A heat pump hot water system is efficient and quiet. Like any equipment that moves air, where you install it makes a difference. It affects how well it runs and how satisfied your household is with it. Getting the location right keeps it performing efficiently. It drains properly and stays out of earshot of bedrooms. This guide explains what a heat pump needs from its location. It covers the noise question. It shows the best and worst places to put one in a Perth home.
The short version is that a heat pump wants an open, well-ventilated outdoor spot. It needs room around it to breathe. It needs a path for its drainage. It needs a sensible distance from where people sleep. A good installer settles all of this as part of the design.
What a Heat Pump Needs From Its Location
A heat pump draws heat out of the surrounding air. The single most important thing it needs is a good supply of air. The three practical requirements follow from that.
- Airflow and clearance. A heat pump pulls in air and blows out cooler air. It needs clear space around the unit and in front of the fan. Tucking it into a tight, enclosed nook starves it of air. It makes the unit work harder. Open clearances matter.
- Drainage. A heat pump takes heat from the air. It produces some condensate, like an air conditioner. It needs a spot where that water can drain away cleanly rather than pooling.
- Weather and access. The unit is built for outdoors. A position out of the very harshest afternoon sun keeps it well. Room for a technician to service it keeps it running well for the long term.
An installer follows the manufacturer’s specified clearances for the particular model. This is why placement is planned rather than improvised on the day.
The Noise Question
The most common concern people raise is noise. A heat pump has a fan and a compressor. It does make some sound when it is running. It sounds similar in character to an outdoor air conditioner unit. Modern units such as the iStore are relatively quiet. The key is that it does not run all the time. It runs to heat the tank, often timed to the middle of the day when solar is available. Household activity masks it then. It rests once the water is hot.
The practical answer is placement. Positioning the unit away from bedroom windows helps. Keeping it away from a neighbour’s bedroom windows too means the occasional running noise is a non-issue. This is one of the main reasons the location is chosen carefully. It is not simply put wherever the old system was.
The Best and Worst Places for a Heat Pump
The table below sets out where a heat pump is happy and where it is not.
| Good locations | Poor locations |
|---|---|
| An open outdoor wall with clear space around the unit | A tight, enclosed alcove with little airflow |
| Near the existing tank and plumbing, to keep pipe runs short | Directly outside a bedroom window, where noise carries |
| A spot with easy drainage for the condensate | A low corner where condensate cannot drain away |
| Accessible for future servicing | Boxed in or hard to reach for maintenance |
Keeping the unit near where the hot water is used helps. Keeping it near the existing plumbing reduces heat lost in long pipe runs. The ideal spot balances airflow, noise, drainage and plumbing all at once.
Integrated or Split Systems
Heat pump hot water systems come in two broad forms. An integrated unit has the heat pump and the tank in one piece. It is simple to install where there is room for the whole unit. A split system separates the compressor from the tank. It can help where space or noise near the tank location is tight. Which suits a home depends on the available space and layout. It is one of the things a proper site assessment weighs up.
How Positive Energy Solutions Can Help
Positive Energy Solutions assesses the best location for a heat pump as part of every hot water design. We balance airflow, drainage, plumbing and noise. The system runs efficiently and quietly. As an iStore Elite Partner, the team installs iStore heat pumps to the manufacturer’s clearances. We install to the current standards. Every installation is completed by our accredited installers and signed off to Positive Energy’s completion standards. It is backed by a 10-year installation workmanship warranty. Positive Energy Protection, powered by Omnidian, supports all systems. Coverage continues well after it is switched on.
Frequently Asked Questions
Where is the best place to install a heat pump hot water system?
An open outdoor location with clear space around the unit helps airflow. A path for the condensate to drain is needed. Keep a sensible distance from bedroom windows to keep noise out of the way. Positioning it near the existing tank and plumbing keeps pipe runs short. An installer follows the manufacturer’s clearances for the model.
Are heat pump hot water systems noisy?
They make some sound when running. It is similar to an outdoor air conditioner. Modern units such as the iStore are relatively quiet. They do not run constantly. They only run to heat the tank. Sensible placement away from bedroom windows means occasional running noise is not an issue.
Can a heat pump be installed indoors or in a garage?
A heat pump needs a good supply of air to work. An enclosed indoor space is usually unsuitable unless it is well ventilated. A split system may be used where space is tight. The best location is generally an open, well-ventilated outdoor spot. An installer confirms this during the site assessment.
Does a heat pump need a drain?
Yes. A heat pump produces some condensate as it takes heat from the air, like an air conditioner. It needs a location where that water can drain away cleanly rather than pooling. This is one of the factors that determines the best spot for the unit.
Get Your Heat Pump in the Right Spot
A well-placed heat pump runs efficiently and quietly for years. Choosing the right location for a specific Perth home is exactly what a Positive Energy Solutions site assessment is for.
Talk to the local team about a heat pump for your Perth home: positiveenergy.com.au/contact/
About the Author
Jason Wiktorowicz
Sales Manager, Positive Energy Solutions | Perth, WA
Jason has been at the centre of Western Australia’s energy transition for over a decade. As Orchestration Lead on Project Symphony, he led WA’s largest virtual power plant pilot. As Stream Lead on Project Encore, he worked directly with AEMO, Western Power and Energy Policy WA. He shaped how distributed energy resources connect and operate on the SWIS. That work included developing and rolling out CSIP-AUS. This is now mandatory for all new WA grid connections. He also led Emergency Solar Management. It was the first program of its kind in WA. VPP for Schools provided direct market benefits through Supplementary Reserve Capacity. REBAR is the WA Residential Battery Rebate scheme.
At Positive Energy Solutions, Jason leads sales with a focus on system design accuracy. He focuses on long-term performance. Positive Energy Solutions installs solar and battery systems. We install EV chargers and heat pumps. We hold partner accreditations with Fronius, SigEnergy, iStore and SunPower.
10-year installation workmanship warranty. Positive Energy Protection, powered by Omnidian, performance monitoring included on all systems.
