Stiebel Eltron 220L (WWK 222 H)
Rebates up to
$1,440
STC $600 · ESC $840 (NSW)
Replace-electric, medium household, best zone. Enter your postcode below for exact figures.
VIC Solar Homes rebate
$1,000
50% of installed price, point-of-sale. Stacks with STC/VEEC above.
VIC only. Assumed eligible, not confirmed against the live Solar Victoria product list.
AS/NZS 4234 energy savings
69%
vs the standard's reference electric storage water heater, medium household, best zone.
Register data as at CER (STC) 2026-04-30
Specifications
| Type | Integral all-in-one |
| Refrigerant | R134a |
| Tank volume | 220 L |
| Rated power input | 0.5 kW |
| COP | 3.94 (Annual Average COP, AS/NZS 4234, climate zone 2, medium load) |
| Sound level | 45 dB(A) |
| Hot water delivery | 61 °C |
| Operating ambient | -5 to 42 °C |
| Tank height | 1501 mm |
| Tank diameter | 690 mm |
| Tank weight (empty) | 120 kg |
| Electric backup | 1.5 kW |
| Warranty | Cylinder/condenser 5, sealed refrigeration system 2, T&P relief valve 1 (domestic use) |
Specs from: Stiebel Eltron WWK 222-302 H Operation and Installation Manual (Australia); 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 | 12 STCs | $480 |
| Zone 2 | 13 STCs | $520 |
| Sydney (Z3) | 14 STCs | $560 |
| Melbourne (Z4) | 15 STCs | $600 |
| Canberra (Z5) | 15 STCs | $600 |
VEU — VEECs (Victoria)
Not yet registered for VEECs.
ESS — ESCs (NSW)
| Zone | Repl. electric metro / regional | Repl. gas metro / regional | Energy savings |
|---|---|---|---|
| Sydney (Z3) | 25 / 26 | 11 / 11 | 69.1% |
| Canberra (Z5) | 27 / 28 | 12 / 11 | 67.6% |
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 Stiebel Eltron WWK 222 H is an all-in-one integral heat pump water heater: the R134a heat pump sits in the upper section of the cabinet directly above a 220 L DHW cylinder, with no separate outdoor unit or field refrigerant piping. Average power consumption of the heat pump at the A15/W10-55 test condition is 0.5 kW, and the heat pump operates down to -5 degrees C ambient, up to +42 degrees C. Annual Average Coefficient of Performance under AS/NZS 4234 (climate zone 2, medium load) is 3.94.
A 1.5 kW electric emergency/booster heater backs up the heat pump outside the application limits and can be run manually for rapid heat-up, lifting the cylinder to a maximum of 65 degrees C. The heat pump alone reaches a default set temperature of 61 degrees C. The unit stands 1501 mm tall, 690 mm in diameter, and weighs 120 kg empty, with an average sound pressure level of 45 dB(A) at 1 m (sound power level 60 dB(A)).
The WWK 222 (without suffix) shares the same 220 L cabinet but has no electric backup heater; the added heater load on the WWK 222 H carries a higher fuse protection rating (C16 vs C10). The two variants are registered and warranted separately.
Registered model codes
WWK222H, WWK 222 H
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