Energy Efficient / Green Systems in Perth metropolitan
Perth's long, hot summers and mild winters mean cooling and heating can dominate a household power bill. Energy efficient air conditioning covers a mix of equipment and installation choices aimed at cutting that draw: high-star-rated reverse cycle split and ducted systems, inverter compressors that modulate output rather than switching fully on and off, zoning that stops you cooling empty rooms, correctly sized units (rather than oversized ones that short-cycle and waste power), and smart or programmable controls that adapt to actual occupancy. Some contractors in this category also work on solar-matched systems, where the AC load is timed to run off rooftop solar generation, and on refrigerant choices with lower environmental impact.
We've assessed 203 businesses across the Perth metro area that offer this kind of work. When you're comparing them, look past the sales pitch on "eco" branding and check for a few concrete things: whether they do a proper room-by-room heat load calculation before quoting a system size, whether they're transparent about the AC energy rating labels and expected running costs, what workmanship warranty they back the install with, and whether they handle ductwork sealing and insulation as part of the job rather than just bolting on a new unit to old, leaky ducting.
Our scoring weighs verified customer feedback, licensing, responsiveness, and the consistency of work across jobs, giving you a shortcut past guesswork. For the full ranked list of contractors in this category, see the best air conditioning contractors in Perth guide, and for how we build these rankings, read our methodology.
Get matched with energy efficient / green systems
No obligation. Tell us what you need and we'll connect you with suitable contractors in your area.
All energy efficient / green systems, ranked by score and relevance
We found 203 businesses offering energy efficient / green systems; 197 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is energy efficient / green systems, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit an enquiry through this site, it may be shared with partner providers who offer the service. We may receive a referral fee, but our rankings and scores are based only on our published method and are not influenced by fees.
Common questions about energy efficient / green systems
- How much does an energy efficient air conditioning upgrade cost in Perth?
- A single high-efficiency reverse cycle split system typically runs from around $2,500 to $5,000 installed depending on capacity and brand, while a ducted system with zoning across a standard Perth home can range from about $8,000 to $18,000 or more. Costs climb further if old ductwork needs replacing or sealing, which is often where a lot of the efficiency gains actually come from.
- How often should a system be serviced to keep it running efficiently?
- Most manufacturers and contractors recommend a service once a year, ideally before summer, covering filter cleaning, refrigerant checks, and coil cleaning. A neglected system with dirty filters or low refrigerant can lose a noticeable chunk of its rated efficiency within a year or two.
- What should I expect during the quoting and installation process?
- A proper quote should start with a heat load calculation for your specific rooms, not just a price per square metre. Expect the contractor to discuss zoning options, ductwork condition, and where the outdoor unit will sit for airflow and noise. Installation for a ducted system usually takes one to three days depending on house size and roof access.
- How can I judge whether a contractor's efficiency claims are legitimate?
- Ask for the specific energy rating label of the unit being quoted rather than general claims about it being 'green', and ask for an estimated annual running cost based on your usage pattern. A contractor who can walk through the star rating, the zoning plan, and the ductwork condition is generally more trustworthy than one who just points at a brand name.
Guides to choosing energy efficient / green systems
- Cutting your aircon running costs in WA without buying a new system
Practical, no-cost and low-cost ways to reduce what your existing air conditioner costs to run through a Perth summer, without replacing it.