Lossnay / HRV Systems
Breathe fresh air without throwing away conditioned energy.
Heat Recovery Ventilators (HRVs) — of which Mitsubishi's Lossnay is the leading example in Australia — provide whole-building or whole-floor mechanical ventilation while recovering the energy from the air being exhausted. The core of the system is a cross-flow heat exchanger through which two separate airstreams pass: fresh air in, and stale air out.
The two streams pass over opposite sides of a permeable paper or aluminium core, transferring heat (and in enthalpy systems, moisture) without mixing. In winter, the outgoing warm air pre-heats the cold incoming fresh air. In summer, the outgoing cooled air pre-cools the hot incoming air. This reduces the load on the main air conditioning system significantly.
HRV systems are increasingly mandated in NCC/BCA-compliant commercial buildings and are highly regarded in passive house and near-passive residential designs. They are an integral component of good indoor air quality strategy.
Common Installations
Passive House & Low-Energy Homes
Essential in airtight envelopes — provides fresh air without thermal losses.
Apartments
Each apartment can have its own HRV unit ensuring fresh air without opening windows.
Commercial Office Fitouts
Satisfies minimum fresh air requirements of AS 1668.2 with minimal energy penalty.
Hotels & Student Accommodation
Individual unit per room or centralised floor-by-floor system.
Schools
Continuous low-level fresh air maintains CO₂ levels below 1000ppm for optimal learning.
Ready to install a lossnay / hrv system?
Our team handles everything from design and supply to installation and commissioning across Greater Sydney.