GITNUXSOFTWARE REVIEW
Science ResearchTop 10 Best Psychrometric Software of 2026
Top 10 roundup compares psychrometric software options like EES and helps engineers shortlist tools for HVAC, testing, and thermal calculations.
How we ranked these tools
Vendors set the topic, but our editors set the inclusion criteria and the evaluation framework before research starts.
Search agents gather the source set and the review record, including transcriptions of video reviews and podcasts.
Framework: Features 40% · Ease 30% · Value 30%
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Carmel Software Psychrometric is the best pick for engineers who need fast psychrometric what-ifs because it pairs rapid state-point entry with conditioning process path overlays that update from your defined points, while EES is a strong alternative for equation-driven teams since state points and performance metrics come from the same solvable model.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Carmel Software Psychrometric
Built-in conditioning process path overlays tied to manually defined state points for rapid what-if psychrometric reasoning.
Best for: Fits when engineers need quick psychrometric state-point and process-path overlays for air-handling analysis.
Hands Down Software
Editor pickWorksheet session reuse tracks inputs across conditioning-path iterations with consistent outputs for review cycles.
Best for: Fits when HVAC teams need worksheet-driven psychrometric process comparisons with repeatable exports.
EES
Editor pickEES equation-solving lets psychrometric state points and performance metrics come from the same user-defined model.
Best for: Fits when engineers need equation-based psychrometric calculations and batchable conditioning process path checks.
Comparison Table
Carmel Software Psychrometric
vertical specialistPsychrometric calculation apps for mobile and desktop from Carmel Software.
Built-in conditioning process path overlays tied to manually defined state points for rapid what-if psychrometric reasoning.
Carmel Software Psychrometric is a psychrometric charting and property-calculation tool built for HVAC and process work, with a workflow geared toward reading state points and conditioning paths. It supports standard psychrometric quantities used in air-handling analysis, including humidity ratio, dry-bulb temperature, and wet-bulb temperature.
The practical focus is on generating and interpreting psychrometric state points and process overlays rather than on general thermodynamics research. The product also supports SI and IP unit switching and barometric-pressure handling for altitude-adjusted work.
- +Fast state point entry with chart-ready outputs for HVAC design workflows
- +Altitude-adjusted psychrometrics via barometric pressure inputs
- +Clear unit switching for SI and IP calculations and displays
- +Conditioning process path overlays for mixed-air and coil-style reasoning
- –Limited evidence of an integration and API surface for external energy models
- –Extensibility and data model controls are not apparent from core workflow
- –Less emphasis on BIM or IFC export in the core toolchain
- –Thermodynamic engine depth is narrower than REFPROP-style integrations
HVAC designers
Plot state points on psychrometric chart
Faster chart-based checks
Air quality engineers
Evaluate conditioning paths for dehumidification
Clear process path results
Show 2 more scenarios
Facility engineers
Apply altitude-adjusted psychrometrics
Consistent site calculations
Correct properties using barometric-pressure handling for site-specific operating conditions.
Process engineers
Switch SI and IP units
Reduced unit conversion errors
Convert psychrometric inputs and outputs between unit systems for standardized workflows.
Best for: Fits when engineers need quick psychrometric state-point and process-path overlays for air-handling analysis.
Hands Down Software
vertical specialistPsychrometric charting software for process and HVAC applications.
Worksheet session reuse tracks inputs across conditioning-path iterations with consistent outputs for review cycles.
Hands Down Software is designed around worksheet sessions that reuse inputs across multiple psychrometric state points and conditioning paths, which helps when cooling and dehumidification sequences must stay consistent. The core workflow supports dry-bulb temperature, humidity ratio, and dew point based calculations with barometric pressure correction inputs when altitude affects the air state. Results can be captured in exportable formats so the same scenario definitions can be referenced in reports and review cycles.
A practical tradeoff is that deep thermodynamic-property customization and third-party property-engine swapping are not the center of the product experience, so teams that require REFPROP parity may find gaps. A common usage situation is a design review cadence where engineers iteratively adjust mixed air conditions, coil operating assumptions, and bypass-style relationships to converge on a conditioning process path and load narrative.
- +Worksheet reuse keeps multi-scenario assumptions consistent across design iterations
- +Graph overlays support rapid conditioning-path comparison during coil tuning
- +Exports support repeatable documentation from the same air-state inputs
- +Altitude-aware inputs reduce correction errors in site-specific calculations
- –Property-engine extensibility is limited for teams needing REFPROP-level switching
- –Automation and API-based integration are not the primary workflow surface
- –Some advanced modeling controls require manual, stepwise scenario setup
- –Bulk processing throughput for large scenario libraries can be slow
HVAC design engineers
Iterate mixed-air and coil paths
Faster design convergence
Energy modeling engineers
Generate consistent psychrometric state outputs
Lower calculation drift
Show 2 more scenarios
Commissioning support teams
Check dehumidification performance assumptions
Clearer discrepancy diagnosis
Teams compare measured inlet states to modeled dew point and humidity ratio targets.
Process HVAC engineers
Model conditioning sequences for product areas
Better process stability
Engineers test scenario changes across cooling and dehumidification steps with controlled inputs.
Best for: Fits when HVAC teams need worksheet-driven psychrometric process comparisons with repeatable exports.
EES
SMBEngineering equation solver with built-in thermophysical functions that include humid-air and psychrometric calculations.
EES equation-solving lets psychrometric state points and performance metrics come from the same user-defined model.
EES by fchartsoftware.com is a desktop psychrometric and thermodynamics solver built around equation-based modeling for HVAC and process calculations. It generates psychrometric charting workflows from scripted relationships, then lets engineers reuse those same equations for state-point solves and performance checks.
EES also supports automation via programmatic calculation blocks that can batch through cooling and dehumidification conditions. Compared with chart-first tools, EES centers on constraint solving and repeatable calculations that can be embedded into larger thermodynamic models.
- +Equation-first modeling supports repeatable psychrometric state solves
- +Batch runs for cooling load profiles across multiple operating points
- +Tight coupling between solver variables and plotted psychrometric outputs
- +Extensibility via user-defined functions and equation blocks
- –Charting workflows depend on building the governing equations correctly
- –Limited built-in UI for air handling unit simulation compared with dedicated tools
- –Less convenient than chart-first products for interactive manual chart work
- –Integration with external psychrometric databases needs add-on effort
HVAC engineers
Solve mixing heating cooling paths
Repeatable air-state calculations
Building-services analysts
Iterate dehumidification conditions quickly
Batch design iterations
Show 2 more scenarios
Validation engineers
Compare predictions against test data
Identified prediction gaps
Run model outputs at rating conditions and document differences from measurements.
Heat exchanger designers
Rate duty and effectiveness across cases
Repeatable sizing results
Implement custom exchanger correlations and compute duty, temperatures, and pressure-drop trends.
Best for: Fits when engineers need equation-based psychrometric calculations and batchable conditioning process path checks.
Carrier HAP
enterpriseHourly Analysis Program with built-in psychrometric charting and system design features.
System-level HVAC simulation ties psychrometric moisture and heat changes to coil and terminal equipment settings.
Carrier HAP calculates moisture and heat properties for air streams and then applies those properties to equipment models like coils and mixing nodes. It can represent mixed air state inputs, then follow a conditioning process path through components while tracking temperature, humidity ratio, and enthalpy changes. It also uses detailed climate inputs to run time-based simulations across occupied and unoccupied conditions.
- +Component-based coil and air handling modeling keeps psychrometric states consistent
- +Time-series simulation links mixed-air conditions to scheduled operating strategies
- +Moisture and enthalpy tracking supports dehumidification-oriented design decisions
- +Project workflow supports exporting documentation for HVAC analysis coordination
- –Psychrometric property behavior is less extensible than code-driven tools
- –Advanced configuration takes longer when modeling complex zoning and controls
HVAC design engineers
AHU cooling and dehumidification sizing
More consistent coil selection
Energy modelers
Zone humidity impact on loads
Improved load balance
Show 1 more scenario
Commissioning teams
Sequence-based psychrometric verification
Faster discrepancies triage
Compare simulated conditioning paths against expected operating behavior for airflow and moisture control.
Best for: Fits when HVAC teams need equipment-linked psychrometrics in repeatable system simulations.
Elite Software Psychrometric+
vertical specialistPsychrometric analysis module within the Elite Software HVAC design suite.
Multi-stage conditioning workflow with process-path overlay across multiple air states in one run.
Psychrometric+ fits teams that move from measured inlet conditions to a conditioning process path like mixing, cooling, humidification, and heating, then need consistent results across many design points. It supports selecting and applying property assumptions for air-state calculations and rendering results on psychrometric charts for engineering review. The workflow also supports scenario iteration, so engineers can compare multiple operating cases with less manual re-entry than single-state calculators.
- +Repeatable conditioning-process path overlays for design scenarios
- +Consistent thermodynamic property handling for state-to-state comparisons
- +Chart outputs support engineering review and explanation of conditions
- +Scenario iteration reduces re-entry across cooling and dehumidification cases
- –Advanced multi-stage setups require careful input mapping
- –Automation and API surface are limited compared with engineering suites
- –Workflow depth may exceed needs for single-state, ad hoc checks
HVAC design engineers
Model mixed air and coil processes
Faster design iteration
Facilities energy modelers
Generate state points for load profiles
More consistent inputs
Show 1 more scenario
Industrial HVAC engineers
Check dehumidification targets
Clear comfort and process impact
Compare humidity ratio and enthalpy changes along cooling and dehumidification paths.
Best for: Fits when HVAC and process engineers need repeatable psychrometric process scenarios.
Engineering ToolBox Psychrometrics
vertical specialistOnline psychrometric calculators and reference charts for moist-air properties and HVAC calculations.
Altitude-adjusted psychrometrics using barometric pressure correction for consistent property outputs across site conditions.
Engineering ToolBox Psychrometrics provides desktop psychrometric calculations for HVAC and process air using a thermodynamic property database and downloadable reference tables. It supports state-point inputs for dry-bulb temperature, humidity ratio, dew point, and enthalpy, then generates common chart coordinates and conditioning-process path values.
- +Thermodynamic property tables support repeatable handoff across HVAC calculations
- +Altitude-adjusted psychrometrics handling reduces site pressure correction errors
- +Consistent state-point inputs for dew point and enthalpy outputs
- +Straightforward chart coordinate style outputs for quick verification
- –Limited evidence of automation features for batch psychrometric process overlays
- –No documented API or integration surface for modeling workflows
- –Thin support for equipment-level simulations beyond basic psychrometric state calculations
- –Workflow stays mostly manual rather than configuration-driven
HVAC technicians
Derive dew point and enthalpy
Quick property lookups
Design engineers
Compute conditioning path values
Consistent path calculations
Show 2 more scenarios
Site engineering teams
Correct properties for altitude
Comparable site-ready outputs
Apply barometric-pressure correction to align psychrometric values with local conditions.
Energy analysts
Validate air property assumptions
Reduced modeling drift
Check enthalpy and humidity ratio outputs against reference tables for analysis inputs.
Best for: Fits when HVAC and process engineers need reliable psychrometric state calculations and quick chart-coordinate checks without integration work.
EngCoolProp
API-firstEngCoolProp exposes humid air and thermodynamic property calculations through Python tools built on CoolProp.
CoolProp integration for psychrometric state derivations, enabling consistent property calculations across scripted scenarios.
EngCoolProp performs psychrometric property calculations by wiring the CoolProp thermodynamic property engine into a psychrometric workflow. It supports generating state points from inputs like dry-bulb and humidity-related variables and uses those properties to derive quantities used for HVAC and process design.
- +CoolProp-backed thermodynamic properties improve consistency across property calls
- +Python-style scripting supports batch psychrometric calculations without manual charting
- +Derived state quantities like enthalpy and humidity ratio are computed from inputs
- +Supports SI and IP unit switching patterns for mixed engineering workflows
- –Chart-style psychrometric process overlays require additional plotting work
- –Coil and AHU simulation workflows are not provided as an end-to-end model
- –Workflow setup depends on having the right inputs and unit handling discipline
- –Export to BIM formats like IFC is not part of the core feature set
Python automation engineers
Batch evaluate conditioning scenarios
Automated scenario runs
HVAC design teams
Compute humidity ratio and enthalpy states
Repeatable design states
Show 2 more scenarios
Process engineers
Convert results into practical design parameters
Usable design metrics
Translate psychrometric states into enthalpy and humidity-ratio-based parameters for equipment sizing.
Research analysts
Generate state points from DB inputs
Reproducible state-point sets
Compute properties from dry-bulb and humidity-related variables to support repeatable studies.
Best for: Fits when engineers need repeatable psychrometric state calculations driven by a thermodynamic property engine.
ASHRAE Psychrometric Chart App
vertical specialistOfficial ASHRAE software for plotting and calculating moist air properties on psychrometric charts.
Altitude-adjusted psychrometrics within an ASHRAE-style chart workflow for consistent field-to-design comparisons.
ASHRAE Psychrometric Chart App provides an ASHRAE-style psychrometric charting workflow for HVAC and process engineers who need fast property reads and state-point checks. It supports interactive psychrometric process path plotting with key properties shown for selected states, including dry-bulb temperature, humidity ratio, dew point, and enthalpy.
- +Quick state-point readouts with HVAC-relevant properties on the chart
- +Interactive process path overlay for stepwise conditioning trajectories
- +Altitude-adjusted chart basis for site-specific psychrometrics
- +Works as a web-first chart calculator without desktop installation overhead
- –Limited workflow depth for coil models and bypass factor calculations
- –No documented automation hooks for batch runs across many conditions
- –Chart-centric outputs make IFC and BIM interoperability unavailable
- –Thermodynamic property coverage is constrained versus REFPROP-grade engines
HVAC engineers
Check state points on ASHRAE chart
Faster engineering review
Building simulation teams
Validate conceptual conditioning paths
Fewer review-cycle revisions
Show 2 more scenarios
Commissioning engineers
Verify measured conditions with chart reads
Better condition verification
Use chart-based state checks to compare measured points to expected psychrometric properties.
Design teams
Run altitude-adjusted property checks
Site-aligned results
Apply altitude-adjusted psychrometrics so chart reads match the installation site.
Best for: Fits when engineers need interactive psychrometric state checks and path overlays during design reviews.
Simscape Moist Air
enterprisePhysical modeling components for moist air systems that support psychrometric behavior in simulation workflows.
Moist-air property logic is integrated into Simscape component simulations, so conditioning processes propagate state through the model.
Simscape Moist Air focuses on psychrometric state calculations embedded inside MATLAB and Simulink physical modeling workflows. It is distinct for coupling moist-air thermodynamic properties with component-level simulation so air states propagate through models.
- +Thermo properties flow into time-domain Simulink models without manual spreadsheet steps
- +Consistent state definitions across components reduce mismatched psychrometric inputs
- +Works inside the Simscape modeling stack for coil, mixing, and control loop studies
- +Supports psychrometric property evaluation driven by model signals
- –Requires MATLAB and Simscape familiarity to build and validate repeatable workflows
- –Chart-centric interaction is weaker than dedicated psychrometric calculator tools
- –Limited standalone API surface compared with tools built for external automation
- –Model setup and state consistency can take iteration for stable results
Control engineers
Propagate moist-air states through models
Coherent system behavior
HVAC modeling teams
Simulate conditioning process path behavior
Repeatable process simulations
Show 2 more scenarios
Thermal system designers
Evaluate property impacts on enthalpy
More consistent energy accounting
Compute humid-air properties with consistent temperature and pressure handling inside physical workflows.
System integrators
Integrate moist-air properties into air-handling simulation
Less property mismatch
Use moist-air components so air states feed component models with aligned property evaluations.
Best for: Fits when teams need psychrometric states as part of Simscape or Simulink air system simulation.
CoolProp Humid Air Tools
API-firstCoolProp provides open-source humid air property functions used for psychrometric calculations across multiple languages.
Tight coupling to CoolProp property models for humid-air and water vapor state solving.
CoolProp Humid Air Tools is a psychrometric calculator built around the CoolProp thermodynamic property database and state solving for humid air and water vapor. It supports psychrometric charting workflows and thermodynamic property queries like enthalpy and humidity ratio, with outputs tied to consistent property models.
- +Property-engine calculations stay consistent across humid-air state queries
- +Flexible inputs support altitude and barometric pressure adjustments
- +Works well for batch evaluation of psychrometric points
- +Entalpy and humidity ratio outputs are grounded in a single property backend
- –Chart styling and diagram layout automation is limited versus full CAD workflows
- –Automation surface is more calculation-focused than HVAC modeling workflow-focused
HVAC performance analysts
Query enthalpy and humidity ratio
Consistent thermodynamic inputs
Design engineers
Compute psychrometric states for conditioning
Repeatable state solutions
Show 2 more scenarios
Testing engineers
Check results against psychrometric conventions
More reliable comparisons
Validate computed conditions using chart-tied psychrometric workflows and property-model outputs.
Modeling teams
Use property-engine outputs in tools
Fewer manual lookup steps
Apply property-engine queries for repeatable calculations rather than GUI-only chart manipulation.
Best for: Fits when engineering groups need repeatable humid-air property calculations within psychrometric workflows.
Conclusion
After evaluating 10 psychrometric software, Carmel Software Psychrometric stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Psychrometric Software
This buyer's guide covers psychrometric software used for HVAC and process engineering workflows across charting, state-point solving, and conditioning-path overlays, including Carrier HAP, Elite Software Psychrometric+, and Hands Down Software. The list also includes EngCoolProp, CoolProp Humid Air Tools, Simscape Moist Air, EES, Engineering ToolBox Psychrometrics, and the ASHRAE Psychrometric Chart App.
Carrier HAP ranks highest for system-level HVAC simulation that ties moisture and heat changes to coil and terminal equipment settings, and it links time-series mixed-air conditions to scheduled operating strategies. Elite Software Psychrometric+ supports multi-stage conditioning workflow with process-path overlay across multiple air states in one run, while Hands Down Software focuses on worksheet session reuse to keep input assumptions consistent across design iterations.
Psychrometric Software for HVAC and process engineers: state solving and conditioning-path workflows
Psychrometric software calculates humid-air thermodynamic state points like enthalpy and humidity ratio, then plots or overlays conditioning paths on psychrometric chart workflows. Many tools support barometric pressure correction and altitude-adjusted psychrometrics to keep outputs consistent across site pressure differences. Carrier HAP goes beyond plotting by running component-linked HVAC simulations that propagate moisture and heat changes through coil and air handling equipment settings.
Other entries emphasize different execution models, like Elite Software Psychrometric+ which targets repeatable multi-stage conditioning scenarios with process-path overlays across multiple air states in one run. EngCoolProp targets scripted psychrometric state derivations via CoolProp-backed property calculations, which supports batch calculations without manual charting work. Hands Down Software prioritizes worksheet-driven scenario iteration so repeated conditioning-path comparisons stay consistent across review cycles.
What to evaluate in Psychrometric Software for HVAC and process work
Psychrometric software becomes useful when the state-point workflow stays consistent from property calculation to conditioning-path overlay. The practical requirement is traceable state propagation, not just a readable chart image.
HVAC and process teams also need repeatable scenarios across operating points. That repeatability depends on the automation surface, batch handling, and the way the tool keeps thermodynamic assumptions aligned between steps.
Component-linked HVAC simulation versus chart-only plotting
Carrier HAP links moisture and heat changes to coil and air handling equipment settings so conditioning paths follow component logic. ASHRAE Psychrometric Chart App focuses on interactive chart workflow with overlays, with limited depth for coil models and bypass-factor style calculations.
Conditioning-path overlay execution model for multi-stage scenarios
Elite Software Psychrometric+ runs a multi-stage conditioning workflow with process-path overlay across multiple air states in one run. Carmel Software Psychrometric ties conditioning process path overlays to manually defined state points to speed what-if reasoning, but without the same repeatable multi-stage execution structure.
Worksheet session reuse for design iteration and review cycles
Hands Down Software uses worksheet session reuse to keep multi-scenario assumptions consistent across conditioning-path iterations. Carrier HAP emphasizes time-series system simulation tied to scheduled strategies, so worksheet reuse is not the primary workflow surface.
Thermodynamic property engine integration and scripting for repeatable calculations
EngCoolProp centers CoolProp-backed thermodynamic properties and supports Python-style scripting for batch psychrometric state derivations. CoolProp Humid Air Tools stays tightly coupled to CoolProp property models for humid-air state solving, with less workflow focus on chart-style process overlay automation.
Automation and API surface for batch runs and integration
Carrier HAP supports engineering-grade automation around component-linked simulation outputs, which reduces manual re-entry across many operating conditions. Elite Software Psychrometric+ has limited automation and API surface compared with engineering suites, which can constrain enterprise integration.
Deployment alignment for model-centric environments
Simscape Moist Air places moist-air property logic inside Simscape component simulations so conditioning processes propagate state through time-domain models. EES keeps psychrometric computation equation-first so state points and performance metrics come from the same user-defined model, but charting and UI depth for AHU modeling are secondary.
How to choose Psychrometric Software based on workflow shape
Start from the workflow owner that will repeatedly run scenarios. Tools built around system simulation and component-linked logic behave differently than tools built around worksheet iteration or equation scripting.
Then map the tool output to the handoff format the project already uses. HVAC modeling teams care about how the tool propagates moisture and heat through equipment logic, while process teams care about batch state derivations and scriptable property calls.
Pick component-linked psychrometrics when the conditioning path must follow equipment settings
Choose Carrier HAP when conditioning paths need to track moisture and heat changes driven by coil and air handling equipment settings. Choose ASHRAE Psychrometric Chart App when the workflow is primarily interactive state-point checks with process-path overlay during design reviews.
Choose multi-stage run structure when scenarios are inherently sequential
Choose Elite Software Psychrometric+ when each design case is a multi-stage conditioning process and state-to-state comparisons must run inside one execution. Choose Carmel Software Psychrometric when rapid overlays from manually defined state points are the dominant task for what-if analysis.
Choose worksheet reuse when inputs must remain consistent across review iterations
Choose Hands Down Software when repeated conditioning-path comparisons must reuse a worksheet session so input assumptions stay stable across iterations. Choose Engineering ToolBox Psychrometrics when the goal is quick altitude-adjusted psychrometric state calculations and quick chart-coordinate checks without integration work.
Choose a property-engine-first tool when automation is the primary driver
Choose EngCoolProp when batch psychrometric state calculations need CoolProp-backed consistency with scriptable scenarios. Choose CoolProp Humid Air Tools when the team wants tight CoolProp coupling for humid-air and water vapor state solving, with automation focused on calculations rather than HVAC modeling.
Choose the modeling environment that matches existing system simulation stack
Choose Simscape Moist Air when psychrometric states must flow inside Simscape and Simulink component simulations without spreadsheet steps. Choose EES when the project prefers equation-based state solves and batchable cooling load profile checks within one user-defined model.
Who Psychrometric Software buyers should target
HVAC design engineers and process engineers both use psychrometric software for state-point solving and conditioning-path overlay, but they differ in how outputs connect to larger models.
Buyers should also consider whether scenario iteration happens as system simulation runs, worksheet cycles, or scripted batch calculations. That determines whether the evaluation focus should be component logic, overlay execution structure, or property-engine extensibility.
HVAC design teams running repeated air handling unit scenarios with coil and terminal equipment logic
Carrier HAP ties psychrometric moisture and heat changes to coil and air handling equipment settings so the conditioning path remains consistent with system configuration logic.
HVAC and process engineers modeling multi-stage conditioning as a sequence of air states in one run
Elite Software Psychrometric+ supports repeatable conditioning-process path overlays across multiple air states in one execution, which fits sequential scenario engineering.
Process engineers needing scripted, batch psychrometric state derivations driven by a thermodynamic property engine
EngCoolProp uses CoolProp-backed thermodynamic properties and Python-style scripting to produce consistent state derivations across large scenario sets.
Simulation teams working inside Simulink and Simscape component models
Simscape Moist Air integrates moist-air property logic into Simscape so conditioning processes propagate state through time-domain simulations.
Engineering teams that require quick altitude-adjusted psychrometric state calculations during design reviews
Engineering ToolBox Psychrometrics and ASHRAE Psychrometric Chart App both focus on altitude-adjusted psychrometrics with interactive chart-based checks rather than deep equipment simulation.
Common buying and implementation pitfalls in Psychrometric Software
Many teams select a tool based on how good the chart looks, then discover the workflow breaks when the project needs repeatable conditioning logic across many scenarios.
Other buyers underestimate how much effort is required to connect property derivations to equipment modeling or to keep thermodynamic assumptions consistent across multi-stage or batch runs.
Choosing a chart-first tool and then trying to force coil or bypass-factor style calculations into it.
Carrier HAP is designed to propagate moisture and heat changes through coil and terminal equipment settings, while ASHRAE Psychrometric Chart App is built around interactive chart overlays with limited coil-model workflow depth.
Building multi-stage conditioning studies in a tool that requires manual state point re-entry for every stage.
Elite Software Psychrometric+ supports process-path overlay across multiple air states in one run, while Carmel Software Psychrometric accelerates what-if overlays tied to manually defined state points.
Assuming CoolProp-based state solving will automatically produce HVAC conditioning path overlays without extra plotting work.
EngCoolProp improves consistency via CoolProp-backed property calculations, but chart-style process overlays require additional plotting work, unlike component-linked HVAC simulation workflows.
Treating automation and API surface as interchangeable across engineering tools.
Elite Software Psychrometric+ has limited automation and API surface compared with engineering suites, while Carrier HAP is positioned for system-level simulation runs that reduce manual scenario handling.
Selecting a property-engine tool for use inside Simulink and Simscape without a native model integration path.
Simscape Moist Air is built to place moist-air property logic inside Simscape component simulations, while EES and calculator-style tools are equation-first and spreadsheet-or-model-driven rather than component-embedded.
How We Selected and Ranked These Tools
We evaluated Carrier HAP, Elite Software Psychrometric+, and Hands Down Software for conditioning-path workflow fit, then cross-checked alternatives like EngCoolProp and Simscape Moist Air for property-engine and model-integration behavior. Features accounted for 40% of the score, with emphasis on how conditioning paths follow execution structure and how repeatable state propagation is handled across scenarios.
Ease and value each accounted for 30%, with ease reflecting how quickly users can set up multi-point or multi-stage cases without fragile manual input mapping. Carrier HAP separated from the field by tying psychrometric moisture and heat changes to coil and air handling equipment settings and by linking mixed-air time-series conditions to scheduled operating strategies.
Frequently Asked Questions About Psychrometric Software
Which tools handle repeatable psychrometric process overlays across multiple air states in one run?
How does CoolProp-based scripting differ between EngCoolProp and CoolProp Humid Air Tools for batch evaluations?
What breaks when a project needs equipment-linked psychrometrics rather than chart-only state checks?
How do EES and Engineering ToolBox Psychrometrics differ for equation-based modeling and batch solving?
When teams need moist-air thermodynamic properties embedded inside a dynamic simulation, which tool fits?
How do state-point iteration workflows compare between Hands Down Software and Elite Software Psychrometric+?
Which tool targets rapid ASHRAE-style review graphics while still supporting altitude-adjusted psychrometrics?
How does KTH Psychrometrics compare with EES for equation solving and constraint workflows?
What admin or governance controls matter most for integrating psychrometric outputs into engineering workflows?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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