Heat Pump Hot Water Cost Calculator & Price Guide
Use this guide to estimate heat pump hot water system cost and heat pump hot water installation cost for Australian homes. Typical supply-and-install pricing starts at $3,200 AUD for a 160 L unit and goes up to $4,200 AUD for a 315 L unit, with the final heat pump hot water system price depending on size, access and any electrical or site add-ons.
Estimate heat pump hot water cost
Fully installed midpoints including STC rebate where applicable. Gas or electric swap-out; complex relocations cost more.
Optional — set to 0 to exclude.
- 270 L heat pump × 1 (Like-for-like swap):
- $3,800
Estimates are indicative only. For an accurate price, get free quotes from local tradies above.
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Heat Pump Hot Water Price Breakdown
Typical job based on 1 system (Like-for-like swap). Prices are supply-and-install midpoints — actual quotes will vary.
| Type | Cost per system (Like-for-like swap) | Typical 1 system (Like-for-like swap) job |
|---|---|---|
| 160 L heat pump | $3,200 | $3,200 |
| 270 L heat pump | $3,800 | $3,800 |
| 315 L heat pump | $4,200 | $4,200 |
What Affects Heat Pump Hot Water Cost?
- System size: The main driver of heat pump hot water system cost is the tank size you choose. A like-for-like swap is $3,200 AUD for 160 L, $3,800 AUD for 270 L, and $4,200 AUD for 315 L per system.
- Installation complexity: A standard like-for-like swap uses the base rate, while more difficult installs increase the hot water system installation cost. Relocating the unit or running longer pipework uses a ×1.25 multiplier, and complex access or switchboard work uses a ×1.4 multiplier.
- Electrical upgrades: If the existing electrical setup is not suitable, a switchboard upgrade allowance can be added to the job. This adds a flat $1,200 AUD per job and is not multiplied by the number of systems.
- Base and site preparation: Some installations need a new concrete pad before the heat pump can be fitted. This adds a flat $450 AUD per job, which can increase the total heat pump hot water system installation cost even on a straightforward replacement.
Heat Pump Hot Water Cost - Frequently Asked Questions
For a typical 1-system job, the base supply-and-install cost is $3,200 AUD for a 160 L heat pump, $3,800 AUD for a 270 L heat pump, and $4,200 AUD for a 315 L heat pump. These figures apply to a like-for-like swap. More complex installations can cost more if multipliers or add-ons apply.
A like-for-like swap uses the base rate with no complexity multiplier. The installed price is $3,200 AUD for 160 L, $3,800 AUD for 270 L, and $4,200 AUD for 315 L per system. The calculator then shows an estimate range at ±15% around that midpoint.
The biggest changes usually come from relocation, long pipe runs, or difficult access. A relocate or long pipe run uses a ×1.25 multiplier, while complex access or switchboard work uses a ×1.4 multiplier on the per-system base rate. Flat add-ons may also apply, including $1,200 AUD for a switchboard upgrade allowance and $450 AUD for a new concrete pad.
The most common size for a 3–4 person home is a 270 L heat pump. For a like-for-like swap, the heat pump hot water system price is $3,800 AUD per system. If the unit needs to be relocated or the installation is more complex, the total will increase based on the set multipliers.
If the system is relocated or needs a long pipe run, the base rate is multiplied by ×1.25. That means a 160 L system becomes $4,000 AUD, a 270 L system becomes $4,750 AUD, and a 315 L system becomes $5,250 AUD before any flat add-ons. A switchboard upgrade allowance of $1,200 AUD or a new concrete pad at $450 AUD may be added if required.
Yes. If the calculator maths come in below the minimum job charge, the displayed minimum is $3,000 AUD. In practice, the listed base prices for like-for-like heat pump installs already start from $3,200 AUD per system.
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