Comparison

HVAC Load Plus vs ERPNext Workflow

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

Head to head
About

HVAC Load Plus

Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.

Highlights
  • Detailed heating and cooling load calculations
  • 1000+ city weather database
  • Extensive construction type data
  • Unlimited project creation and storage
  • Comprehensive load breakdown reports
  • Emailable HTML reports with spreadsheet attachments
  • Company information display on reports
Features
Read full description

The HVAC Load+ iPhone app allows you to perform detailed heating and cooling block loads for small commercial and residential buildings out in the field by taking advantage of the simplicity and power of the iPhone. It performs heating and cooling block load calculations based upon industry standard calculation methods. The following is just a small sample of the features included in this app: 1. Includes a 1000+ world-wide city weather database 2. Includes data for 100s of construction types for walls, roofs, floors, doors, windows, skylights, ceilings, and more 3. Allows you to create and store an unlimited number of projects. You can also copy existing projects to new projects for easy reuse of data 4. Allows you to specify an unlimited # of opaque types (ie – doors, walls, roofs, floors, ceilings), window types, and skylight types for each building 5. Allows you to view comprehensive cooling and heating load breakdown reports including breakdown by opaque load, window load, skylight load, infiltration load, ventilation load and internal load contributions 6. Opaque inputs include opaque type, opaque construction number, dimensions, and opening areas 7. Window inputs include window type, internal and external shading type, overhang dimensions, window area, and more.. 8. Skylight inputs include skylight type, dimensions, orientation, and more.. 9. Additional input types include # of people, # of bedrooms, ventilation airflow, and more.. 10. Includes the ability to display a comprehensive HTML report that you can email to yourself or others, and it also includes a spreadsheet attachment that you can open in Excel to further massage data on your desktop 11. Includes ability to input your company information to display on the emailed report 12. Includes ability to display units in either English (IP) or Metric (SI). 13. Equipment location services It also includes 2 bonus modules: 1. The "HVAC Equipment Locator" has the same functionality as our stand-alone Locator app. It allows you to input information about all of your HVAC equipment, upload it to a remote web server (at www.carmelsoft.com/EL), and SAFELY share information about it with other technicians within your company. The equipment's GPS coordinates become its globally unique identifier, allowing you to input and retrieve information about it just by standing next to it. 2. The “HVAC Quick Load” module allows you to quickly perform rule-of-thumb heating and cooling load calcs based upon just inputting the building type, square area, and # of people. Please see the description located under the stand-alone "HVAC Quick Load" app for more details about it. The benefits of using this app are: 1. Great for use out in the field. Quickly size heating and cooling equipment, show the client, then email the results back to your office for further analysis. 2. Show off your advanced on-screen reports to clients convincing them you are using cutting-edge technology 3. Save time by inputting information in the field and then returning to your office to perform more in-depth analysis This app was designed by Carmel Software Corporation, a 20-year old software design firm specializing in engineering analysis software applications geared toward engineers, architects, technicians, and home owners. In fact, our software powers the analysis capabilities of major Autodesk software tools such as Revit (The makers of AutoCAD). We will continue to update this app based upon user feedback. Please email us at info@carmelsoft.com for any comments. We also offer training and tutorial videos at: www.carmelsoft.com/HVACLoadPlus.

About

ERPNext Workflow

Features
Read full description

To ensure users continue to use our Workflow Application for ERPNext, we have designed the system to be simple, intuitive, and efficient. The application provides a clear and guided approval process, reducing confusion and manual follow-ups. Real-time notifications, dashboards, and status visibility. Each action is just one or two clicks, making the workflow faster than email or manual paperwork. Additionally, role-based access ensures that users only see what is relevant to them, improving focus and productivity. By delivering a smooth experience, reducing approval delays, and maintaining transparency, the application becomes a daily-use tool that users naturally prefer and rely on.

Screenshots

HVAC Load Plus4 screens
ERPNext Workflow4 screens

Verdict

The call

The clearest difference is price: ERPNext Workflow at Free against HVAC Load Plus's $24.99. ERPNext Workflow also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 9 months). HVAC Load Plus's advantage is iOS requirement (13.0 vs 15.0). On ads and device support 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

ERPNext Workflow is free to download; HVAC Load Plus costs $24.99 up front. HVAC Load Plus sells 1 one-off in-app purchase. ERPNext Workflow asks for nothing beyond the download.

UpkeepUpdate frequency

HVAC Load Plus ships an update every 9 months, ERPNext Workflow every 2 months. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
HVAC Load Plus versus ERPNext Workflow: the parameters behind the verdict, then further details
ParameterHVAC Load PlusERPNext Workflow
Price$24.99Free — better
Rating2.8 (5 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 9 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size18 MB28 MB
Age rating4+4+
DeveloperCarmel Software CorporationMidocean Technologies Private Limited

In-app purchases

1 purchases

HVAC Load Plus

One-time1
  • HVAC Equipment Locator$9.99
None

ERPNext Workflow

No in-app purchases

Questions

Is HVAC Load Plus free?
HVAC Load Plus costs $24.99, and also offers in-app purchases.
Is ERPNext Workflow free?
ERPNext Workflow is free to download, with no in-app purchases.
Do HVAC Load Plus or ERPNext Workflow have ads?
Neither HVAC Load Plus nor ERPNext Workflow shows ads.
Which is updated more often, HVAC Load Plus or ERPNext Workflow?
HVAC Load Plus ships an update every 9 months, and ERPNext Workflow every 2 months. Most recently, HVAC Load Plus was updated on October 15, 2026 and ERPNext Workflow on October 1, 2026.

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