HDPsyChart V9 World's #1 Psychrometric Chart Software

The brand new HDPsyChart Version 9 Windows desktop application has just been released in the spring of 2025. This version includes over 40 updates and bug fixes to Version 7, the most popular psychrometric chart software in the world. Just some of the updates include:

Added ASHRAE data zones from the 2015 and 2021 “Equipment Thermal Guidelines for Data Processing Environments – ASHRAE TC 9.9 Reference.”
Added world-wide ASHRAE climatic data from the 2017 and 2021 ASHRAE Handbook of Fundamentals. For 2017, weather data for over 8000 cities were added. For 2021, weather data for over 9100 cities were added.
Added 2023 U.S. TMY3 weather data from the Climate.OneBuilding.org database that includes 8760 hourly data for 1000s of cities in the U.S.
Added comfort data from ASHRAE Standard 55-2017 and 2020.
Added additional ASHRAE ventilation data that includes data from ASHRAE Standard 62.1-2016 and 2019
Includes a brand new feature called "templates" that allow you to store an unlimited number of psychrometric chart look-and-feels.
For a complete list, click here.

This software tool includes the same basic functionality that allows for complete psychrometric and process analysis, all graphically displayed on beautiful charts with unmatched accuracy. It also provides a professional state point and process report detailing all of the psychrometric and process values. Both IP and SI units are fully supported by HDPsyChart.

For information on the HDPsyChart V9 subscription package, click here.

Are you interested in a branded or white-labelled version of HDPsyChart? Over 400 companies world-wide have white-labelled our software which includes custom logo, coloring, and more. Click here for more information.

There are several versions of the HDPsyChart V9 available to you. The Pro version is the most comprehensive version. The Standard version includes a subset of the Pro version functionality and is great for basic psych chart plotting. The OEM version is the same as the Pro version but includes your company's logo and color-scheme. We also offer the Akton Psychrometric Chart version 7.0 (we will be updating to Version 9 soon) that is the same as the Pro version but includes much lower and higher temperature ranges. Click here for more information.

See the chart below for specific differences between the 3 versions.

	Professional	OEM	Standard
Works on 32- and 64-bit machines
Allows for full psych chart customization
Includes allowances for elevation from 0 to 12000 ft
Includes 20+ additional HVAC calc programs listed here
Allows you to export the chart to PDF
Allows you to create Excel outputs listing all points and processes
Allows you access to ASHRAE, TMY2, and TMY3 weather data for plotting bin weather data and more
Includes your company logo and color-scheme

Process Analysis Capabilities

ASHRAE datacenter zones from 2019 thermal guidelines
ASHRAE standard 55-2020 comfort zones
Re-arrange or re-order points on the fly with one button click
2023 TMY3 bin weather worldwide data
Ability to select days per week for bin weather data & plots
HDClimatic data from 2017 and 2021 ASHRAE Handbook of Fundamentals
Import your own weather data file locations into the chart
Optional process directional arrowheads on process lines
Ability to print-all or PDF-all (psy+flow+report) into one file
Cooling coil apparatus dew point (ADP) calculator
Cooling coil air bypass factor (ABF) calculator
Air mixing algorithm with both mass and energy balance
Auto flow chart diagram
Individual process line color control
Individual point color, shape and size control
Winter "v" air mixing capability with condensation
Fog region property display
Constant h, WB, HR, DB line control

Presentation Control

Create chart "templates" that allow you to store an unlimited number of different types of chart looks-and-feels.
Ability to turn logo on & off, for ashrae meeting “generic” presentations
Customize psychrometric charts with your own colors
Change any chart property lines to any color you choose
Change any chart property lines to any line type you choose
Change any chart property lines to any line thickness you choose
User-defined custom area shading right on the chart
Updated ASHRAE 55-2020 comfort zones
Ashrae class 1 through 4 datacenter zones (allowed & recommended)
Nebs datacenter zones (allowed & recommended)
Optional process directional arrowheads on process lines
Ability to specify weather plot data point colors
Ability to specify weather plot data point size
Ability to hide state point label on a point-by-point basis
Draw your own lines anywhere you want
Draw your own ellipses anywhere you want
Draw your own rectangles anywhere you want
Draw your own circles anywhere you want
Insert your own pictures anywhere you want
Humidity ratio unit of measure control
Mouse cross-hair or target control
Cooling coil performance line control
Page color control
Chart area color control
Black & white <=> color display & print control
Heading on/off control
Outline on/off control
Zoom window control

Data Exchange

Point color control when importing data from Excel (*.csv) files
Point size control when importing data from Excel (*.csv) files
Process line color control when importing data from Excel (*.csv) files
Process line thickness control when importing data from Excel (*.csv) files
Import your own weather data file locations into the chart

Additional Capabilities

Specify exact directories where you want projects, output files, templates, and weather files stored.
20 different languages on charts and reports with one button click
Note displaying capabilities
Apparatus dew point (ADP) to cooling coil leaving air calculator
Air bypass factor (ABF) to cooling coil leaving air calculator
Point property toolbar display includes units of measure
Thermal comfort terms definition PDF manual
Air density property calculation
High pressure capability up to 100 PSI
Auto-altitude change with climatic location selection
Fog region thermo-physical property display