HVAC Pipe Sizer - Gas Low

HVAC Pipe Sizer - Gas Low

Low pressure gas pipe calcs

2 ratings
2 reviews
#186 in paid Productivity
🔧 Utilities
📊 Productivity
$4.99

Details

  • Released
  • Updated
  • December 3, 2009
  • December 5, 2025

Features

HVAC Pipe Sizer - Gas Low screenshot #1 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #2 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #3 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #4 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #5 for iPhone
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HVAC Pipe Sizer - Gas Low screenshot #7 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #8 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #9 for iPhone
HVAC Pipe Sizer - Gas Low screenshot #10 for iPhone
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About

Quickly size low-pressure gas piping systems by inputting flow, pressure drop, diameter, or velocity. Includes detailed gas and pipe properties, fitting data, and unit conversion.

Low pressure gas pipe sizing
Input flow, pressure drop, diameter, or velocity
Calculate exact and nominal pipe diameters
Specify gas and pipe properties
Includes pipe fitting equivalent lengths
English and metric unit display
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What's New in HVAC Pipe Sizer

4.76

December 5, 2025

1. Added a Share button to the iPhone and iPad versions of the app, so you can now text, email, and download reports. 2. Updated help. 3. Optimized for iOS 26.

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Charts

Top Paid

📉 186-25

Productivity

This app dropped -25 positions in Productivity chart.

Last updated on July 18, 2026.

User reviews

Lots of functionality

This app has lots of great functionality. Allows me to input gas flow then either input pressure drop, diameter, or velocity. Also, allows me to size according to diameter and pressure drop to see what the expected flow rate is.

I also like how it stores all my results, so when I close it and come back to it later on, the same values are there.

Very useful.
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Useful for field work

Great little app for approximating low pressure gas pipe sizes out in the field. I often go to homes to diagnose heating issues and want to make sure the gas pipes are the correct size (you won't believe how many are over or under sized). Anyway, this app helps me diagnose those issues. I highly recommend it.
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Developer apps

FAQ

What is HVAC Pipe Sizer - Gas Low used for?

HVAC Pipe Sizer - Gas Low is used to quickly size simple low-pressure (under 1.5psi) gas piping systems. It calculates pipe diameters, velocity, and equivalent length based on various input parameters.

What types of inputs can I provide for HVAC Pipe Sizer - Gas Low?

You can input total gas flow, pressure drop, pipe internal diameter, or gas velocity. The app then calculates the remaining parameters.

Does HVAC Pipe Sizer - Gas Low support different units?

Yes, all values can be displayed in either English (IP) or Metric (SI) units, allowing for flexible use in different regions and standards.

What information does HVAC Pipe Sizer - Gas Low include about pipe fittings?

The application includes built-in tables for pipe fitting equivalent lengths for a wide variety of pipe material types and diameters, aiding in accurate calculations.

How does HVAC Pipe Sizer - Gas Low handle user input?

It features slider controls for quick adjustments of input values and immediate observation of results, alongside the ability to manually input exact values.

Is HVAC Pipe Sizer - Gas Low suitable for analyzing existing pipe systems?

Yes, there is an option to input existing pipe internal diameter and either pressure drop or gas velocity to derive the calculated gas flow and other properties of an existing system.

What is the price of HVAC Pipe Sizer - Gas Low?

HVAC Pipe Sizer - Gas Low is a paid application priced at $4.99.

How often is HVAC Pipe Sizer - Gas Low updated?

The latest version, 4.76, was last updated on December 5, 2025, indicating active development and maintenance by the developer.