Ventilation & Indoor Air Quality Guides
Clear, practical information for New Zealand homes.
Choosing ventilation is easier when you understand what the system is actually trying to achieve. These guides explain moisture, indoor pollutants, extraction, ventilation technologies and the practical differences between system types.
EVOAQ's approach is based on understanding the causes of indoor air-quality problems and responding intelligently rather than simply running a fan at one fixed speed.
The Complete Indoor Air Quality Guide
A comprehensive look at humidity, condensation, VOCs, demand-controlled ventilation, decentralised ventilation and practical IAQ strategy.
Read the IAQ Guide →How to Stop Condensation in NZ Homes
Understand why condensation forms, what it tells you about indoor moisture and why ventilation is more useful than simply wiping windows.
Read the condensation guide →Positive Pressure vs Balanced Ventilation
Compare the basic operating principles and understand EVOAQ's decentralised balanced approach.
Compare ventilation types →How Much Ventilation Does a House Need?
Explore airflow, room use and the principles behind designing an effective whole-home ventilation strategy.
Read the guide →Extraction vs Ventilation
Understand why whole-home ventilation and source extraction solve different problems—and why good homes often need both.
Learn the difference →Heat Recovery vs Ventilation
A practical comparison of heat-recovery ventilation and other ventilation approaches for New Zealand homes.
Read the comparison →Healthy Homes Ventilation Requirements
Information on ventilation and extraction requirements relevant to New Zealand rental properties.
View the guide →The Myth of Dehumidifiers
Look at the difference between removing moisture from air and controlling the sources that create indoor moisture.
Read the guide →Best Ventilation System for NZ Homes
A practical guide to choosing a system based on the home, its construction, occupants and indoor-air-quality goals.
Read the guide →Not sure what your home needs?
Talk to EVOAQ about the moisture, ventilation and air-quality issues you're trying to solve.