Auckland's Climate Action Plan

A little vent helps avoid a lot of Mould

Any replacement window frame should include a trickle vent. This allows a small vent path to the house without needing windows to be left open educing mould and condensation

How can we make our existing buildings healthier, more efficient and climate proof?

This is not my idea - In the UK there was a rapid change to existing buildings that included PVC windows and doors, insulation under floors wall cavities etc. House that were well ventilated by leaks became air tight and became mouldy - even though they were warmer. I have noticed the the last two new built houses we have had do not allow for continuous ventilation unless you leave large windows open - I approached a frame manufacturing and they could not understand the point. 

How can we support Auckland to transform our built environment to be resilient to our changing climate, zero carbon and most importantly healthy places to live?

Many houses will get improved insulation but will not self ventilate - Lets allow our houses to breathe and stay mould free install trickle vents. Retro vents are available in NZ and should be encouraged

Climate Primate 2 months ago

Can someone please add an explanation of how the health and efficiency of our homes became a climate change/climate action issue?
SR1.5 says "Poverty and disadvantage are expected to increase in some populations as global warming increases; limiting global warming to 1.5°C, compared with 2°C, could reduce the number of people both exposed to climate-related risks and susceptible to poverty by up to several hundred million by 2050 (medium confidence)." So we can have a 'several hundred million' person impact by meeting new ambitious and stringent emissions reductions between now and 2022, now and 2025, and now 2030. That is the window SR1.5 proposes -
"C.1.2. Modelled pathways that limit global warming to 1.5°C with no or limited overshoot involve deep reductions in emissions of methane and black carbon (35% or more of both by 2050 relative to 2010). These pathways also reduce most of the cooling aerosols, which partially offsets mitigation effects for two to three decades."
"Non-CO2 emissions can be reduced as a result of broad mitigation measures in the energy sector..." but in New Zealand we have a higher input of renewable energy than almost any other countries, and it follows home energy efficiency is not as significant as it is elsewhere.
The New Zealand challenges are clearly around reducing our vehicle emissions and managing a fast reduction in agricultural emissions.

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Tim Rainbow 1 month ago

The energy consumed within the house is a significant contributor to climate influences. If you had lived pretty much anywhere else in the world you would realise just how backwards the NZ housing stock is. Have you noticed any difference in the atmosphere around our major cities now that some control is in place over coal burning and open fires. The poor design of ventilation even in modern houses means that you cannot adequately ventilate a house without fully opening a window or worse still partly opening a ranch slider. Thus you require much more energy to reheat the house to a healthy 22C. The other question is how will we heat our homes and water when the natural gas supply is gone/too expensive - so this is totally linked to climate change and home economics.

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Climate Action 1 month ago

Kia Ora Climate Primate, thanks for your comment. You’re right that New Zealand’s main challenges are around agriculture and transport. For Auckland, agriculture makes up 6.4%, while transport makes up 43.6% of our total greenhouse gas emissions. While renewable energy supply to homes is a key driver in reducing emissions, the location of homes, the built environment and communities must also be considered to ensure climate resilience.

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Tim Rainbow 2 months ago

Much discussion on installing heaters in houses ( even heat pumps) and then opening windows. It should be a good house design that allows passive energy/vented heat exchangers/trickle ventilation that reduce the average energy load of an house from say 2kw to under 1kw. The recent blocking of gas exploration also means significant change to the building code and best practice so more expensive electricity will become the primary heat source. The two subjects are bound together like fish n chips

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