Article – Hugh GrantThe launch comes as many households hit the hardest part of Winter. Damp, poorly ventilated houses are linked to mould growth and respiratory issues, and they also cost more to heat.A free online tool that scores your home’s winter health out of 100 has launched, giving Kiwi homeowners a two-minute snapshot of how their house is coping with the cold. The launch comes as many households hit the hardest part of Winter. Damp, poorly ventilated houses are linked to mould growth and respiratory issues, and they also cost more to heat. The quiz is designed for anyone living in a New Zealand home, whether they own it or rent it.