Hot water is a third of an average bill.
For most Australian households, heating water is the single biggest energy line item after heating/cooling the space itself. Switching from gas or resistance electric to a heat pump cuts that line by 65–80%. Pair with solar and you're effectively self-funded for the life of the unit.
Specs your consultant will actually nail down.
- Tank size
- 250 L for 2–3 people · 315 L for 4–5 · 400 L+ for larger households
- Refrigerant
- CO₂ (R744) for cold climates · R290 propane for efficiency · R134a is older
- COP (Coefficient of Performance)
- 4.0+ at 15 °C ambient — anything below 3.5 is mediocre
- Noise rating
- < 50 dB(A) at 1 m — important for neighbours and bedrooms
- Brands we install
- Sanden (premium CO₂), Reclaim Energy, iStore, Aquatech, Stiebel Eltron
- Warranty
- Tank 7–10 yr · compressor 5–6 yr · workmanship 2 yr minimum
- STC rebate
- 20–32 STCs depending on size and state — typically $700–$1,400 off install
- State rebates
- VIC (VEU): up to $1,000 · NSW (PDRS): up to $700 · QLD & SA: program-dependent