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 ratings and their total qualifying points from Homestar V5
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. |
2-3* Points |
Homestar 6 & 7 |
|
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 |
|
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. |
4-5* Points |
Homestar 6, 7 & 8 |
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 allow you to achieve the maximum number of points* for each of the Homestar ratings, compared to selecting other ventilation systems.
* 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.
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.
Case Study: 7 Homestar Victoria Lane Apartments, Wellington
Victoria Lane Apartments is a new Wellington development featuring 123 premium apartments in the heart of the capital’s CBD. By incorporating Mitsubishi Electric Lossnay Ventilation, the project was able to achieve 5 points towards the 7 Homestar Rating.