Lossnay Fresh Air Heat Recovery Ventilation System

Mitsubishi Electric has been supplying the NZ industry for almost 30 years with “balanced pressure” Lossnay Heat Recovery Ventilation Systems. While most ventilation systems are no better than opening a window letting valuable heat escape, Lossnay brings fresh filtered air in and recovers heat energy from the outgoing stale air which is then used to pre-warm or cool the incoming fresh air. The end result is a healthier, drier and warmer home whilst maximising energy efficiencies. The secret to Lossnay Heat Recovery Ventilation is its unique and highly efficient core, capable of temperature exchange efficiencies of up to 93%* which can significantly reduce the energy and cost to maintain the desired indoor temperature.

*LGH-50RVS on lowest fan speed.

Many other ventilation systems are “positive pressure” systems which can only introduce air into the home but not extract stale air, relying instead on the home to be sufficiently draughty in order to force the air out through cracks in windows and doors. As a result, this type of system is not capable of recovering usable heat from the outgoing air which is subsequently lost. With New Zealand homes becoming more and more airtight, positive pressure ventilation is no longer a viable solution.

• PPV: Air goes in and is forced out through the building gaps.

• BPV: Fresh air goes in while stale air is extracted out.

ERV systems feature The Diamond Core Classic – a permeable core which recovers sensible (temp) and latent energy (relative humidity). Whereas the HRV core is a treated non permeable resin core (Diamond Core Plus) which is capable of recovering sensible heat only, making it viable to use for extracting from wet areas.

Lossnay Heat Recovery units are therefore ideal for applications where air is being extracted from wet areas* including laundries or bathrooms.

*When extracting from a bathroom or wet area, other room(s) must also be connected to the return air ducting network.

Yes – Mitsubishi Electric offer a wide range of Lossnay types suitable for all installations.

In cases where the ceiling access hatch is too small to allow access or there is insufficient ceiling space, a Vertical Lossnay System which can be installed in the garage or cupboard and still have duct distribution run throughout the ceiling cavity.

An added advantage of the Vertical Lossnay Series is that the units are easily accessible for filter maintenance by the installer or end user.

If the ceiling cavity doesn’t allow for ducting runs, we recommend using the wall mounted single room Lossnay VL-100EU for rooms throughout the dwelling or in individual areas within the home where indoor air quality is a concern.

The primary function of Lossnay is to introduce fresh, filtered air into the home and extract stale air as a balanced pressure system, working in conjunction with heating and cooling devices but not replacing them.

Lossnay recovers usable warm or cool air from the outgoing air, transferring this via a heat exchange system to the fresh air being introduced, reducing the amount of energy required to maintain the desired indoor temperature, so your heating system isn’t required to work as hard.

Lossnay Ventilation units are fitted with a core that is either:

• Specially treated paper and permeable for energy recovery (VL-100, LGH-RVX).

• Water resistant or resin coated paper core, non-permeable for heat recovery, also suitable for wet rooms (VL-220).

• Plastic counter-flow heat exchanger, non-permeable for heat recovery, also suitable for wet rooms (LGH-RVS & Vertical Lossnay).

Earlier is always better when considering the appropriate ventilation system for your home to ensure enough room is allowed in the ceiling to run the ducts and accommodate an in-ceiling system if that is the preference.

Initial planning also helps project utilities required (power and plumbing, condensate drain requirements) and allows enough room to mount and access the unit for the purpose of future maintenance.

Yes, Lossnay is the ultimate solution to complement ducted air conditioning systems for a total heating, cooling and whole home ventilation system.

Having Lossnay integrated to ducted air conditioning allows for several control options that the installer/end user can choose from, depending on the application and user preference:

Option 1- Control both the Lossnay and ducted air conditioning via the same wall mounted controller PAR-40MAA. This provides greater convenience to the end user, however this configuration will limit some of the additional functionality of the Lossnay system which is restricted to on/off and low/high fan speed control.

Option 2- Individual separate controls for the Lossnay and ducted air conditioner. In this configuration the Lossnay connects to its own PZ-62DR controller and retains all of its additional functionality, including bypass, 4 fan speeds, boost and weekly timer. The air conditioning system connects to the PAR-40MAA controller.

Please note: Irrespective of what above options are used, they will still require the ducted system to always operate on fan mode even when not cooling or heating.

Mitsubishi Electric prides itself in supplying the quietest and highly efficient systems and Lossnay is no exception to that. Some of the models can perform as low as 14dBA†, at the same time being highly efficient, delivering up to 93% sensible heat exchange*.

† VL-220CZGV on lowest fan speed.

*LGH-50RVS on lowest fan speed.

Most Lossnay Heat Recovery Ventilation units are equipped with standard G3 filters which can be cleaned on a regular maintenance cycle (approximately 1 per year, but the frequency of maintenance can be increased based on how dirty they get), the filters can be vacuumed or washed with mild warm water.

For higher levels of filtration, we also offer high efficiency filters if required.

The core can be easily removed for cleaning, and we recommend this be done once every two years.

For Lossnay units with energy recovery, you should only vacuum or wipe the core with a dry cloth, whereas the heat recovery core can be washed.

Contact us to book a Lossnay service.

Most Lossnay Systems have an integrated bypass damper equipped within the unit, except for the VL-220 model where it is an option only, requiring a separate bypass damper (available separately). Using on-board temperature sensors, the Lossnay unit will automatically enter 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. This allows for free cooling/night purge by either setting it to bypass mode manually or left on auto for the unit to sense and function intelligently.

*Not applicable to single room Lossnay.