Daikin vs Quantum: Which Heat Pump Is Better? (2026)
Quick Verdict
Quantum is the more efficient choice with a higher COP rating, meaning lower running costs over time, while Daikin offers better protection with a 10-year tank warranty.
Side-by-Side Comparison
| Feature | Daikin | Quantum |
|---|---|---|
| Price range (installed) | $5,500 - $8,500 | $3,250 - $4,450Lower |
| COP (efficiency) | 4.5 | 4.53Higher |
| Tank warranty | 10 yearsLonger | 5 years |
| Compressor warranty | 10 yearsLonger | 2 years |
| Noise level | 40dBQuieter | 48dB |
| Annual running cost | ~$263/yr | ~$261/yrLower |
| Refrigerant type | R134a | R134a |
| Country of manufacture | Japan | Australia |
| Australian made | No | No |
| Best for | Homeowners wanting the absolute best performance and warranty, especially in cold climates | Small households needing a 150L or 200L tank, and anyone outside Victoria who wants a long-established Australian brand |
Price Comparison
Daikin starts from $5,500 installed (before rebates), while Quantum starts from $3,250. That is a difference of roughly $2,250 at the entry level. Quantum is the more budget-friendly option upfront, though Daikin may deliver savings through lower running costs over time. Both prices are for fully installed systems before government rebates and STCs, which can reduce the out-of-pocket cost by $1,000 to $3,000 depending on your state.
Efficiency Comparison
COP (Coefficient of Performance) is the key efficiency metric for heat pumps. A higher COP means more heat output per unit of electricity consumed. Daikin achieves a COP of 4.5, while Quantum reaches 4.53. The Quantum is 1% more efficient, which translates to roughly $2 less per year in running costs. Over a 10-year lifespan, that efficiency advantage adds up to approximately $20 in savings.
Warranty Comparison
Daikin offers a 10-year tank warranty and 10-year compressor warranty. Quantum offers a 5-year tank warranty and 2-year compressor warranty. The Daikin has the stronger warranty coverage with 10 years on the tank, giving you 5 extra years of protection compared to the Quantum. A longer tank warranty can provide significant peace of mind, as the tank is the most expensive component to replace.
Noise Comparison
Noise is an important consideration, especially for suburban installations where the unit may be close to bedrooms or neighbouring properties. Daikin publishes 40dB for its quietest model, and Quantum publishes 48dB. The Daikin is quieter at 40dB. At under 40dB, this is comparable to a quiet library and unlikely to cause any disturbance.
Climate Suitability
The type of refrigerant a heat pump uses significantly affects its performance in cold weather. Daikin uses R134a refrigerant, while Quantum uses R134a. Both units use the same refrigerant type, so cold-weather performance should be comparable. R134a performs well in moderate climates but may lose some efficiency in very cold conditions.
Pros and Cons
Daikin
Pros
- Best-in-market 10yr parts AND labour warranty
- CO2 refrigerant (heats to 90C, no boost needed)
- Quietest outdoor unit in market (40dB)
- Works down to -26C
- Highest STC allocation due to CO2 efficiency
Cons
- Most expensive option in market
- Split system requires more complex installation
- Newer to the Australian hot water market
- Not Australian-made
Quantum
Pros
- Four tank sizes from 150L to 340L, the widest range here
- A 150L option, which almost no other brand offers
- Australian company with a manufacturing facility at Seaford, South Australia
- Propane (R290) across the range
- On the register since 2014, so the models have a long track record
Cons
- Not on the Solar Victoria product list at all, so a Quantum does not qualify for the Victorian hot water rebate
- Only 2 years on the electrical and refrigeration parts, the shortest here
- Quantum publishes no labour warranty term
- The product pages and the 270L data sheet disagree on the minimum operating temperature (-10C against -15C)
- 50 dB on the 150L and 200L
Which Should You Choose?
Choose Daikin if...
- You want a longer tank warranty (10 years vs 5 years)
- Quiet operation matters to you (40dB vs 48dB)
Choose Quantum if...
- You want a lower upfront cost (from $3,250 vs $5,500)
- You want the best efficiency and lowest running costs (COP 4.53 vs 4.5)
- You want lower annual running costs (~$261/yr vs ~$263/yr)
Buying in Victoria? Stack up to $2,700 in rebates
Whichever brand you pick, Victorian households can stack the Solar Victoria Hot Water Rebate ($1,000-$1,400), the Victorian Energy Upgrades discount ($500-$2,000), and federal STCs ($500-$1,200) ahead of the 1 March 2027 gas ban deadline.
Heat pump guides
- Every Australian heat pump rebate, with the dated changes
- The best heat pump hot water brands in Australia
- Heat pump hot water cost in Australia
- Victoria heat pump rebates
- New South Wales heat pump rebates
- Queensland heat pump rebates
- South Australia heat pump rebates
- Australian Capital Territory heat pump rebates
- Western Australia heat pump rebates
- Tasmania heat pump rebates
- Northern Territory heat pump rebates
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