (99.6% / 99%), summer cooling dry-bulb/wet-bulb (0.4% / 1% / 2%), evaporation design wet-bulb, dehumidification design dew-point, extreme wind speeds, extreme annual dry-bulb max/min, and economizer hours
  • Station header data including WMO station number, latitude/longitude, elevation, station pressure, UTC offset, time zone, and period of record
  • Built-in psychrometric engine that derives the full air-property state point for every design condition automatically
  • Show/hide toggles for Cooling/Evaporation/Dehumidification, Winter Heating, and Wind sections
  • "Apply to Project" hand-off that pushes a selected design condition directly into HD PsyChart
  • One-click IP (Imperial) / SI (Metric) unit switching for every input and result field
  • Professional PDF report generation with print preview, direct printing, and copy-to-clipboard export
  • Persisted user preferences — remembers your last-selected location, units, and display options between sessions
View more app screenshots here.

  • HDClimatic - Location Search
  • HDClimatic - Cooling Design Conditions
  • HDClimatic - Wind Design Data
  • HDClimatic - Metric (SI) Units
  • HDClimatic - PDF Report

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