---
title: What Is an Energy Efficient Home?
description: "**Short answer:** An energy efficient home is designed to maintain a consistent, comfortable indoor temperature using significantly less energy. It does this through insulation, airtightness, high-performance windows, and controlled ventilation working together as a system. ## Overview Most homes in…"
url: "https://energyefficienthomes.co.nz/docs/what-is-an-energy-efficient-home/"
updated: "2026-04-28"
---

# What Is an Energy Efficient Home?

**Short answer:** An energy efficient home is designed to maintain a consistent, comfortable indoor temperature using significantly less energy. It does this through insulation, airtightness, high-performance windows, and controlled ventilation working together as a system.

## Overview

Most homes in New Zealand are built to minimum building code requirements. While compliant, these homes often struggle with heat loss, draughts, and moisture. An energy efficient home takes a different approach - focusing on how the home performs year-round, not just how it looks on completion.

What Makes a Home Energy Efficient?

## Insulation

Higher insulation levels slow heat transfer, keeping warmth inside during winter and outside during summer.

## Airtightness

Reducing uncontrolled air leakage eliminates draughts and improves temperature consistency.

## High-Performance Windows

Windows are one of the biggest sources of heat loss. Better-performing joinery and correct placement dramatically improve comfort.

## Ventilation

A controlled ventilation system introduces fresh air while retaining heat, helping manage moisture and indoor air quality.

## Energy Efficient vs Standard NZ Homes

Most standard homes: - Lose heat quickly - Have inconsistent temperatures between rooms - Rely heavily on heating systems - Struggle with condensation and moisture Energy efficient homes are designed to avoid these issues from the start.

## Why It Matters

A well-designed home should feel: - Warm in winter without constant heating - Cool in summer without overheating - Dry, with minimal condensation - Comfortable in every room This is the baseline expectation in many parts of the world - and it's increasingly what homeowners in New Zealand are looking for.

## Common Questions

### Are energy efficient homes more expensive?

They can cost more upfront, but the long-term comfort and reduced running costs often
 outweigh the initial investment.

### Do they need heating?

Yes, but far less than a standard home.

### Are they the same as Passive Houses?

Not necessarily. Passive House is a specific standard. Energy efficient homes can vary in
 performance depending on design.

## Related Articles

- What are the benefits of an energy efficient home?
- Passive House vs standard NZ homes
- Why insulation matters in NZ homes

## Next Step

If you're planning a new home and want to understand what level of performance is possible, our team can help guide you through your options.