Ventilation & Heat/Energy Recovery

Passive House MVHR system

A key element of Passivhaus is building mechanical ventillation with heat (energy) recovery (MVHR); providing 100% fresh air all year round, for a healthy indoor environment, with high levels (upto 90%) of heat & energy recovery. Completely balanced (equal amount fresh air in to exhaust air out) ventilation to the entire building.

This helps dramatically reduce space heating & cooling requirements, whilst providing the highest levels of comfort.

Options of night bypass cooling, heating/cooling via heat pump are available.

We design, supply and install building MVHR systems from Mitsubishi and Stielbel Eltron, to achieve ventilation and heat/energy recovery requirements, with minimal noise transmission. 


Mitsubishi Lossnay product range

Mitsubishi Lossnay product specification 

Stiebel Eltron LWZ product range 

Stiebel Eltron LWZ 70/170/270plus datasheet 

Stiebel Eltron LWZ 370plus datasheet 

Passivhaus Institut Certification

Stiebel Eltron LT 50 ductless ERV


Passive House offers a complete MVHR design service.

We design and install MVHR systems to comply with Australian and European standards.

We provide full design calculations, ducting and layout drawings with detail item lists.

Also careful consideration of sound attenuation to minimise noise transmission.


For a MVHR system to be effective, it needs to be in conjunction with a building air-tightness system in construction.

ASHRAE provides clear guidance on when MVHR (balanced ventillation is necessary):


European standards are very similar.

Air infiltrartion must be verified by Blower Door Testing.

Buildings with high levels of air infiltration do not require balanced MVHR systems.


For system design, supply & install please contact Passive House


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