Hot Water
& Heat pumps
Energy-efficient hot water collectors from iStore, Apricus, Reclaim, Stiebel Eltron, Dux, and Rinnai. Use free ambient-air heat to warm water with a minimal carbon footprint — cutting bills by up to 80%.
Back to homeiStore
An Australian-engineered hot water system designed to replace traditional electric or gas hot water storage units. It extracts heat energy from the ambient air to heat water, drastically reducing household power consumption.
iStore 180L
iStore 270L
Delivers up to 4.82 kW of heating output for every 1 kW of electrical energy consumed under optimal conditions — a Coefficient of Performance up to 482%.
Cuts hot water heating costs significantly compared to conventional electric element systems, saving up to $1,000/year depending on usage and tariffs.
Functions as a 'thermal battery'. Built-in timers let you set the heating cycle during peak solar production hours, running the heat pump entirely on surplus solar power.
Built-in timer controls, vacation mode, and Wi-Fi connectivity for monitoring and adjusting temperatures via the iStore app.
Both the 180L and 270L qualify for Federal STCs (Small-scale Technology Certificates) and state-based hot water rebates (such as Solar Victoria), reducing upfront installation costs.
Standard 5-year comprehensive parts and labour warranty.
Apricus
The All-In-One Heat Pump (model APHP-R290-260) is an energy-efficient hot water system designed specifically for Australian conditions. It replaces traditional gas or electric hot water cylinders by drawing heat energy from the surrounding air to heat household water.
APHP-R290-260
Drastically reduces electricity bills compared to standard electric resistance water heaters, cutting carbon emissions by up to 3 tonnes annually.
Uses the heat pump as the primary source (up to 60°C) with a built-in 1.8 kW electric heating element for high-demand scenarios or extra boosting up to 70°C.
Built-in programmable timer blocks on the touch controller let you run the heating cycle during midday peak solar production hours.
A wrap-around micro-channel condenser coil keeps the refrigerant isolated from contact with the potable water tank to prevent contamination and internal corrosion.
Smart touchscreen display and Wi-Fi mobile app (Hot Water Hub) to view real-time power consumption, monitor water temperatures, and set operational modes remotely.
Eligible for STC certificates as well as state-specific heat pump rebates (Solar Victoria, VEEC, and ESC).
Reclaim Energy
Widely regarded as a premium, top-tier hot water solution in Australia. Unlike standard all-in-one units, Reclaim's flagship system is a split system pairing an ultra-efficient outdoor heat pump compressor with a separate hot water storage tank. Best known for using natural CO₂ (R744) refrigerant, performing exceptionally in cold climates without an electric booster.
CO₂ Split System
Generates over 5 kW of heating output for every 1 kW of power consumed — one of the most efficient systems available.
Where standard refrigerants struggle in sub-zero weather, CO₂ thrives in extreme cold — reliably heating water to 63°C even at -10°C ambient.
Operating at just 37 decibels, it is one of the quietest heat pumps on the market — allowing flexible placement near bedroom windows or boundaries.
Because the heat pump unit is separate from the tank, choose between glass-lined or high-grade stainless steel tanks in various sizes to match household demand.
Six preset operational modes (including Off-Peak, Daytime PV mode, and One-Shot Boost) with optional Wi-Fi app monitoring for tracking energy usage.
Fully approved for Australian Federal STC certificates and state rebates (VEEC, Solar Victoria, ESC).
Stiebel Eltron
The WWK Series (WWK 222 and WWK 302) is a popular German-engineered, all-in-one hot water heat pump range in Australia. Known for robust build quality and reliability, it is designed for outdoor and indoor installations (with adequate ventilation) and features active defrosting for cold climates.
WWK 222 / 222 H
WWK 302 / 302 H
Consumes under 700 W of electrical power in standard heat pump operation, delivering significant energy savings over conventional electric resistance water heaters.
Uses a current impressed (electronically powered) anode rather than a sacrificial magnesium anode, eliminating the need for periodic anode replacements in hard or soft water areas.
An active hot-gas defrost system prevents icing on the evaporator coil, allowing efficient operation down to -5°C without freezing up.
An encased wrap-around condenser design ensures optimal heat transfer without placing internal coils inside the potable water tank.
Connects with rooftop solar systems or smart home energy management switches to run during daytime peak solar production windows.
Qualified for Australian Federal STC certificates and state rebates (VEEC, Solar Victoria, ESC). Supported by a 5-year tank warranty and 2-year parts/labour warranty. 'H' models include an integrated 1.7 kW smart electric booster.
Dux
Dux Hot Water — one of Australia's longest-established water heating manufacturers — offers the Dux Ecosmart Heat Pump range (replacing the older-generation Dux Airoheat). Designed and built in Australia, these all-in-one systems are engineered specifically for Australian conditions and ease of replacement for existing outdoor electric storage tanks.
Dux Ecosmart 200L
Dux Ecosmart 285L
Cuts hot water heating energy consumption by up to 71.6% compared to a conventional electric storage system.
A patented dual-wall wrap-around heating coil directly transfers heat into the water while keeping refrigerant safely isolated from potable water.
Connects via the Dux HP / Smart Life mobile app to manage modes (Auto, ECO, Holiday, Boost) and program timers to run during peak daytime solar generation.
Designed with the same footprint and dual-side water connections as standard outdoor electric tanks, allowing fast swapping by standard hot water trades.
Commercial-grade enamel lining, dual anodes for corrosion resistance, anti-corrosive component coatings, and a rust-proof polymer base.
7 years on tank, 3 years on refrigeration components, 1 year parts & labour (up to 5-year whole-of-product coverage under state programs like Solar Victoria). Fully eligible for STC certificates and state rebates.
Rinnai
A long-trusted household name in Australian water heating. Rinnai's heat pump range, marketed under the Enviroflo series, offers both monobloc (all-in-one) and split-system options designed to handle tough local climate conditions.
Enviroflo GR Series (All-in-One)
Enviroflo S Series (Split System)
Cuts power consumption significantly compared to a standard electric water heater, lowering carbon emissions and electricity bills.
Select GR Series sizes (180L, 265L, 300L) come with a standard 10 Amp power plug for fast, straight-swap electric replacement without heavy electrical upgrades.
Built-in Wi-Fi via the SmartLife / Rinnai Link mobile app to configure operational timers and prioritise running during peak daytime solar generation.
Includes Standard, ECO, Hybrid, Electric, and Vacation modes to optimise recovery speeds or maximise energy savings based on family needs.
Comes standard with an auxiliary backup heating element to guarantee hot water supply during sudden cold snaps or spikes in household demand.
Rated to handle up to 1000 kPa water pressure. Fully eligible for Australian Federal STC certificates and state rebates (VEEC, Solar Victoria, ESC).
All brands, side by side
| Brand | System Type | Tank Options | COP | Noise | Refrigerant | Tank Warranty | Best Use Case |
|---|---|---|---|---|---|---|---|
| iStore | All-in-One | 180L, 270L | ~4.0 – 4.8 | 46.6 dBA | R290 (Eco) | 5 Years | Best Value All-Rounder: excellent budget performance and solar PV timer features. |
| Apricus | All-in-One | 260L | 4.13 | 43 dBA | R290 (Eco) | 6 Years | Best Mid-Range Balance: quiet operation, smart app controls, and solid efficiency. |
| Reclaim Energy | Split System | 160L to 400L | 5.0 – 6.0+ | 37 dBA (Ultra-Quiet) | CO₂ (R744) | Up to 15 Years | Premium / Cold Climates: maximum efficiency, operates down to -10°C without electric boost. |
| Stiebel Eltron | All-in-One | 200L to 302L | ~3.6 – 3.9 | 45 dBA | R134a / R290 | 5 Years | Durability & Low Power: maintenance-free anode and ultra-low current draw (~2.3A). |
| Dux | All-in-One | 200L, 285L | ~4.1 | ~45 dBA | R290 (Eco) | 7 Years | Easy Retrofit: matches classic outdoor electric tank footprints with Australian backing. |
| Rinnai | All-in-One & Split | 180L to 400L | ~4.0 – 4.2 | ~45 dBA | R290 / R32 | 7–10 Years | Flexible Sizing & 10A Plug: wide choice of tank sizes and plug-and-play installation models. |
Choose the right heat pump
Budget-Friendly
iStore and Dux generally offer lower upfront purchase and installation costs, popular for straightforward electric replacements.
Mid-Tier
Apricus, Rinnai, and Stiebel Eltron sit in the middle bracket with enhanced build materials, smart app capabilities, or lower current draws.
Premium Investment
Reclaim Energy carries the highest upfront cost ($4,500–$6,000+ installed) but yields the highest long-term energy savings and longest service life.
Cold Climates (-5°C to -10°C)
Reclaim Energy (CO₂ refrigerant) leads performance in frost-prone regions without an electric resistance boost. Stiebel Eltron also performs strongly in sub-zero temps due to its active hot-gas defrost system.
Moderate / Warm Climates
iStore, Apricus, Dux, and Rinnai all excel across standard Australian coastal and temperate conditions using eco-friendly R290 refrigerant.
Whisper Quiet
Reclaim Energy (37 dBA) and Apricus (43 dBA) are the quietest units — ideal for placement near bedroom windows or narrow side paths.
Standard Quiet
iStore, Stiebel Eltron, Dux, and Rinnai all operate around 45–46 dBA, comfortable for most outdoor installation positions away from windows.
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