Maxim Air has installed and serviced air conditioning in the Hills Shire District for over 20 years.

Based in Castle Hill, our experienced technicians can design and install a custom cooling system for your home or commercial building that's tailored to your unique needs. We can also schedule air conditioning services and routine maintenance to keep your system operating at peak efficiency.


We service all suburbs in the Hills Shire District and North-Western Sydney, including:

  • Annangrove & Glenhaven - NSW 2156
  • Baulkham Hills - NSW 2153
  • Beaumont Hills - NSW 2155
  • Bella Vista - NSW 2153
  • Box Hill - NSW 3128
  • Castle Hill - NSW 2154
  • Galston - NSW 2159
  • Glenorie - NSW 2157
  • Kellyville - NSW 2155
  • West Pennant Hills - NSW 2125

Do I need air conditioning?

Air conditioning is essential for coping with Sydney's sweltering summers, which are getting hotter every year. The Hills District reaches a maximum temperature of 29.2°C in January and stays warm for most of the year.

Your air conditioner can even keep you warm in the cooler months of the year, when the temperature drops as low as 3.5°C in July. Reverse cycle air conditioning provides both heating and cooling from the same unit and is more efficient than installing and running a separate heater.

Air conditioning isn't only useful for maintaining comfortable temperatures indoors. These systems also reduce humidity levels, preventing damp and mould growth, and have filters to keep out pollen and other allergens to improve the indoor air quality. You'll also be able to close your windows and keep out irritating pests.

What type of air conditioner should I choose?

We install all types of cooling and heating systems across North West Sydney. When you book an obligation-free consultation with Maxim Air's air conditioning specialists, we'll inspect your property and listen to your needs and wants, so we can recommend the most suitable systems for you. These may include:

  • Ducted systems – discreet and efficient cooling for a whole building, with no bulky wall units and a single roof-mounted compressor. We also install ducted gas heating.
  • Split systems – compact indoor units connected to outdoor compressor units. We also offer multi-head split systems and VRF/VRV systems that only require a single outdoor unit.
  • Packaged air conditioners – all-in-one cooling and heating units ideal for single-floor commercial and industrial premises.
  • Mechanical ventilation – roof ventilators, ceiling fans, dehumidifiers, exhaust systems and air supplies to keep enclosed spaces cool and fresh.

We only deal with trusted brands and high-quality, energy-efficient products, so whatever system you choose, you can look forward to consistent cooling and lower energy bills. We install everything from individual units for rooms or small apartments to complex systems that can cool a whole building.

We can also discuss advanced features like individual zone controls, noiseless operation and AirCon Smart App Controller & Automation to help you get even more out of your air conditioning.

Why choose Maxim Air?

We have more than 20 years' experience installing and servicing all types of air conditioning in the Hills Shire District and wider Sydney. We always put the customer experience first and will recommend the best cooling solution for your needs, as well as instructing you in how to use and maintain the system for optimal performance.

Our technicians are fully licensed and insured, and we pride ourselves on not leaving any mess behind after installation. We'll arrange your free air conditioning consultation at a time that's good for you, so we can give you an honest quote with no obligation to continue.

Get your obligation free quote today

Get in touch with our air conditioning experts to book a free consultation in the Hills Shire District, North-Western Suburbs or other Sydney metropolitan areas.

Call us now or get in touch online.

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Rated 4.9
From 51 Reviews
  • Haixi Yang Avatar

    Maxim is one of the best company to work with. Professional, punctual and very friendly, they did a fantastic job. I highly recommend them.

    Haixi Yang 21/10/2018
  • Paul Kangro Avatar

    I had several companies quote to replaced my existing, very old, ducted system. Maxim was the only company to actually listen to what I wanted and make great suggestions - and they delivered a quote that was much lower than I had expected. They turned up on the agreed day and worked till the job was done - no corners were cut - the quality of the install was excellent. It was a very large complex job. They cleaned up everywhere - it was like they had never been there. They left very late at night, after a very early start. Before they left I found them with a torch going over my driveway in detail to make sure no screws had been left that i would drive over - you don't see that attention to detail often. The large team we had working at our place were all very courteous and friendly. For value, integrity and a very high standard or workmanship - I would recommend Maxim to anyone without hesitation.

    Paul Kangro 20/10/2018
  • Brian Chuong Avatar

    Stephen provided a detailed explanation of the installation process. Air con installed 1 month ago, with new duct, motor and unit. So far so good. The customer service was good, and the price reasonable.

    Brian Chuong 17/10/2018
  • Sasha Kovic Avatar

    Maxim did a great job installing ducted aircon into my new house. The guys were very professional and offered good practical solutions compared to others who looked at the job. I would definitely recommend them to friends and use them again.

    Sasha Kovic 15/10/2018
  • Brian Chuong Avatar

    Stephen provided a detailed explanation of the installation process. Air con installed 1 month ago, with new duct, motor and unit. So far so good. The customer service was good, and the price reasonable.

    Brian Chuong 15/10/2018
  • James Wakeham Avatar

    Friendly service and honest advice. Fixed the a/c unit with a simpler fix (which may or may not last) rather than going straight to the expensive fix

    James Wakeham 11/09/2018
  • smiley r Avatar

    Aaron delivered on his promise to do the job on time (our tight time-line) and on budget (best quote received). Technicians Matt and Vic were very punctual, very polite, tidy, efficient and helpful. Maxim is highly recommended.

    smiley r 21/08/2018
  • nick alaveyan Avatar

    We had one of the best experience in the trade industry dealing with Maxim air-conditioning quality of the service was unbelievable the idea from the director of the company regards to designing the grills are fabulous they did they best to provide the high-quality and the clean job with the lowest price for us.

    We do highly recommend people to use these kind of service as much as we satisfied and happy we wish the same to other customer send

    nick alaveyan 16/08/2018
  • Mabel Cheng Avatar

    Stephen provided a good air-con service to my new home. He gave professional advice with a reasonable price.

    Bellevue Hill

    Mabel Cheng 25/07/2018
  • Uzma Raza Avatar

    Fantastic service! Stephen was very helpful and professional right from the start. My house had a very small roof space which made the job very challanging, but he took it onboard and made things work. The boys were very friendly and professional. Would highly recommend MaXim Air to my family and friends. Thank you

    Uzma Raza 28/06/2018

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