Free Apps for NZ Professionals
The Tools NZ HVAC & Refrigeration Professionals Use Every Day
Two purpose-built mobile apps — one for HVAC design and engineering calculations, one for refrigerant technicians in the field. Both free to join. Both built for New Zealand.
📷 Mobile-first PWA
🏴 Built for NZ
👤 1,100+ users
📱 Add to home screen
1,100+
Registered users across both apps
2
Purpose-built apps for the trade
NZ
Standards & data — NZS, AS/NZS
Free
No cost to register and get started
EzeCalc
The mobile HVAC engineering toolkit for designers, contractors, and technicians. Calculations, product selection, and compliance tools — all in one place.
HVAC Design
Refrigerant Tools
Product Selection
What EzeCalc Does
Heat Load Calculator
NZS 4218 compliant heating & cooling loads across multiple rooms
Heat Pump Selection
Find the right unit by capacity and manufacturer from NZ product data
Hot Water Heat Pump
Select HWHP systems with full performance data
Energy Calculator
Compare running costs — heat pump vs gas vs electric vs wood
Pressure Testing
N₂ hold time calculator with printable compliance certificate
Gas Safety Calculator
Maximum safe refrigerant charge per AS/NZS 5149
Performance Check
COP diagnostics & P-h cycle analysis for R410A, R32, R290, R454B
Fault Code Lookup
Search heat pump fault codes by manufacturer, code, or symptom
Maintenance Schedule
Log service intervals, jobs, and run a full service checklist
Fresh Air & More
Fresh air calc, unit converter, flare nut torque, N₂ P/T correction
PRO
A free account gives you access to core tools. Upgrade to EzeCalc PRO to unlock the full toolkit — performance diagnostics, energy calculator, gas safety, fault codes, saved projects, and more. From $10/month.
Gas Cylinder Mate
The free field companion for NZ refrigerant technicians. Cylinder fill calculations, LAB lookups, and compliance references — exactly where you need them.
Refrigerant Tech
Field Use
Compliance
What Gas Cylinder Mate Does
Cylinder Fill Calculator
Calculate fill quantities for NZ refrigerant cylinders quickly on-site
LAB Lookup
Fast lookup of refrigerant labels, safety data, and handling requirements
Compliance Tools
NZ refrigerant compliance references for technicians in the field
Supplier Deals
Exclusive offers and promotions from NZ trade suppliers each month
Free
Gas Cylinder Mate is completely free for all registered NZ refrigerant technicians. Register once and get instant access — no subscription required.
Who Are These Apps For?
EzeCalc is built for
- HVAC designers and consultants
- Refrigeration and air conditioning contractors
- Heat pump installers and technicians
- Building and energy assessors
- Anyone performing NZS 4218 heat load calculations
- Skillsure course graduates and members
Gas Cylinder Mate is built for
- Registered refrigerant technicians
- Refrigerant handlers and fillers
- HVAC service technicians in the field
- Apprentices learning refrigerant handling
- Anyone who needs quick cylinder fill data on-site
- NZ refrigerant compliance reference on the go
Join 1,100+ NZ Trade Professionals
Both apps are free to register. EzeCalc PRO unlocks the full toolkit from $10/month — or start with the free tools today and upgrade when you're ready.
No credit card required · Register in under a minute · Any smartphone or tablet