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 and load calculation tool in New Zealand — trusted by installers across the country for accurate, standards-compliant results.
★ Now available in PRO & LITE versions
After your first subscription ends, EzeCalc automatically continues in LITE mode — so you always have access to the load calculator at no cost. Advanced features including project saving, ducted system design, floor plan calculator, Comfort Design Certificates, and maintenance management are available when you renew your PRO subscription.
Why EzeCalc?
The complete HVAC calculation and project management platform for New Zealand professionals — in your pocket or on your desktop.
⬆ Version 14 — May 2026 — Latest ReleaseJust Released
💡 What's New in Version 14
Floor Plan Load Calculator PRO • Desktop
Import your floor plan, set the scale, and draw directly around rooms. Loads are calculated automatically from your drawing — no manual entry needed. Multi-floor support, polygon rooms, and a professional print report included.
Comfort Design Certificate PRO
Issue a verified certificate to your customer confirming their system was correctly sized. A unique reference number records the calculation, the system, and your details — protecting you if anything changes later.
CDC Accredited Skills Directory Badge PRO
Active PRO subscribers automatically receive a CDC Accredited badge on their Skillsure Skills Directory listing — visible to homeowners searching for a verified heat pump installer.
Version 14 builds on Version 12 — all V12 features remain fully available. The Floor Plan tool works alongside the standard room-by-room calculator, not as a replacement.
Everything EzeCalc Does
Lightning-Fast Calculations
NZS 4218:2009 room loads in under two minutes. Quick instant calculator for fast estimates, detailed mode for precision. Both LITE and PRO.
Project Management
Save unlimited projects in the cloud, group rooms by project, duplicate similar rooms to save time, and open any saved project instantly. (PRO)
Full Ducted System Selector
Add rooms to ducted projects. Calculate air volumes, duct sizes, and outlet requirements. Automated ductwork layout and static pressure. (PRO)
Service & Maintenance
Log service checks, add photos, and send professional maintenance reports by email directly from site. Automated customer reminders. (PRO)
Equipment Selector
Compare Fujitsu, Daikin, Haier, Gree, Toshiba and MHI models side by side. Print technical data sheets for selected equipment. (PRO)
Cost-to-Run Comparison
Compare heat pumps vs electric, gas, and wood heating. Generate professional customer-ready running cost reports. (PRO)
Plus These Additional Tools
- ✓ NZ G4 Fresh Air & Ventilation Calculator — building code compliant
- ✓ Refrigerant Charge Safety Calculator — AS/NZS occupied/unoccupied zones
- ✓ Heat Pump Fault Code Database — major NZ brands
- ✓ Performance Calculator — verify installed system output
- ✓ Digital Psychrometric Chart
- ✓ Nitrogen Pressure Testing Calculation
- ✓ Flare Nut Torque Settings Reference
- ✓ Metric Conversion Calculator
- ✓ Ducted System Commissioning Tools
- ✓ New Zealand climate zones & NIWA design temperatures built-in
LITE vs PRO — What You Get
Both versions use the same trusted NZS 4218:2009 calculation engine. Upgrade any time to unlock PRO features.
| Feature | LITE | PRO — V14 |
|---|---|---|
| ⬆ New in Version 14 | ||
| 📐 Floor Plan Load Calculator (Desktop) | — | ✓ Draw rooms on your floor plan |
| 🏅 Comfort Design Certificate | — | ✓ Issue & manage certificates |
| 🏭 CDC Accredited Skills Directory Badge | — | ✓ Auto-applied to your listing |
| Core Calculation | ||
| NZS 4218:2009 Room Load Calculator | ✓ | ✓ |
| Quick Instant Calculator | ✓ | ✓ |
| NZ G4 Fresh Air Calculator | ✓ | ✓ |
| Nitrogen Pressure Testing & Flare Torque | ✓ | ✓ |
| Metric Conversion Calculator | ✓ | ✓ |
| PRO Features | ||
| Project Save, Open & Print / Email Reports | — | ✓ Unlimited cloud projects |
| Full Ducted System Selector & Duct Design | — | ✓ Airflow, duct sizing, layout |
| Equipment Selector & Comparison | — | ✓ Major NZ brands |
| Service & Maintenance Management | — | ✓ Email reports from site |
| Cost-to-Run Comparison Reports | — | ✓ Heat pump vs gas/electric/wood |
| Refrigerant Charge Safety Calculator | — | ✓ AS/NZS compliant |
| Fault Code Database | — | ✓ Multi-brand NZ database |
| Performance & Psychrometric Tools | — | ✓ |
| Desktop Members Area & Extended Tools | — | ✓ Full desktop version access |
Two Ways to Access EzeCalc
The same account works for both — use whichever suits your device.
Mobile & Tablet
Optimised for on-site use. Fast load calculations from any internet-connected device. Full NZS 4218 calculator, quick estimate tool, and core reference tools.
Open Mobile VersionDesktop — Full PRO Suite
Includes the V14 Floor Plan Calculator, Comfort Design Certificates, full project management, ducted system design, and all advanced PRO tools. Recommended for office use.
Open Desktop VersionRecent Version History
Version 14.0 — May 2026 Current
Floor Plan Load Calculator (Desktop/PRO), Comfort Design Certificates (PRO), CDC Accredited Skills Directory badge, UI improvements.
Version 12.1 — 2025
Fixed fresh air calculator for ventilation size selection in the tools menu.
Version 12.0 — 2025 Major
Complete interface redesign, project management, ducted system selector, maintenance management, advanced reporting, equipment selector, cost comparison, commissioning tools, and more.
Ready to get started?
No installation needed — runs in your browser. Log in with your Skillsure account or contact us to get access.
Secure login • Cloud-based • New Zealand focused • Updated regularly
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.
