Software Tools - EzeCalc & Gas Cylinder Mate
Skillsure, a leading provider of quality HVAC training in New Zealand, also develops powerful, web-based tools designed for the HVAC industry.
We prioritize ease of use and accessibility, ensuring our applications can be accessed from any internet-connected device and are continuously improved.
Discover two of our key applications below. For seamless access on any mobile device, simply add these tools to your home screen—a quick and easy process on both Apple and Android platforms.
Before using, please carefully review and agree to our user and license agreements.
EzeCalc – Heat Pump Air Conditioning
With a proven track record since 2008, EzeCalc has been a leading heat pump selection tool in New Zealand
** NOW ** With Pro & Lite Versions. After your first subscription ends the software will change to ‘lite’ mode allowing contnued use of the calculator. Advanced features are available once you renew your subscription.
Why EzeCalc?
The “Swiss Army Knife” of Air-Conditioning Support Tools — in your pocket or on your desktop.
Updated Nov 2025 · Version 10.1 Now Available
Built for New Zealand Professionals
- Truly Mobile: Access from any internet-connected device — optimised for mobile.
- New Zealand Focused: Uses NIWA data and reflects local climate zones and design temperatures.
- Lightning-Fast Calculations: Determine room loads in under two minutes with proven, trusted methods.
- Full Ducted Selection: Add rooms, view total loads & airflows, and size ductwork & outlets accurately.
- Project Management Made Easy: Open, save, and share projects securely online — anytime, anywhere.
- Instant Documentation: Print or email professional reports for clients & records.
- Comprehensive Support Tools: Commissioning, capacity testing, and cost-to-run estimators built-in.
- Fault Code Lookup: Instantly diagnose issues for supported brands with likely causes.
- Service & Maintenance Records: Log service checks and email reports directly from site.
- Building Code Compliance: Integrated G4 Fresh Air calculator ensures NZ building-code compliance.
- Equipment Selection Simplified: Quickly compare Fujitsu, Daikin, Haier, Gree, Toshiba and MHI models.
- Digital Ductulator & Psychrometric Chart: Replace traditional tools with precise digital versions.
Choose Your EzeCalc Experience
| Feature | Lite Version | Pro Version 10.1 |
|---|---|---|
| Room Load Calculator | ✔ | ✔ Inc Project open print & save. Plus email report features |
| Ducted System Selection | — | ✔ Full duct design + airflow calc |
| Project Save / Print / Email & Open | — | ✔ Unlimited cloud-stored projects |
| Fault Code Database | — | ✔ Multi-brand database |
| Cost-to-Run Estimator | — | ✔ Full load profile estimator |
| Service & Maintenance Logs | — | ✔ Email client reports on site |
| NZ G4 Fresh Air Calculator | ✔ | ✔ |
| Digital Psychrometric Chart | — | ✔ |
| Nitrogen Pressure Testing Calculation | ✔ | ✔ |
| Flare Nut Torque Settings | ✔ | ✔ |
| Metric Conversion Calculator | ✔ | ✔ |
| Performance Testing Tools | — | ✔ Temperature / Airflow |
| Membership Website | — | ✔ Extended website only support tools & features |
Both versions share the same trusted calculation engine — upgrade any time to unlock Pro features.
No installation needed · Runs in your browser · Secure login from any device
Get EzeCalc FREE for 12 Months!
Enroll on the Skillsure Heat Pump Course or our new On-Line Ducted Installers Course and receive a full 12-month subscription to EzeCalc absolutely FREE! After your complimentary year, continue accessing EzeCalc pro features for only $75 + GST annually.
Or purchase EzeCalc outright for $245 + GST, then just the $75 + GST yearly subscription.
(All prices are NZD)
Contact us for a free trial using the contact us option:
Press the box image below to be transferred to the application.
Gas Cylinder Mate – Calculate the correct fill weight of a recovery cylinder.
Designed for New Zealand Refrigeration / Air Conditioning / Heat Pump Installers.
Introducing Gas Cylinder Mate, the comprehensive mobile application designed to support your fillers license training and ensure safe refrigerant recovery throughout New Zealand. Whether you’re a seasoned technician or just starting your training, Gas Cylinder Mate provides the tools and information you need at your fingertips.
Key Features:
- Accurate Fill Calculations: Calculate safe fill amounts using both Fill Ratio and Specific Gravity methods.
- Extensive Refrigerant Database: Access safety data sheets for all common refrigerants.
- Approved Cylinder Lookup: Instantly search a WorkSafe database for approved cylinders by LAB number.
- Safety Check Guidance: Step-by-step instructions for pre- and post-fill safety checks.
- Recovery Diagram Reference: Visual guides for Vapor, Liquid, and Push-Pull recovery methods.
- NZ Gas Supplier Directory: Find gas suppliers conveniently located across New Zealand.
- Recovery Cylinder Emptying. Information and link to Cool-Safe free collection and delivery service for recovered refrigerant (includes a bounty buy back fee!)
- Cylinder Testing Resources: Quick access to WorkSafe’s list of approved cylinder test centers.
- Safe Charge Calculator calculate the safe charge amount for systems charged with either R32 or R290 in a residential setting. This is a new beta test feature and we are seeking feedback on its use.
- Essential Calculation Tools: Includes a Nitrogen Pressure Test calculator to determine potential pressure loss.
- Informative FAQ: Answers common questions about safe cylinder filling practices. Plus information on international agreements on refrigerants.
- Cylinder Tracking: Track cylinder purchases. Gas use and disposal of gas after safe recovery. Includes QR Printing and scanning for cylinder retrieval and updates of usage.
- Risk Assessment Records Easily record / Log and manage risk assessments for all work associated with filling cylinders.
- Free for Trainees: Gas Cylinder Mate is provided free of charge to all fillers license training course attendees in New Zealand, regardless of the training provider.
- Regular Updates: The app is consistently updated with the latest information and resources.
Gas Cylinder Mate empowers you to perform safe and accurate refrigerant recovery, ensuring compliance and best practices.
Press the box image below to be transferred to the application.
Gas cylinder mate is provided free. Registration as a user is required to gain access from within the app.
