DECO3200 · Week 4 Pitch

Understanding
the Invisible

Apartment residents' experiences of energy use. A study of university students renting in Sydney who pay for electricity they cannot see.

ElectricityQuarterly
$487.60
Total amount due
— and that is all it says.
The challenge

A bill arrives with one number on it, and no way to open it.

Can't see

One total covers air conditioning, hot water, common areas and the performance of the building itself.

Can't attribute

The hot water system may run continuously inside a wall the resident never opens.

Can't change

Meter rooms are locked. Some buildings sit on embedded networks. And the resident is renting.

Drag to rotate · click a floor
One apartment Shared & fixed load
Why it matters

Renters carry the worst housing and the highest bills.

1in5
Australian households experiencing energy hardship, or at risk of it. Renters are over-represented across every indicator.
Households in or near hardship
+8%
What renters spend on electricity compared with homeowners in comparable properties.
Relative spend, owner = 100
Renter108
Owner100
80%37%
Insulation in owner-occupied homes, versus insulation in rental properties.
Dwellings with insulation
Owned80%
Rented37%
Energy Consumers Australia (2025) · AHURI Final Reports 338 & 400
Insight 01 — Survey, n=38 · 34 full-time uni students

So they guess.

2.87/5
Average confidence in identifying which appliance uses the most electricity.
12345
31 of 38 rated themselves 3 or below
"How do you determine which appliances consume the most electricity?"
"Common sense"
"By past experience"
"No idea"
"I don't care"
"TikTok is really great"
Insight 02 — Survey, n=38 · 34 uni students  · the turn

They are already
saving.

18/38
described cutting back on their own — switching off lights, unplugging devices, giving up air conditioning.
"I stop using air conditioner any more"
"close all the unnecessary light"
"run the AC only during daytime and turn it off at night"
"Using air conditioning 6 hours per day cost me $270 last month, so I just stop using it." Respondent 23
They don't lack motivation. They lack a way to know which one to cut.
Insight 02, continued — one respondent, two answers

Cutting blind has a price.

R05
Q21 — What did you do?
"Having more detailed, real-time information would make it much easier to know where energy could actually be saved."
R05
Q28 — What would worry you?
  • [x]The information is inaccurate or misleading
  • [x]Anxiety about what counts as normal usage
  • [x]Forced to sacrifice the comfort of life
53%
fear being forced to give up comfort
50%
fear anxiety about normal usage
Without attribution, the only way to save is to cut the most visible thing. The saving is paid for in comfort.
The opportunity

Help residents know which one to cut — instead of cutting everything.

Better aim means a real reduction in consumption rather than a reduction in comfort — the same effort, spent where it actually moves the meter.

Appears only when something changes
Always watchingCompletely invisible
CoreAttribution
Split the total

Separate what the resident caused from what the building caused.

OpenTrigger
Stay silent

Surface an explanation only when consumption actually changes.

OpenHandoff
Hand over evidence

Turn the finding into something a resident can take to a retailer or landlord.

Why this is a climate project

Willingness isn't the bottleneck. Aim is.

Already willing

18 of 38 residents are actively cutting consumption without being asked, prompted or incentivised.

Cutting the wrong thing

Without attribution they cut what is most visible — the air conditioner — which may not be the largest load in the apartment.

Missing the big share

Hot water, insulation and shared services often carry the larger load, and stay invisible until the total can be split.

Blindsame effort, small cut
Aimedsame effort, real cut
Attribution is what turns willingness into actual reduction.
What happens next

Four things before we commit.

01
Interview 6–8 student renters
Testing one thing: what makes an explanation trustworthy enough to act on, without creating anxiety.
02
Recruit the residents we missed
10 of our 38 have electricity bundled into rent. Seven of them can see nothing at all.
03
Converge on one branch
Attribution is the core. Whether it stays silent, and whether it hands over evidence, is what interviews decide.
04
Prototype the explanation, not the dashboard
Test one bill, explained three ways, with students — and measure whether it reads as help or as surveillance.
Students are already trying. We want to make the trying count.
Method & sources

How we got here.

01 · Harvest
Read the complaints

17 public threads where Australian renters and share-house residents argue about an electricity bill they cannot explain.

02 · Cluster
Affinity mapping(online ethnography)

Grouped the quotes until three recurring shapes held: the total is unsplittable, blame lands on a person, the aircon takes the fall.

03 · Test
Survey, n = 38

Took the pattern back to residents to check whether it held outside the loudest threads — and what they would fear about a fix.

04 · Diverge
Crazy 8s on one axis

Sketched against always-watching versus invisible, then kept the three branches that survived both fears.

ReferencesAPA 7th
  • Am I overreacting? Powerbill splitting in share house [Online forum post]. (2026, March 4). Reddit. https://www.reddit.com/r/AmIOverreacting/comments/1rkikif/am_i_overreacting_powerbill_splitting_in_share/
  • Electricity bill is quite high—Hoping for some advice [Online forum post]. (2026, January 3). Reddit. https://www.reddit.com/r/AusFinance/comments/1q2mj1h/electiricty_bill_is_quite_high_hoping_for_some/
  • Electricity bill for my 1 bedroom apartment is higher than a 4 bedroom home [Online forum post]. (2022, October 30). Reddit. https://www.reddit.com/r/AusFinance/comments/yhrpin/electricity_bill_for_my_1_bedroom_apartment_is/
  • Embedded electricity network—Help? [Online forum thread]. (n.d.). Whirlpool Forums. https://forums.whirlpool.net.au/archive/2429061
  • Extremely high electricity bill [Online forum thread]. (2016, September). Whirlpool Forums. https://forums.whirlpool.net.au/archive/2564161
  • High energy bill (2024) [Online forum post]. (2024, April 24). Reddit. https://www.reddit.com/r/AusFinance/comments/1cbnjto/high_energy_bill_2024/
  • Housemate plotting to boycott our electricity [Online forum post]. (2025, December 21). Reddit. https://www.reddit.com/r/AusLegal/comments/1prurou/housemate_plotting_to_boycott_our_electricity/
  • Housemates and aircon [Online forum post]. (2022, March 19). Reddit. https://www.reddit.com/r/sydney/comments/throim/housemates_and_aircon/
  • How much is your usual electricity bill per quarter? Ours is now $3k and this seems insane to me [Online forum post]. (2024, June 22). Reddit. https://www.reddit.com/r/sydney/comments/1dlmzon/how_much_is_your_usual_electricity_bill_per/
  • Is my electricity bill high? [Online forum post]. (2021, October 15). Reddit. https://www.reddit.com/r/sydney/comments/q8lsdw/is_my_electricity_bill_high/
  • Just got an $1100 elec bill [Online forum post]. (2023, August 2). Reddit. https://www.reddit.com/r/sydney/comments/15g21et/just_got_an_1100_elec_bill/
  • My monthly power bill for 2 people in a 2-bed apartment is $242 [Online forum post]. (2023, November 7). Reddit. https://www.reddit.com/r/AusFinance/comments/17pnts9/my_monthly_powerbill_for_2_people_in_2bed/
  • Our electricity bill just came in at $905, as a sharehouse of 4—is this actually normal? First-time renter! [Online forum post]. (2026, June 25). Reddit. https://www.reddit.com/r/AusProperty/comments/1uf6w2l/our_electricity_bill_just_came_in_at_905_as_a/
  • Trying to understand utility bills [Online forum post]. (2026, May 2). Reddit. https://www.reddit.com/r/AusFinance/comments/1t25bf3/trying_to_understand_utility_bills/
  • Water heater/electricity bill issues [Online forum thread]. (2013, October 4). Whirlpool Forums. https://forums.whirlpool.net.au/archive/2164447
  • What’s your electricity bill this month and how cooked are you for running AC? [Online forum post]. (2026, January 26). Reddit. https://www.reddit.com/r/AusFinance/comments/1qnw8vh/whats_your_electricity_bill_this_month_and_how/
  • Why is my electricity bill so high for 2 people? [Online forum post]. (2024, August 5). Reddit. https://www.reddit.com/r/AusFinance/comments/1eke4uh/why_is_my_electricity_bill_so_high_for_2_people/
Speaker notes

Understanding the Invisible
The problem
01 / 09
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