How Lossnay Fresh Air Heat Recovery Ventilation Can Assist with Homestar Certification

The New Zealand Green Building Council's Homestar certification represents a significant step forward in the creation of sustainable living spaces within New Zealand. By adhering to Homestar's guidelines, builders and architects commit to creating homes that are healthier, warmer, drier, and more comfortable, all while consuming less power and water compared to homes built to the minimum standards set by the New Zealand Building Code.

Mitsubishi Electric Lossnay Ventilation Systems not only help with the minimum ventilation requirements for Homestar certification, but also offer up to 5 points towards Good, Best and World Leading Homestar ratings by improving energy efficiencies and indoor air quality.

Homestar homes go beyond the New Zealand Building Code

A Homestar certified home exceeds the baseline requirements of the Building Code, incorporating advanced design and building practices that ensure higher levels of thermal performance, energy efficiency, and use of healthy, sustainably sourced materials. This commitment to sustainability not only addresses the immediate needs of homeowners for a better living environment but also contributes to the broader environmental goals of reducing carbon footprints and promoting sustainable development practices across New Zealand's residential sector.

The ventilation credit criteria in Homestar Design

Ventilation plays a crucial role in Homestar's assessment framework, particularly in alleviating indoor moisture, improving air quality, and reducing the risk of respiratory illnesses and mould. Homestar rewards designs that incorporate effective ventilation strategies, offering up to 5 points for integrating and commissioning a balanced pressure Mechanical Heat Recovery Ventilation (MHRV) system like Mitsubishi Electric’s Lossnay.

There is a mandatory minimum of ventilation points for each star rating:

System Type	Points	Achievable Rating
Continuous Extract Ventilation System To achieve 0.35 acph of the entire home OR achieve 7.5 L/s per person, whichever is higher. EC motors to be equipped to minimise noise and to achieve a higher efficiency.	2-3* Points	Homestar 6 & 7 Homestar 8*
Balanced Ventilation System To achieve 0.35 acph of the entire home OR achieve 7.5 L/s per person, whichever is higher.	3-4* Points	Homestar 6, 7 & 8 Homestar 9 & 10*
Balanced Ventilation System with Heat Recovery To achieve 0.35 acph of the entire home OR achieve 7.5 L/s per person, whichever is higher. Ducting to be insulated with the equivalent of at least 25mm with thermal conductivity more than 0.04 W / (m.k).	4-5* Points	Homestar 6, 7 & 8 Homestar 9 & 10
acph = air changes per hour * Additional 1 point can be attained through commissioning of each of the above system.   Source: HomeStar V5 Technical Manual, HC3: Ventilation pg. 52, published 18 November 2022, NZGBC.

Mitsubishi Electric Lossnay Fresh Air Heat Recovery Ventilation can help maximise points

Designed in Japan for New Zealand conditions, Mitsubishi Electric Lossnay is a balanced pressure fresh air ventilation system with heat recovery that is ideal for almost any New Zealand home, from apartments and townhouses, to large standalone dwellings. Boasting impressive heat exchange efficiencies up to 93%** with noise levels as low as 14 dBA†, Lossnay systems allows you to achieve the maximum number of points* for each of the Homestar ratings, compared to selecting other ventilation systems.

Lossnay Units for Homestar

There are a wide range of Lossnay units that are able to achieve high Homestar scores. The Lossnay range covers both vertical and horizontal mounted units, and extraction from wet or dry areas.

Contact Mitsubishi Electric to learn more about Lossnay Fresh Air Heat Recovery Ventilation, or visit www.mitsubishi-electric.co.nz/ventilation

* Additional 1 point can be attained through commissioning of each of the above system.
** LGH-50RVS on lowest fan speed. 
† VL-220C2GV on lowest fan speed. Measured at 1.5m.

LGH-RVX Lossnay Fresh Air Energy Recovery Ventilation — Residential & Commercial

Mitsubishi Electric

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The Lossnay in-ceiling LGH-RVX range of balanced pressure energy recovery ventilation units draw fresh, filtered air in and draw stale air from internal spaces while retaining healthy indoor humidity levels.

A wide range of models allows makes the Lossnay LGH-RVX suitable for both residential and commercial applications.

Available in 9 sizes 42 l/s, 69 l/s, 97 l/s, 139 l/s, 181 l/s, 222 l/s, 278 l/s, 417 l/s & 556 l/s (on highest fan speed)

Typical applications include but are not limited to:

Hospitals & age care facilities
Educational facilities
Commercial spaces such as office, library and community halls
Residential sector which includes retirement homes, B&B, and private properties

Meets H1/VM3 ventilation system control requirements and exceeds the condition of minimum sensible heat transfer effectiveness of 60%
Units are designed to meet and comply with JIS B 8628 for thermal efficiency performance standard.
All Lossnay units hold an ESS supplier declaration of compliance, in accordance with regulation 101A of the electricity regulations 1997
Models are designed to meet and comply with G4 regulation and AS NZS 4303:1990*
*Please note the appropriate model needs to be sized and selected by the Architect, Engineering Consultant or Designer of specific projects to further ensure it complies with relevant standards.

LGH-RVS Lossnay Heat Recovery Ventilation for Wet Areas — Residential & Commercial

Mitsubishi Electric

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The in-ceiling LGH-RVS Lossnay Sensible Heat Recovery Ventilation range brings fresh, filtered air in and draws stale air out from high-humidity areas such as bathrooms, kitchens and laundries.

Suitable to provide balanced heat recovery ventilation for commercial applications with an additional advantage of being able to extract moisture laden air from wet areas such as bathrooms, kitchens and laundries.

Mounted horizontally in the ceiling
Exchangeable Spigot connections to suit complex site installs
Multidirectional single drain connection
Available in three sizes 139 l/s, 222 l/s and 278 l/s (on highest fan speed)

Typical applications include but are not limited to:

Hospitals and age care facilities
Educational facilities
Student accommodation
Commercial spaces such as office, library and community halls
Hotels and motels
Recreation facilities such as gyms

Meets H1/VM3 ventilation system control requirements and exceeds the condition of minimum sensible heat transfer effectiveness of 60%
Units are designed to meet and comply ISO 16494 for thermal efficiency performance standard.
All Lossnay units hold an ESS supplier declaration of compliance, in accordance with regulation 101A of the electricity regulations 1997
Models are designed to meet and comply with G4 regulation and AS NZS 4303:1990*
*Please note the appropriate model needs to be sized and selected by the Architect, Engineering Consultant or Designer of specific projects to further ensure it complies with relevant standards

Vertical Lossnay Fresh Air Heat Recovery Ventilation for Below-Ceiling Installation

Mitsubishi Electric

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The slimline, Vertical Lossnay Fresh Air Heat Recovery Ventilation range is a balanced pressure mechanical ventilation system that extracts stale air and replaces this with fresh, filtered air from outside.

Suitable to provide balanced heat recovery ventilation to applications such as:

Residential homes
Commercial offices
Aged care facilities
Multi-story buildings where ceiling voids are limited

In addition extraction from wet areas is possible, for example; bathrooms, kitchens and laundries.

Advanced Lossnay Wi-Fi Control comes as standard with the Vertical Lossnay Range.

All Lossnay units hold an ESS supplier declaration of compliance, in accordance with regulation 101A of the electricity regulations 1997
Models are designed to meet and comply with G4 regulation & AS NZS 4303:1990*
Exceeds H1/VM3 efficiency requirements in commercial buildings
Mitsubishi Electric measures figures in a specification chart according to EN13141-7:2010, and characteristic curves are measured by chamber method
The sound power level measurement is performed according to ISO3744 with a hemi anechoic chamber
Advanced Wi-Fi Control comes as standard to control the unit remotely and make heat recovery visible

*Appropriate model needs to be sized and selected by the Architect, Engineering Consultant or Designer to further ensure it complies to meet the standard Project specific.

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