How does Lossnay Fresh Air Home Ventilation work?

Designed in Japan for New Zealand conditions, the Lossnay Fresh Air Ventilation system works by extracting stale air from inside your house to remove damp, odours, dust, bacteria and gasses. This air is then replaced with allergen reduced fresh air from outside (unlike some systems that recycle it from the dust-filled attic). Where Lossnay gets really clever is with its environmentally friendly 'Energy Recovery' system. Put simply, energy within the stale air can be recovered and used to pre-heat or pre-cool the fresh air being vented in. So it warms the fresh air in winter, and cools it in summer.

Watch an example of a Lossnay Ventilation System

Lossnay energy recovery system

This unique system recovers heat energy present in the stale extracted air, the Lossnay core uses this energy to pre-heat fresh air as it is transferred inside. This also works in the reverse, if the outside temperature is higher than preferred levels, the inside air will be cooled by extracted air. The process is as follows.


  1. The stale air extracted from your home is (RA) Return Air. Return air can contain high levels of CO2, odours and other pollutants. This return air stream also contains energy that Lossnay can recover, which is often not the case with other ventilation systems.
  2. As the stale Return Air is removed, Lossnay’s core ‘recovers’ the useful energy from it. The air is then exhausted (EA) outside along with the unwanted pollutants.
  3. Outdoor Air (OA) is introduced to provide fresh air. It is first filtered, then passed through the Lossnay core. This allows it be pre-heated in winter (or pre-cooled in summer) using the energy recovered from the Return Air.
  4. Supply Air (SA) then enters your house as fresh pre-heated or pre-cooled air.

Learn more on how it works - LGH core example

Installation example for a healthier, drier home!

Example of a 4 outlet Lossnay Energy Recovery Ventilation System installed in your home with a simple to use contoller, just set it and forget - it will do the rest. This system is capable of supplying fresh air whilst reducing dampness, toxins and dust from your home.

This 4 outlet Lossnay Energy Recovery Ventilation Package would be ideal for ventilating an average New Zealand home.

Extracts air

Extracts stale air removing toxins and reducing humidity.

Supplies fresh air

Supplies fresh air increasing the oxygen levels in the home and preventing the build up of moisture.

Lossnay energy recovery unit

Recovers the heat from the outgoing air to preheat the incoming air, saving you money.

Lossnay will ensure the air in your home stays fresh, clean and dry. And because you’re retaining the warmth, you’ll save on your heating bill as well.

Remember that no ventilation system in the market can heat your home, this is especially the case at night and on cold winter days. To accompany the fresh air that Lossnay will supply to your home, we suggest using a Mitsubishi Electric Heat Pump to warm the air in your home, providing you with a healthy and comfortable living environment all year round.

How Lossnay works