AirMaxx Lite vs IHWAP Diagnostics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AirMaxx Lite
Quickly calculate HVAC system fan and static pressure performance. Input basic system information and two static pressure measurements to receive clear visual representations of system status. Includes tutorials and articles for guidance.
- Fan airflow performance calculation
- Static pressure performance calculation
- Visual system status representation
- Input nameplate information
- Two static pressure measurements
- Includes tutorials and articles
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The easiest way to quickly calculate Fan Airflow Performance and Static Pressure Performance for HVAC Systems installed in a home or commercial building. Here's how it works: 1 - Collect simple nameplate information from the customers HVAC system 2 - Take two static pressure measurements 3 - The app does the rest! You'll get clean, easy-to-understand visual representations of the status of their system (see screenshots for samples) Included in the app is some helpful tutorials and articles that will help you get started in understanding how to take proper total external static pressure measurements to calculate airflows. Some additional benefits: - Requires no data plan - Simple & clean interface - Test results are displayed visually for easy understanding - Measurement inputs & calculations displayed for verification AirMaxx Lite is a great tool to help you explain the benefits of good airflow to your customers. To learn more about ComfortMaxx, NCI's advanced HVAC performance testing cloud application visit NCLink.com/CMaxx.
IHWAP Diagnostics
This application assists with home weatherization by quantifying air leakage, calculating ventilation needs, and assessing duct system pressure against program standards. It helps prioritize air sealing and ensures compliance with energy efficiency guidelines.
- Zone Pressure Diagnostics (ZPD)
- Total External Static Pressure (TESP) calculation
- ASHRAE ventilation requirements
- Leakage reduction potential estimation
- ENERGY STAR compliance checks
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Illinois Home Weatherization Assistance Program (IHWAP) Diagnostics application for the University of Illinois. This app is the product of a collaboration between the Indoor Climate Research & Training Center’s Senior Weatherization Trainer, Nate Price, and me. The Zone Pressure Diagnostics (ZPD) function will quantify the connection between the house and a zone and between that zone and the outdoors. It will also estimate the total leakage reduction potential in the zone, which should assist with prioritizing air sealing measures. The Total External Static Pressure (TESP) function will calculate total pressure and the pressure caused by the various components of a duct system and compare them to Illinois Home Weatherization Assistance Program (IHWAP) standards for recommended replacement options. The American Society of Heating and Air-Conditioning Engineers (ASHRAE) function will calculate home ventilation requirements ensuring proper pollutant control and ENERGY STAR compliance.
Screenshots
Verdict
The clearest difference is rating: IHWAP Diagnostics at 5.0 against AirMaxx Lite's 4.4. AirMaxx Lite's advantage is update cadence (every 2 months vs every 5 months) and iOS requirement (9.3 vs 16.0). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
IHWAP Diagnostics holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 5 respectively.
AirMaxx Lite ships an update every 2 months, IHWAP Diagnostics every 5 months. The most recent releases landed on October 9, 2026 and September 26, 2026 respectively.
| Parameter | AirMaxx Lite | IHWAP Diagnostics |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 7 — better | 5 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.3 — better | 16.0 |
| Further details — not scored | ||
| Size | 23 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | National Comfort Institute, Inc. | Travis Jenkins |
Customer experience
AirMaxx Lite
IHWAP Diagnostics
In-app purchases
AirMaxx Lite
No in-app purchases
IHWAP Diagnostics
No in-app purchases
Questions
Is AirMaxx Lite free?
Is IHWAP Diagnostics free?
Which has better reviews, AirMaxx Lite or IHWAP Diagnostics?
Do AirMaxx Lite or IHWAP Diagnostics have ads?
Which is updated more often, AirMaxx Lite or IHWAP Diagnostics?
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