THERATA 150L (KZd35-R16SWE/S-ST15)
Rebates up to
$600
STC $600
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.
Register data as at CER (STC) 2026-04-30
Specifications
| Type | Integral all-in-one |
| Refrigerant | R134a |
| Tank volume | 150 L |
| Tank material | Enamel-lined mild steel |
| Hot water delivery | 60 °C |
Certified to
Specs from: ABCB WaterMark product register (model ID KZd35-R16SWE/S-ST15, certificate 032234); Sahara Energy THERATA commercial product page; public CER SRES air source heat pump models register.
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 | 11 STCs | $440 |
| 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)
Not yet registered for ESCs.
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 THERATA KZd35-R16SWE/S-ST15 is an all-in-one integral heat pump water heater built around a 150 L enamel-lined mild steel tank, registered on WaterMark as a “150 litre integral heat pump hot water heater” with G3/4 connections rated to 850 kPa. It runs on R134a refrigerant and delivers hot water at 60 degrees C.
Distributor Sahara Energy lists this same heat pump model (alongside the larger KZd40-R20SWE/S-ST25) as the single-unit building block behind THERATA’s larger VEU Activity 44 commercial systems, where up to four of these heat pumps are ganged onto a shared multi-hundred-litre tank with in-tank electric boost. The entry here covers the standalone single-heat-pump, single-tank configuration that carries its own SRES STC registration.
No standalone capacity, COP, dimension, or weight figures are published for the single-unit configuration, so those fields are omitted rather than estimated. This model has been on the CER SRES Air Source Heat Pump Models register under the THERATA brand since March 2022, eligible to 31 December 2030.
Registered model codes
KZd35-R16SWE/S-ST15
Homeowners
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