High performance heat recovery ventilation units with single-decker slim design to minimise installation space required.


  • New Hyper Eco Element Core - better energy conservation by improved total heat exchange efficiency
  • Extra Low Mode
  • New By-pass Ventilation  - reduces cooling load, night purge & office cooling
  • CO2 density sensor

Swap stale air for fresh and save on heating. The Lossnay Fresh Air Energy Recovery Systems set a new standard in ventilation by recovering heat from the air inside your home or office and transferring it to fresh, dry air introduced from outside. Not only providing energy recovery savings in winter by warming the cold fresh air to an acceptable level but also providing the same excellent energy efficiency in summer. Lossnay heat exchangers have an efficiency of approximately 82% thereby eliminating the need for additional electric elements. The Ventilation System for Enhanced Air Quality which provides Free Heating or Cooling.

LOSSNAY LGH-1500/200/250RVXT-E

Designed to save you money!

  • Without ventilation: Lack of Ventilation makes people sick by dirty indoor air including CO2, Dust, Bacteria.
  • You could open windows to bring in the fresh air, but opening windows waste much air conditioning energy.
  • New Hyper Eco LOSSNAY Core
  • New controller: PZ-61DR-E 7 Day Timer
  • Night purge and auto ventilation
  • Four new fans speed modes with fine control

Simple and Effective. Excellent air quality and unbeatable Heat Exchange Efficiency.

Poor air quality can be attributed to many problems arising in the workplace or the home. It is believed to contribute to a significant loss in productivity, low morale and higher rates of sickness among many employees. The object of providing good ventilation alongside air condition in residential and commercial buildings is to provide conditions under which people can live and work comfort and safety.

Developed and refined over the past 30 years, the LOSSNAY system has perfected the recovery of waste energy. The units reduce overall energy costs by extracting stale air and then recovering the heating or cooling energy to either warm and cool incoming fresh air. By utilising this energy, the LOSSNAY system can save up to 30% on initial capital costs of heating and cooling plant.

Energy-Recovery Concept by Hyper Eco LOSSNAY Core

Every building needs a supply of fresh air to keep its inhabitants healthy and comfortable. Outdoor air though is rarely, if ever, the same temperature as that maintained by the building's air conditioning system. In the summer, it is too hot. In the winter, it is too cold. The air conditioner is required to compensate for the intake of the hot or cold air adding to the expense of operating the system. LOSSNAY all but eliminates this problem with original energy-recovery technology that uses the heat of the stale indoor air to be expelled to either heat or cool the incoming fresh air to a temperature much closer to the existing indoor air. This process reduces the load on the air conditioning system without cutting off the supply of vitally necessary fresh air.

The basic principle

The remarkable technology that permits the intake of fresh air with minimal loss to indoor temperature is known as the LOSSNAY Core. The cross-flow, plate-fin structure of the energy-recovery unit along with a specially processed diaphragm keep supply and exhaust air separate, ensuring that only fresh air is introduced into the indoor environment while also allowing for the efficient transfer of heat.

The improvements

The microscopically small pores of the diaphragm have been made even smaller, decreasing the rate at which water-soluble gases such as ammonia and hydrogen pass through. Further, a new specially processed paper used to make the diaphragm has been developed with high moisture permeability characteristics that aid in the transference of moisture for improved energy exchange efficiency. These developments further improve moisture permeability and effectiveness in shielding unwanted gases, resulting in a lower rate of gas transference and more highly efficient energy transfer.

Heat-Exchange Efficiency Obtainable Only with Lossnay

The secret to the unmatched comfort provided by Lossnay core is the cross-flow, plate-fin structure of the heat-exchange unit. A diaphragm made of a specially processed paper fully separates inducted and exhausted air supplies, ensuring that only fresh air is introduced into the indoor environment.

The superior heat transfer and moisture permeability of the special paper assure highly effective total heat exchange (temperature and humidity) when inducted and exhausted air supplies cross in the Lossnay core.

Energy Saving by PZ-61DR-E 7 Day Timer.

The operation pattern for each day of the week, ON / OFF and air volume can be set using the weekly timer function (up to eight zones per day). Compared to previous models, much finer operation control contributes to enhanced energy saving operation. With a wider range of air volumes, the Lossnay RVX units enable optimised ventilation not just at different times of the day, but for various days of the week as well, allowing further energy savings.

Improved air volume range

The LGH-RVXT Series feature four fan speeds, and each speed has a range setting of 25%, 50%, 75% and 100%, allowing much finer air volume control. When used in combination with the CO2 sensor or timer function, the air volume can be adjusted according to conditions that realize better performance and reduce power consumption.


Night Purge By-pass Ventilation External Control Setting

During the summer season, the Night Purge mode draws cooler outside air into the room at night. This energy conservation mode reduces the load when the air conditioning is started up the next morning.

With previous models, the unit is operated with only one initially set condition. With new models, it is possible to set freely* the night purge operation for the start conditions, air volume, and operation time and flexibly answer to the operating environment requests that vary with each customer.

* Settings can only be made using the PZ-61DR-E

Automatic ventilation setting

The automatic damper mode automatically provides the correct ventilation for the conditions in the room. The following shows the effect “By-pass” ventilation will have under various conditions.

  1. Reduces cooling load. If the air outside is cooler than the air inside the building during the cooling season (such as early morning or at night), “By-pass” ventilation will draw in the cooler outside air and reduce the cooling load on the system.
  2. Night purge. “By-pass” ventilation can be used to release hot air from inside the building that has accumulated in buildings a business district during the hot summer season.
  3. Office equipment room cooling. During the cold season, fresh air can be drawn in and used as is to cool rooms where the temperature has risen due to the use of office equipment.

* When the outdoor air temperature drops lower than 8°C it changes to the heat exchange ventilation. (Display of the remote controller does not change.)
* In the case of “By-pass” ventilation, the supply air temperature slightly rises more than the outside air temperature because of the heat effect around the ducts or the unit motors




Specification Overview

Air Volume (m3/h) 1500 2000 2500
Static pressure Pa 175 175 175
Input power W 792 1000 1446
Noise dB 39.5 39.5 43
Temperature exchange efficiency % 80 80 77
Width mm 1500 1500 1500
Depth mm 1980 1980 1980
Height mm 500 500 500
Weight kg 156 159 198

* Specifications are for heat recovery mode. For by-pass ventilation specifications, please consult the brochure.

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  • New Hyper Eco Element Core - better energy conservation by improved total heat exchange efficiency
  • Extra Low Mode
  • New By-pass Ventilation  - reduces cooling load, night purge & office cooling
  • CO2 density sensor

Related Products

Remote Controller - PZ-60DR-E

Remote Controller - PZ-61DR-E

Remote Controller - PZ-43SMF-E

Centralised Controller - AE-200E

Standard Filter - PZ-RF8-E

High Efficiency Filter - PZ-RFM-E


  • LGH-150RVXT-E
  • LGH-200RVXT-E
  • LGH-250RVXT-E