An RMIT University-led report, commissioned by RACE for 2030, assessed current challenges related to home thermal efficiency improvements.
The report recommends several priorities to help Australia reach its goal of net zero by 2050, such as improving how we build new homes and how households prioritise and undertake thermal upgrading of their homes.
While the introduction of the new seven-star energy efficiency building standards is a necessary step to improve new homes, Rajagopalan said more needs to be done during the design and construction stage of building to ensure each home is thermally efficient.
A potential solution was creating a “One-stop shop” on how to embark on retrofitting your home and the benefits of a thermally efficient home from verified sources.
But reaching that goal would hurt profits…
Bruh make rentals have mandatory insulation or something, we spend 100kwh a day in heating the house to 18C with a reverse cycle heat pump system
Haha heating to 18C right now during the winter, it’s 3-10C at night and 13-19C durung the day. Aussie here too
Which part of Aus? Sounds cold. What’s the house made out of?
Did you see that article about how anything under 16 is bad for your health?
this is absolutely needed. a minimum viable energy efficiency standard in order to lease to renters. if it doesn’t meet the minimum standards sell it to someone who will upgrade it or build a new property
would love to see a speedy rollout and approach to this but that feels like i’m asking too much
We moved into a relatively new house in Jan, we didn’t think anything needed doing. We’ve found out terribly thermally inefficient. Since moving in we’ve installed roof heat extractor, ceiling insulation, garage door insulation and we’re thinking about getting the windows tinted before summer.
Does the tint cut the heat coming through?
Our old place we put 5 extractors on with closable vents in each room because the roof was a skillion and couldn’t clear it with 1 or 2. Made a big difference in Summer.
Depending on the type of tinting, yeah it can cut quote a lot of heat coming in. You have to balance how much heat to cut vs how dark the tinting will be though.
I’m intrigued about insulating garage door, I didn’t know that was possible. Did it make the temperature more stable in winter & summer in the garage? Did it have an impact to temperature inside your house?
We’ve done it to a double wide panel door facing west, the garage was sweltering in summer and lost a lot of heat in winter. The laundry was in there, so it got used a fair bit.
The insulation was styrofoam panels that wedged into each of the panels of the door. Seemed to help a bit in summer, but I also should’ve added brushes to the sides to close the gap on either side.
We need performance based standards not fluffy star rating systems. Or at least tie stars to a performance standard.
I.e. kW power required to keep building at habitable temperature in given conditions. +Blower door test to prove air tightness standards met.
Isn’t that sort of what NatHERS already does? It’s measured in theoretical terms but it at least seems to estimate how much energy would be required for regulating temperature. Among many other things, it includes a section where it reports the “thermal performance” of both heating and cooling (separately) in terms of MJ/m^2.
As a side note, a 2015 Qld Govt report stated:
In 2009 it was anticipated that the move to 6-star housing would generally increase building costs by around 1.25 per cent on average depending on the home’s design, size and location
It also noted that this would result in cheaper ongoing energy costs, but I wonder if some sort of up-front rebate or stamp duty discount or something could help incentivise building at 6 or 7 stars NatHERS.
