---
title: How Passive House Ventilation Systems Work
description: "## Short Answer Passive House ventilation systems continuously supply fresh air while recovering heat from outgoing air, maintaining comfort and efficiency. ## Overview Ventilation is essential in airtight homes. Passive House systems ensure air quality without sacrificing energy performance. ##…"
url: "https://energyefficienthomes.co.nz/docs/how-passive-house-ventilation-systems-work/"
updated: "2026-04-28"
category: Passive House
---

# How Passive House Ventilation Systems Work

## Short Answer

Passive House ventilation systems continuously supply fresh air while recovering heat from outgoing air, maintaining comfort and efficiency.

## Overview

Ventilation is essential in airtight homes. Passive House systems ensure air quality without sacrificing energy performance.

## Key Points

- Stale air is extracted from wet areas.
- Fresh air is brought into living spaces.
- Heat is transferred between the two air streams.
- This provides fresh air at all times, reduces heat loss, lowers humidity, and improves comfort.
- Without proper ventilation, moisture builds up, air quality drops, and comfort is reduced.

## Common Questions

**Is it expensive to run?** Typically very efficient.

**Do I need to maintain it?** Yes, simple filter changes and servicing are required.

## Next Step

If you are planning a new home, our team can help you understand what level of performance is possible and where to focus your budget.