Heat Recovery Ventilation
Until now, Australian buildings relied on passive ventilation sources like vents and windows for fresh air. This is changing. Passive sources of ventilation make it difficult to heat and cool the building efficiently because they allow heated or air-conditioned air to escape from the structure. With the increasing trend toward sustainable building practices, builders are moving away from passive ventilation to keep the building sealed. Although this reduces a building’s carbon footprint, it leaves its inhabitants without a source of fresh air. So, we need a new way to provide the building with adequate ventilation, without sacrificing the efficiency gained by sealing the building.
Installing a centralised heat recovery system with a unit from Stiebel Eltron’s LWZ series does exactly this. It creates a fresh air source while maintaining the building’s internal temperature. Plus, like all good ventilation systems, it improves the building’s air quality by removing pollutants such as dust, moisture and pollen.
Why Use a Stiebel Eltron LWZ series unit in your Heat Recovery System
A building with heat recovery will have at least one set of air intake and outtake points on its outside. Each external vent corresponds with a vent inside the building. The internal and external points are connected via ducting which runs through a mechanical ventilation unit with heat recovery, like an LWZ unit. As the air is extracted from indoor spaces, it passes through the heat recovery unit, which retains most of the air’s heat energy. Air entering the building through this system also passes through the unit, gaining the heat energy from the outgoing air stream. The two air streams don’t mix, so moisture and other pollutants are extracted with the outgoing air.
Units from the LWZ series work as the central component of a centralised HRV system. Based on design and performance, they’re suitable for apartments, houses and small commercial properties.
- Achieves heat recovery efficiency of up to 94%
- “Bypass” functionality for cooling effect in Summer
- Includes Energy Recovery Ventilation core gives you the option of latent energy and humidity management
- Control appliance directly from the unit using inbuilt display
- Optional FEB remote control available as an accessory
- Changing the filter is easy using combi filter cassettes
- Prevent pollen build-up
- Passive House certified components.
Is centralised HRV right for me?
A centralised heat recovery system uses a single unit to service a whole residence or building. It works best for buildings with minimal air leakage where it provides a fresh source of air. If you’re looking for ways to make your home or building more efficient, minimising the amount of energy you use for heating and cooling is a great step to take. Heat recovery systems are not designed to replace a heater or air conditioner, but to minimise your use of these appliances.
Heat Recovery also maintains overall air quality in the home and even helps prevent mould growth and excess condensation.
If you have an older home, decentralised heat recovery system may be a better solution for you.
Your building project is unique, so it needs a unique solution. Our team will work with you to design a heat recovery system to suit your home. Through our consultation process, you will learn which heat recovery unit is best suited to your application as well as how to layout the system in your home.