Comparison

HVAC Pipe Sizer vs Conduit HVAC Toolkit

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

Head to head
About

HVAC Pipe Sizer

Calculate gas piping systems for low and high pressure. Input flow, pressure, or diameter to find pipe sizes, velocity, and equivalent lengths. Supports English and metric units, with extensive pipe fitting data.

Highlights
  • Low and high pressure gas pipe sizing
  • Calculate flow, pressure drop, diameter, and velocity
  • Universal app for iPhone and iPad
  • English and metric unit support
  • Built-in pipe fitting equivalent length tables
  • Slider controls for quick adjustments
Features
Read full description

The "HVAC Pipe Sizer - Gas Plus" application allows you to quickly size a simple low (less than or equal to 1.5 psi) and/or high (greater than 1.5 psi) pressure gas piping system by inputting a number of piping and gas properties. This application combines the functionality of our popular "HVAC Pipe Sizer - Gas Low" and "HVAC Pipe Sizer - Gas High" applications. This app is a universal app meaning that it works on both the iPhone and iPad and adjusts its screen size accordingly. For low pressure gas piping, you can specify the total gas flow in ft3/hr (m3/hr) and one of either pressure drop (in. wg or Pa), pipe internal diameter (inches) or gas velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total pipe equivalent length. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter and one of either pressure drop or gas velocity parameters to derive the calculated gas flow and other remaining properties. For high pressure gas piping, you can specify the total gas flow in ft3/hr (m3/hr), the upstream pressure (psig or kPa), and one of either downstream pressure (psig or kPa), pipe internal diameter (inches) or gas velocity (ft/s) parameters. The results include both the exact and nominal pipe diameters and the calculated velocity and total pipe equivalent length. If you are analyzing an existing pipe system, there is an option to input the existing pipe internal diameter, the upstream pressure, and one of either downstream pressure or gas velocity parameters to derive the calculated gas flow and other remaining properties. You can specify additional parameters such as the type of gas, various properties of the gas, 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. This app now includes the HVAC Equipment Locator. Click here for details: http://bit.ly/1yTq539 The "HVAC Pipe Sizer - Gas Plus" application was designed by Carmel Software Corporation, a leader in HVAC design software since 1995. In fact, Autodesk (the makers of AutoCAD) acquired our load calculation software and incorporated it into their leading 3D modeling software called Revit. In addition, we developed a number of customized apps for ASHRAE, DNV GL, and other organizations. We also offer the following additional apps for the iPhone and iPad: 1. HVAC Residential Load Calcs for iPhone and iPad 2. HVAC Quick Load Plus 3. HVAC Quick Load 4. HVAC Toolkit 5. HVAC Pipe Sizer – Gas Low Pressure 6. HVAC Pipe Sizer - Gas High Pressure 7. HVAC Pipe Sizer – Liquid 8. HVAC Pipe Sizer – Steam 9. Steam Tables 10. Psychrometric Plus 11. Psychrometric LT 12. HVAC Pipe Sizer Plus 13. HVAC Pipe Sizer Gas Plus 14. HVAC Toolkit Ultimate 15. HVAC Equipment Locator 16. HVAC ResLoad-J 17. HVAC Psych HD

About

Conduit HVAC Toolkit

This iPad app empowers HVAC contractors to quickly scan homes, generate 3D models, and perform certified load calculations. Visualize installations with augmented reality and create professional reports to build customer trust and close more sales.

Highlights
  • LiDAR-powered home scanning
  • 3D model creation
  • ACCA-certified load calculations
  • Augmented reality equipment visualization
  • Professional report generation
  • Faster sales process
Features
Read full description

Conduit Tech is the LiDAR-powered design and sales platform for HVAC professionals. Our iPad-based solution enables contractors to scan homes, create 3D models, perform ACCA-certified load calculations, and visualize installations, all in under 15 minutes. We help HVAC contractors: • Transform complex load calculations into engaging visual sales tools • Create detailed 2D floor plans and 3D models without manual measurements • Visualize equipment placement using augmented reality • Generate professional reports that build customer trust • Close more deals and increase average ticket sizes Built specifically for residential HVAC contractors looking to stand out during in-home visits, Conduit works for traditional systems and heat pumps, while satisfying rebate and permitting requirements. Join thousands of successful HVAC contractors who are transforming their businesses with Conduit Tech. Scan homes, calculate loads, and close deals faster than ever before. Sign up now and transform your HVAC business!

Screenshots

HVAC Pipe Sizer4 screens

Verdict

The call

The clearest difference is price: Conduit HVAC Toolkit at Free against HVAC Pipe Sizer's $7.99. Conduit HVAC Toolkit also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 10 months). On rating, ads, device support and iOS requirement there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Conduit HVAC Toolkit is free to download; HVAC Pipe Sizer costs $7.99 up front. HVAC Pipe Sizer sells 1 one-off in-app purchase. Conduit HVAC Toolkit asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for HVAC Pipe Sizer against 4.9 for Conduit HVAC Toolkit. That said, the two scores are not equally well evidenced: Conduit HVAC Toolkit has 40 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 80% of HVAC Pipe Sizer's written reviews are positive against 100% of Conduit HVAC Toolkit's.

UpkeepUpdate frequency

HVAC Pipe Sizer ships an update every 10 months, Conduit HVAC Toolkit every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
HVAC Pipe Sizer versus Conduit HVAC Toolkit: the parameters behind the verdict, then further details
ParameterHVAC Pipe SizerConduit HVAC Toolkit
Price$7.99Free — better
Rating5.0 (1 ratings) — better4.9 (40 ratings)
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings140 — better
Update frequencyEvery 10 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad — betteriPad
Requires iOS17.0 — better18.6
Further details — not scored
Size1 MB87 MB
Age rating+44+
DeveloperCarmel Software CorporationConduit Tech

Customer experience

HVAC Pipe Sizer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Conduit HVAC Toolkit

All ratings40 ratings
Positive97.5%
Neutral0.0%
Negative2.5%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

HVAC Pipe Sizer

One-time1
  • HVAC Equipment Locator$9.99
None

Conduit HVAC Toolkit

No in-app purchases

Questions

Is HVAC Pipe Sizer free?
HVAC Pipe Sizer costs $7.99, and also offers in-app purchases.
Is Conduit HVAC Toolkit free?
Conduit HVAC Toolkit is free to download, with no in-app purchases.
Which has better reviews, HVAC Pipe Sizer or Conduit HVAC Toolkit?
HVAC Pipe Sizer is rated higher. HVAC Pipe Sizer averages 5.0 out of 5 from 1 ratings, while Conduit HVAC Toolkit averages 4.9 from 40 ratings.
Do HVAC Pipe Sizer or Conduit HVAC Toolkit have ads?
Neither HVAC Pipe Sizer nor Conduit HVAC Toolkit shows ads.
Which is updated more often, HVAC Pipe Sizer or Conduit HVAC Toolkit?
HVAC Pipe Sizer ships an update every 10 months, and Conduit HVAC Toolkit every 3 weeks. Most recently, HVAC Pipe Sizer was updated on November 1, 2026 and Conduit HVAC Toolkit on November 3, 2026.

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