Launceston, Tasmania's second-largest city, sits within NatHERS climate zone 26, the same cold climate zone as Hobart. Located in the Tamar Valley in northern Tasmania, Launceston experiences cold winters with temperature inversions that can trap cold air in the valley, creating particularly frosty conditions. NatHERS assessments in Launceston prioritise heating performance, ensuring new homes are designed to maintain warmth through the long cold season while managing the occasional warm summer day effectively.
Launceston's climate zone 26 features cold winters that can be even more severe than Hobart due to the valley location and temperature inversions. Frost is frequent and heavy from April through October, with overnight temperatures regularly dropping well below zero. The Tamar Valley funnels cold air into the city, and fog can persist for days during winter. Summer temperatures are mild, occasionally reaching the low 30s during heatwaves. The valley location means solar access can be limited by surrounding terrain, making building orientation and site planning particularly important. Substantial ceiling, wall, and underfloor insulation, combined with high-performance glazing and excellent draught sealing, are essential for achieving compliance and comfortable living conditions in Launceston.
New homes in Launceston must achieve a minimum 7-star NatHERS rating under NCC 2022, with assessments evaluated against climate zone 26 data. The heating-dominated assessment heavily weights the building's ability to retain warmth, with insulation, glazing, draught sealing, and northern solar access being the primary design levers. Assessors must account for Launceston's valley microclimate, which can create colder conditions than the standard zone 26 climate data suggests for some sites.
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