Comparison

HVAC Pipe Sizer vs ASHRAE Psychrometric Chart

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

HVAC Pipe Sizer

Calculate pipe sizes for liquid systems, including hot and chilled water. Input flow rate, head loss, diameter, or velocity to determine other properties. Supports various liquids, pipe materials, and fittings, with English or metric units.

Highlights
  • Liquid pipe sizing
  • Hydronic system calculations
  • Input flow, head loss, diameter, or velocity
  • Calculate fluid flow and head loss
  • Supports various liquids and pipe materials
  • English and metric unit options
  • Email results
Features
Read full description

The "HVAC Pipe Sizer - Liquid" application allows you to quickly size a simple pipe system by inputting a number of piping and liquid properties, including hot and chilled water (hydronic). This app is a universal app that works on both the iPhone and iPad and adjusts its screen size accordingly. This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539 You can specify the total fluid flow in GPM (or L/s) and one of either unit head loss (ft/100ft), pipe internal diameter (inches) or fluid velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total head loss. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter and one of either unit head loss or fluid velocity parameters to derive the calculated fluid flow and other remaining properties. You can specify additional parameters such as the type of liquid, various properties of the liquid, the pipe material type, the total length of pipe, quantities for up to 11 different types of pipe fittings, and much more. You can also choose to display values in either english or metric units. This application includes built-in pipe fitting equivalent length and nominal pipe sizing tables for a wide variety of pipe material types and diameters. This application uses slider controls that allow you to quickly increment or decrement the input values and immediately observe the calculated results. You can also manually input exact values. The app allows you to email inputs and results once you have completed an analysis. We also offer the following additional applications for the iPhone/iPad: 1. HVAC Duct Sizer 2. HVAC Pipe Sizer โ€“ Gas Low Pressure 3. HVAC Pipe Sizer - Gas High Pressure 4. HVAC Pipe Sizer โ€“ Liquid 5. HVAC Pipe Sizer โ€“ Steam 6. Steam Tables 7. Psychrometric Plus 8. Psychrometric LT 9. HVAC Pipe Sizer Plus 10. HVAC Pipe Sizer Gas Plus 11. HVAC Toolkit 12. HVAC Toolkit Ultimate 13. HVAC Residential Load Calcs 14. HVAC Load Plus 15. HVAC Equipment Locator 16. ASHRAE Duct Fitting Database 17. ASHRAE 62.1 Ventilation Load Calcs 18. HVAC Psych HD 19. HVAC ResLoad-J 20. HVAC Residential Load Calcs HD

About

ASHRAE Psychrometric Chart

This interactive tool allows users to plot and customize psychrometric charts on their iPad. Easily create and save HVAC process graphs, update properties dynamically, and share charts and data via email. Supports both IP and SI units.

Highlights
  • Interactive psychrometric chart plotting
  • Customizable chart appearance
  • Dynamic property updates
  • Create and edit points and labels
  • Email charts and data
  • Unlimited projects and templates
  • Zoom and pinch functionality
Features
Read full description

The HVAC Psychrometric Chart app is the first truly interactive graphical psychrometric chart for the iPad, and it includes both IP and SI units. It is now optimized for iOS 16. Using your finger, you can easily plot HVAC and other psychrometric processes on the iPad screen while you are out in the field, save the graphs, and then email the graph and results to yourself or clients. The HVAC Psych Chart app includes the following features and functionality: 1. Displays a fully customizable psychrometric chart in both landscape and portrait modes. 2. Allows you to customize the graph in many different ways including specifying the psychrometric chart line colors, chart background color, hide/display status of chart lines, point colors, process line colors, units of graph values, and the min/max limits of the chart. 3. Using your finger, you can plot as many points as you want on the screen. As you move your finger around the graph, the psychrometric properties at the top of the screen dynamically update . In addition, you can double-tap a point to display the point properties and then edit them. 4. Create psychrometric processes by plotting points then connecting them with process lines. Also, create custom labels anywhere on the chart. 5. After you have completed creating the chart, you can email a list of all the points and their properties along with a PDF of the chart, itself. 6. Create an unlimited number of psychrometric chart projects. Also, you can create templates that you can reuse over and over again. 7. Zoom in or out of the chart by "pinching" the iPad screen so as to view items in more detail. 8. Display sensible heat ratio (SHR) line 9. Display psych process line as curved along 100% RH line.

Screenshots

HVAC Pipe Sizer4 screens

Verdict

The call

The clearest difference is price: HVAC Pipe Sizer at $4.99 against ASHRAE Psychrometric Chart's $19.99. HVAC Pipe Sizer also leads on review sentiment (71% vs 27%). ASHRAE Psychrometric Chart's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 17.0). On update cadence, ads, monetization model and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

HVAC Pipe Sizer costs $4.99 and ASHRAE Psychrometric Chart $19.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase. ASHRAE Psychrometric Chart asks for nothing beyond the download.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 8 months, ASHRAE Psychrometric Chart every 11 months. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.

Scorecard4 real differences ยท 4 level
HVAC Pipe Sizer versus ASHRAE Psychrometric Chart: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerASHRAE Psychrometric Chart
Price$4.99 โ€” better$19.99
Positive reviews71.4% of reviews โ€” better27.3% of reviews
Update frequencyEvery 8 months โ€” betterEvery 11 months
AdsNoNo
In-app purchasesYesNo โ€” better
MonetizationPaidPaid
DevicesiPhone, iPad โ€” betteriPad
Requires iOS17.013.0 โ€” better
Further details โ€” not scored
Size1 MB2 MB
Age rating+44+
DeveloperCarmel Software CorporationASHRAE, Inc.

Customer experience

HVAC Pipe Sizer

Written reviews7 reviews
Positive71.4%
Neutral0.0%
Negative28.6%

ASHRAE Psychrometric Chart

Written reviews11 reviews
Positive27.3%
Neutral27.3%
Negative45.5%

In-app purchases

1 purchases

HVAC Pipe Sizer

One-time1
  • HVAC Equipment Locator$9.99
None

ASHRAE Psychrometric Chart

No in-app purchases

Questions

Is HVAC Pipe Sizer free?
HVAC Pipe Sizer costs $4.99, and also offers in-app purchases.
Is ASHRAE Psychrometric Chart free?
ASHRAE Psychrometric Chart costs $19.99, with no in-app purchases.
Do HVAC Pipe Sizer or ASHRAE Psychrometric Chart have ads?
Neither HVAC Pipe Sizer nor ASHRAE Psychrometric Chart shows ads.
Which is updated more often, HVAC Pipe Sizer or ASHRAE Psychrometric Chart?
HVAC Pipe Sizer ships an update every 8 months, and ASHRAE Psychrometric Chart every 11 months. Most recently, HVAC Pipe Sizer was updated on October 27, 2026 and ASHRAE Psychrometric Chart on October 12, 2026.

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