Sanden 300L (GAUS-300FQTS)
Rebates up to
$1,610
STC $680 · VEEC $850 (VIC) · ESC $930 (NSW)
Replace-electric, medium household, best zone. Enter your postcode below for exact figures.
VIC Solar Homes rebate
$1,400
50% of installed price, point-of-sale — locally-made tier. Stacks with STC/VEEC above.
VIC only. Assumed eligible, not confirmed against the live Solar Victoria product list.
AS/NZS 4234 energy savings
84%
vs the standard's reference electric storage water heater, medium household, best zone.
Register data as at CER (STC) 2026-04-30 · VEU 2026-07-01
Specifications
| Type | Standalone split |
| Refrigerant | CO2 (R744) |
| Tank volume | 300 L |
| Tank material | Stainless steel |
| Rated heating capacity | 4.99 kW |
| Rated power input | 0.84 kW |
| COP | 5.96 (32.45 degrees C ambient, 18.74 degrees C inlet water (AS/NZS 5125.1)) |
| Sound level | 37 dB(A) |
| Hot water delivery | 63 °C |
| Operating ambient | -10 to 43 °C |
| Tank height | 1891 mm |
| Tank diameter | 580 mm |
| Heat pump weight | 48 kg |
| Tank weight (empty) | 50 kg |
| Warranty | Tank 10 years full replacement plus 5 years prorata (15 total). Heat pump 6 years (FQTS) or 10 years (FQTD). |
Certified to
Specs from: Sanden Hot Water Australia official specifications page (sanden-hot-water.com.au/specifications); Sanden ECO GAUS-160FQTS owner's manual (ManualsLib, covers the shared GAUS range); public STC / VEU / ESS registers.
Certificate rebate by postcode
Registered certificate values
Every scheme this model is registered for, by zone. STCs at $40, VEECs at $85, ESCs at $30 (reference prices as at 2026-07-07). Claim year 2026, medium household.
SRES — STCs (national)
| Zone 1 | 13 STCs | $520 |
| Zone 2 | 13 STCs | $520 |
| Sydney (Z3) | 15 STCs | $600 |
| Melbourne (Z4) | 17 STCs | $680 |
| Canberra (Z5) | 16 STCs | $640 |
VEU — VEECs (Victoria)
| Zone | Repl. electric metro / regional | Repl. gas | Energy savings |
|---|---|---|---|
| Melbourne (Z4) | 10 / 10 | 9 | 83.9% |
| Canberra (Z5) | 10 / 10 | 9 | 83.7% |
ESS — ESCs (NSW)
| Zone | Repl. electric metro / regional | Repl. gas metro / regional | Energy savings |
|---|---|---|---|
| Sydney (Z3) | 28 / 29 | 14 / 13 | 76.2% |
| Canberra (Z5) | 30 / 31 | 14 / 14 | 74.6% |
Certificate counts are computed from the model's registered performance data using the current regulated equations. A lodged claim depends on the specific installation, household size, and the scheme rules in force at creation. Energy savings % is against the AS/NZS 4234:2021 reference electric storage water heater for that zone, medium household, calculated from the model's registered performance data.
The Sanden GAUS-300 is a split-system heat pump water heater: the GAU-A45HPD heat pump unit, shared across the whole GAUS range, paired with a 300 L stainless-steel storage tank. The heat pump uses CO2 (R744) refrigerant with a scroll compressor and inverter control, rated at 4.99 kW heating output for 0.84 kW power input (COP 5.96) at 32.45 degrees C ambient and 18.74 degrees C inlet water, and operates down to -10 degrees C ambient.
The system delivers hot water at 63 degrees C, runs at 37 dBA, and the stainless tank carries a 10-year full-replacement warranty plus 5 years prorata (15 years total); the heat pump unit carries 6 years on the older FQTS model or 10 years on the newer WiFi-enabled FQTD model.
The same physical product is registered under FQS, FQTS and FQTD model codes (tank fitting and control revisions). Older EQT-series 300 L model codes on the STC register predate this heat pump generation and are not covered by this entry pending separate spec confirmation.
Registered model codes
GAUS-300FQS, GAUS-300FQTD, GAUS-300FQTS
Homeowners
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