iStore vs Midea: Which Heat Pump Is Better? (2026)
Quick Verdict
Midea is the more efficient choice with a higher COP rating, meaning lower running costs over time.
Side-by-Side Comparison
| Feature | iStore | Midea |
|---|---|---|
| Price range (installed) | $2,800 - $4,200 | $2,500 - $3,800Lower |
| COP (efficiency) | 3.2 | 3.4Higher |
| Tank warranty | 5 years | 5 years |
| Compressor warranty | 5 years | 5 years |
| Noise level | 49dBQuieter | 50dB |
| Annual running cost | ~$340/yr | ~$340/yr |
| Refrigerant type | R134a | R134a |
| Country of manufacture | Australia | China |
| Australian made | Yes | No |
| Best for | Budget-conscious households wanting maximum rebate impact and simple installation | Budget buyers, rental properties, or anyone wanting the lowest possible upfront cost |
Price Comparison
iStore starts from $2,800 installed (before rebates), while Midea starts from $2,500. That is a difference of roughly $300 at the entry level. Midea is the more budget-friendly option upfront, though iStore 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. iStore achieves a COP of 3.2, while Midea reaches 3.4. The Midea is 6% more efficient, which translates to roughly $0 less per year in running costs. Over a 10-year lifespan, that efficiency advantage adds up to approximately $0 in savings.
Warranty Comparison
iStore offers a 5-year tank warranty and 5-year compressor warranty. Midea offers a 5-year tank warranty and 5-year compressor warranty. Both brands offer the same tank warranty length, so warranty coverage is comparable.
Noise Comparison
Noise is an important consideration, especially for suburban installations where the unit may be close to bedrooms or neighbouring properties. iStore operates at 49dB, while Midea runs at 50dB. The iStore is quieter at 49dB. At this level, you may want to consider placement carefully to avoid disturbing bedrooms or neighbours.
Climate Suitability
The type of refrigerant a heat pump uses significantly affects its performance in cold weather. iStore uses R134a refrigerant, while Midea 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
iStore
Pros
- Most affordable option
- Australian company
- Simple installation
- Good rebate value (low cost means rebates cover more)
- Widely available
Cons
- Lower COP than premium brands
- Shorter warranty
- Noisier than split systems
- Higher running costs long-term
Midea
Pros
- Lowest upfront cost in market
- Good value for money
- Multiple size options
- World's largest appliance manufacturer
- OEM supplier for other AU brands
Cons
- Noisier than premium brands (50-52dB)
- Lower COP than competitors
- Brand perception less premium
- Shorter track record in AU market
- Not Australian-made
Which Should You Choose?
Choose iStore if...
- Quiet operation matters to you (49dB vs 50dB)
- You want Australian-made (eligible for higher VIC rebate tier of $1,400 vs $1,000)
Choose Midea if...
- You want a lower upfront cost (from $2,500 vs $2,800)
- You want the best efficiency and lowest running costs (COP 3.4 vs 3.2)