Comparison

HVAC Load Plus vs Gemaire HVAC Pro+

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

Gemaire HVAC Pro+

This app provides HVAC professionals with essential tools and product information to streamline their work. Access pricing, order status, real-time availability, and technical support. It also includes inventory management, warranty services, and helpful calculators.

Highlights
  • View pricing and order status
  • Real-time product availability
  • Search for HVAC models and parts
  • Verify and submit warranty claims
  • Access spec sheets and diagrams
  • Live technical support chat
  • Inventory replenishment tool
Features
Read full description

Gemaire’s mobile app is your HVAC “Easy Button”. It can make your life easier and save time by providing access to product information useful tools whether you’re on-site, in the drive-thru, or just sitting at home watching TV. Features & Benefits You can: * link to your Gemaire account to view your pricing and order status data, as well as real-time product availability at your preferred branch and other nearby Gemaire branches * easily find Gemaire locations, hours, & phone numbers. Get driving directions through your favorite mapping app * search for HVAC equipment models and view the parts list and superseded parts. Scan QR codes or UPC Bar Codes for faster product lookups * also search by system needs to find AHRI matched systems * verify warranty registrations, get related data, and even submit warranty claims while in the field * view spec sheets, wiring diagrams, installation guides, consumer literature, etc. for Gemaire products * engage with Gemaire technical support through live, priority video, text, or audio chat, with the new Gemaire Wingman service * use GEMstock, our time-saving inventory replenishment tool. GEMstock transforms your phone into your inventory smart hub, whether your stock is on a truck or in a warehouse * receive push notifications of special offers & promotions from Gemaire * access multiple useful calculators, including the PT calculator, Sub-Cool calculator, Superheat calculator, Existing Duct calculator, and New Duct calculator * quickly access the flashlight tool to light up attics, closets and equipment while you work Gemaire’s mission is to deliver the quality HVAC products you need, when you need them, and provide expert technical support. Gemaire is the HVAC professionals’ supplier of choice, and we work hard every day to earn and keep your trust Follow us on Facebook and tell us what you think! https://www.facebook.com/Gemaire

Screenshots

HVAC Load Plus4 screens
Gemaire HVAC Pro+4 screens

Verdict

The call

The clearest difference is price: Gemaire HVAC Pro+ at Free against HVAC Load Plus's $24.99. Gemaire HVAC Pro+ also leads on rating (4.8 vs 2.8) and in-app purchases (none vs 1). HVAC Load Plus's advantage is iOS requirement (13.0 vs 16.0). 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

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

ReceptionRating · Positive reviews · Number of ratings

Gemaire HVAC Pro+ holds the better App Store score, 4.8 against 2.8. That said, the two scores are not equally well evidenced: Gemaire HVAC Pro+ has 824 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 60% of HVAC Load Plus's written reviews are positive against 82% of Gemaire HVAC Pro+'s.

UpkeepUpdate frequency

HVAC Load Plus ships an update every 9 months, Gemaire HVAC Pro+ monthly. Both last shipped on November 1, 2026.

Scorecard8 real differences · 2 level
HVAC Load Plus versus Gemaire HVAC Pro+: the parameters behind the verdict, then further details
ParameterHVAC Load PlusGemaire HVAC Pro+
Price$24.99Free — better
Rating2.8 (5 ratings)4.8 (824 ratings) — better
Positive reviews60.0% of reviews81.8% of reviews — better
Number of ratings5824 — better
Update frequencyEvery 9 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size18 MB166 MB
Age rating+44+
DeveloperCarmel Software CorporationWatsco, Inc.

Customer experience

HVAC Load Plus

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews15 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

Gemaire HVAC Pro+

All ratings823 ratings
Positive93.8%
Neutral3.4%
Negative2.8%
Written reviews22 reviews
Positive81.8%
Neutral4.5%
Negative13.6%

Bugs and requests

HVAC Load Plus

Not enough reviews yet to summarise bugs or requests.

Gemaire HVAC Pro+

Reported bugs

4 issues
  • App crashes on startup
  • Cart item navigation scrolls to bottom of page
  • Login functionality not working
  • App crashes and performance issues in older versions

Requested features

3 requests
  • Restore complete systems option for residential equipment
  • Improve cart item navigation to avoid excessive scrolling
  • Streamline equipment matchup selection process

In-app purchases

1 purchases

HVAC Load Plus

One-time1
  • HVAC Equipment Locator$9.99
None

Gemaire HVAC Pro+

No in-app purchases

Questions

Is HVAC Load Plus free?
HVAC Load Plus costs $24.99, and also offers in-app purchases.
Is Gemaire HVAC Pro+ free?
Gemaire HVAC Pro+ is free to download, with no in-app purchases.
Which has better reviews, HVAC Load Plus or Gemaire HVAC Pro+?
Gemaire HVAC Pro+ is rated higher. HVAC Load Plus averages 2.8 out of 5 from 5 ratings, while Gemaire HVAC Pro+ averages 4.8 from 824 ratings.
Do HVAC Load Plus or Gemaire HVAC Pro+ have ads?
Neither HVAC Load Plus nor Gemaire HVAC Pro+ shows ads.
Which is updated more often, HVAC Load Plus or Gemaire HVAC Pro+?
HVAC Load Plus ships an update every 9 months, and Gemaire HVAC Pro+ monthly. Most recently, HVAC Load Plus was updated on November 1, 2026 and Gemaire HVAC Pro+ on November 1, 2026.

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