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The Vertical Lossnay Range is designed specifically for the New Zealand housing market and makes energy efficient, super-quiet ventilation accessible to even more homes.
Because of the slimline, vertical upright design, the Lossnay Ventilation System is not limited to an in-roof installation. With its small upright footprint it can be placed in the garage or a cupboard in the kitchen. Now whole home ventilation can be installed without compromising the architectural design of the building.
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Using the on-board temperature sensors, the Vertical Lossnay unit automatically enters Bypass Mode when it detects a space is hotter than desired and the outside air is cooler.
To reduce the risk of overheating the home, fresh air is introduced, bypassing the Lossnay Core. This is ideal for cooling down a dwelling that may have overheated during the day once the outside temperature has dropped in the evening.
*In comparison to using a dedicated cooling device. The unit will continue to use a small amount of power to bring colder fresh air from outside.
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A built-in LCD controller allows for easy control and commissioning of the unit. This interface displays all functionality and temperature settings of the system.
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The vertical upright design of the Lossnay Ventilation System is not limited to an in-roof installation. Now whole home ventilation can be integrated into the overall building design without limitations.
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The Vertical Lossnay unit now comes equipped with a G4 filter as standard—delivering advanced, medium-grade filtration to help keep your indoor air clean and healthy. It captures 99.99% of larger particles (up to 10 microns) and around 65% of finer particles as small as 1 micron.
Effectively filters out:
Pollen
Mold spores
Bacteria
Construction dust
Some viruses
A built-in solution for fresher air in homes, offices, and any space where air quality counts.
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Add intelligent moisture management to your Lossnay system with the optional humidity sensor. Easily installed on the return air duct and powered by the unit, it automatically adjusts airflow to maintain a comfortable, healthy environment.
Key features:
Monitors indoor humidity in real time (shown on controller)
Adjustable RH threshold (50%–90%)
Increases fan speed when humidity exceeds the set level
Maintains boosted airflow for 15 minutes, then returns to normal
Compatible with metal/plastic ducts under 20mm (plate required for flexible/EPP ducts)
A smart choice for controlling condensation, dampness, and air freshness.
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Enhance your Lossnay system with the optional wall-mounted CO₂ sensor, designed to maintain safe, fresh indoor air. Powered directly by the unit, it’s easy to install and automatically adjusts airflow based on CO₂ levels.
Key features:
Continuously monitors CO₂ (400–2,000 ppm*)
Automatically boosts ventilation when needed
Choose from three CO₂ threshold settings
Connect up to two sensors for broader coverage
Live CO₂ readings shown on the controller
A smart upgrade for healthier air in homes, schools, offices, and more.
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Elevating air quality and maximising energy efficiencies has never been easier, because now the power is in your hands.
See by how many degrees† Lossnay is pre-warming or cooling your home in real time, helping you save on your power bill because less additional heating is required to get a room up to temperature.
And in summer, monitor by how many degrees Lossnay reduces the average temperature in your home, using Automatic Free Cooling^ Mode.
The app will also proactively remind you when it is time to clean your filters to maximise both cost efficient operation and health benefits.
Lossnay Wi-Fi Control truly is the smart evolution in fresh air ventilation.
*The following compatible Lossnay models can be connected to the Wi-Fi Control Service via a compatible Wi-Fi Interface MAC-588IF-E: VL-250/350/500 Vertical, LGH-RVX-E-1 and LGH-RVS-E Series only.
†The outside ‘Fresh Air’ and the inside ‘Avg Temp’ air temperatures are measured by the built-in sensors that are centrally located in the main Lossnay Ventilation unit.
^In comparison to using a dedicated cooling device. The unit will continue to use a small amount of power to bring colder fresh air from outside.
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The Balanced Pressure Lossnay Heat Recovery Ventilation System removes stale, dirty air and draws in fresh air from outside. Lossnay also recovers heat energy from the air being transferred to pre-warm (or pre-cool) the fresh air being drawn into your home. Lossnay is ideal for small to large sized homes between 52m2 and 400m2.
The stale air extracted from your home is Return Air (RA). Return Air can contain high levels of CO2, odours and other pollutants. This Return Air stream also contains heat energy that Lossnay can recover, which is not the case with positive pressure ventilation systems.
As the stale Return Air is removed, the Lossnay Core ‘recovers’ the useful heat energy from it. The air is then exhausted (EA) outside along with the unwanted pollutants.
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.
Supply Air (SA) then enters your house as fresh pre-heated or pre-cooled air.