Best Heat Pump Hot Water Brands in Australia (2026 Review)

Our brand reviews are based on five key criteria that matter most to Australian homeowners:

• Efficiency (COP): How much heat the system produces per unit of electricity. Higher COP means lower running costs.
• Noise levels: Measured in decibels (dB). Critical for systems installed near bedrooms or boundary fences.
• Warranty: Tank warranty (5-15 years) and compressor warranty (5-7 years) indicate manufacturer confidence in their product.
• Cold-weather performance: How well the system maintains efficiency when ambient temperature drops below 10C.
• Value for money: Balancing upfront cost against long-term running costs, quality, and warranty coverage.

We do not accept payment from any manufacturer. Our reviews are based on published specifications, installer feedback, owner reports, and independent testing data where available.

Best for: Cold climates, Australian-made, maximum efficiency

Reclaim Energy is an Australian manufacturer based in Melbourne. Their CO2 heat pump is designed specifically for Australian conditions, with particular attention to cold-climate performance.

Key specifications:

• Type: Split system (separate outdoor unit and indoor/outdoor tank)
• Refrigerant: CO2 (R744) - natural, GWP of 1
• COP: 4.5 at 20C ambient (one of the highest available)
• Cold weather: Operates efficiently down to -10C, maintaining COP above 2.5
• Noise: 38 dB at 1 metre (very quiet, comparable to a library)
• Tank sizes: 270L, 315L stainless steel
• Warranty: 15-year tank, 6-year compressor
• Price range: $4,200-$5,800 installed (before rebates)

Pros: Australian designed and supported, excellent cold-weather performance, very quiet split system, 15-year tank warranty, stainless steel tank resists corrosion. Strong technical support network for installers.

Cons: Premium pricing (higher upfront cost than budget brands), smaller installer network than Rheem (though growing rapidly), fewer tank size options than some competitors.

Best suited for: Victorian and Canberra homeowners in cooler suburbs, households that prioritise quality and warranty, anyone who wants an Australian-made product with local support.

Best for: Quietest operation, premium Japanese quality

Sanden is a Japanese manufacturer with decades of heat pump experience. Their Eco Plus system is widely regarded as one of the best heat pump hot water systems in the world.

Key specifications:

• Type: Split system
• Refrigerant: CO2 (R744)
• COP: 5.1 at rated conditions (the highest COP available in Australia)
• Cold weather: Rated to -10C, excellent performance in cold climates
• Noise: 37 dB at 1 metre (the quietest heat pump hot water system available)
• Tank sizes: 160L, 250L, 315L stainless steel
• Warranty: 15-year tank, 6-year compressor
• Price range: $4,500-$6,500 installed (before rebates)

Pros: Highest COP on the market (5.1), quietest operation (37 dB), proven Japanese engineering with global track record, stainless steel tank, excellent cold-weather performance, 15-year tank warranty.

Cons: The most expensive option upfront, fewer Australian installers certified for Sanden-specific work, parts can take longer to source if needed. The 160L model is too small for most households.

Best suited for: Households where noise is the primary concern (near neighbours, bedroom proximity), buyers who want the highest possible efficiency and are willing to pay the premium, cold-climate installations.

Best for: Availability, trusted brand, wide installer network

Rheem is Australia's most recognised hot water brand with the largest distributor and installer network in the country. Their heat pump range has improved significantly in recent years.

Key specifications:

• Type: Integrated (all-in-one)
• Refrigerant: R290 (propane) in newer models
• COP: 3.5-3.8 at rated conditions
• Cold weather: Rated to -7C
• Noise: 48-50 dB (moderate, typical for integrated systems)
• Tank sizes: 270L, 325L vitreous enamel
• Warranty: 10-year tank, 5-year compressor
• Price range: $3,200-$4,800 installed (before rebates)

Pros: Available from virtually every plumber and hot water specialist in Australia, strong parts availability, competitive pricing, well-understood by installers (fewer installation errors), Rheem's extensive after-sales service network. R290 refrigerant in newer models is environmentally friendly.

Cons: Integrated design is louder than split systems, vitreous enamel tank (less durable than stainless steel in aggressive water conditions), COP is mid-range, 10-year tank warranty is shorter than premium brands. Not ideal for very cold climates.

Best suited for: Homeowners who want a simple, reliable system from a trusted brand, straightforward replacements where installer availability matters, mild to moderate climates.

Best for: Budget-conscious buyers, best value

iStore is an Australian brand offering competitively priced integrated heat pump systems. They have grown rapidly by offering solid performance at a lower price point than premium competitors.

Key specifications:

• Type: Integrated (all-in-one)
• Refrigerant: R290 (propane)
• COP: 3.0-3.5 at rated conditions
• Cold weather: Rated to -5C
• Noise: 48 dB
• Tank sizes: 180L, 270L
• Warranty: 5-year tank, 5-year compressor (with extended warranty options)
• Price range: $2,800-$4,000 installed (before rebates)

Pros: Most affordable heat pump option, good basic performance, growing installer network, R290 natural refrigerant, compact design suitable for smaller spaces. Often the cheapest installed price after rebates.

Cons: Shorter warranty than premium brands (5-year tank vs 10-15 years), lower COP means slightly higher running costs, not recommended for cold climates (rated to -5C only), smaller tank range (no 315L+ option). Build quality is adequate but not on par with Sanden or Reclaim.

Best suited for: Budget-conscious homeowners, rental properties, mild climates (coastal QLD, northern NSW, Perth), smaller households (1-3 people) where the 270L tank is sufficient.

Best for: German engineering, build quality, long-term reliability

Stiebel Eltron is a German manufacturer with over 100 years of experience in heating technology. Their heat pump hot water systems are engineered for durability and long-term performance.

Key specifications:

• Type: Integrated and split options available
• Refrigerant: R134a (older models), R290 (newer models)
• COP: 3.5-4.0 at rated conditions
• Cold weather: Rated to -7C (split models to -10C)
• Noise: 45-50 dB (integrated), 40-45 dB (split)
• Tank sizes: 220L, 302L integrated; various split options
• Warranty: 10-year tank, 5-year compressor
• Price range: $3,800-$5,500 installed (before rebates)

Pros: German engineering with excellent build quality, good efficiency ratings, well-established in the Australian market with strong distributor network, decent cold-weather capability, smart controller with WiFi connectivity on newer models.

Cons: Mid-to-premium pricing, some older models still use R134a (being phased out), integrated models are louder than split competitors, parts sourced from Germany can have longer lead times. Not quite as efficient as CO2 models in cold weather.

Best suited for: Homeowners who value build quality and long-term reliability, those who want a European-engineered product, households in temperate climates (zone 4-6) looking for a premium alternative to Rheem.

Prices are supply and installation before rebates. COP at 20C ambient, heating from 15C to 55C. Noise at 1 metre distance.

Based on our analysis, here are our picks by scenario:

• Best overall: Reclaim Energy - Best balance of efficiency, cold-weather performance, warranty, and Australian support. The CO2 refrigerant system handles everything from Darwin to Ballarat.
• Best for noise-sensitive locations: Sanden - At 37 dB, it is practically inaudible from a few metres away. Essential if the unit is near a bedroom window or a neighbour's fence.
• Best availability/easiest replacement: Rheem - Every plumber in Australia knows Rheem. If you want a fast, straightforward installation with guaranteed parts availability, Rheem is the safe choice.
• Best value for money: iStore - The lowest upfront cost with acceptable performance. Ideal for investment properties, rentals, or budget-limited installations.
• Best build quality: Stiebel Eltron - German engineering means precision manufacturing and long-term durability. A solid mid-premium choice for homeowners who value quality.
• Best for cold climates: Reclaim Energy or Sanden - Both use CO2 refrigerant, which maintains high efficiency at low ambient temperatures. Essential for Canberra, Ballarat, Blue Mountains, and Tasmania.