This house is a good example of a passive solar healthy home and how a healthy home can still result in a beautiful and extremely energy-efficient home. Its simple design and features prove that energy-efficient homes can look and feel beautiful and still work, even in the challenging climate of Blackheath.  The exterior walls of the house are 400mm-thick lime rendered strawbale rated at R7.1,   and the internal walls are 100mm earth-rendered cob. This combination provides an insulating perimeter with a core of thermal mass to moderate and stabilise the internal temperature. The clay and lime renders allow the walls to breathe which adjusts the internal humidity to be between 40 to 70 per cent.  With careful placement of windows, doors, eaves and external shading, summer heat gain is minimised, while still allowing winter sun into the house. The windows and doors are timber framed and double glazed to further improve heat control. The site is also in a bushfire zone.  It is a worthy winner of the 2020 Excellence in Energy Efficiency Awards.