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 also Provide air conditioning services, maintenance and repairs to North Shore Sydney and all across Sydney.

Hills-Shire-District-Sydney-NSW-Google-Map

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.

Maxim Air Google Maps
Rated 4.9
From 51 Reviews
  • Tom Williams Avatar

    The team at MaXim Air are extremely professional and friendly. They provided expert advice and suggestions during the initial quote for a ducted system, which was also highly competitive. The installation went flawlessly, they even helped fix up a sagging ceiling when installing the ducted vents. They truly went above and beyond in making sure I was 100% happy with the job. I would highly recommend MaXim Air Conditioning.

    Tom Williams 03/12/2018
  • Helen Devitt Avatar

    Arran provided expert advice and ideas (that no one else had suggested) for the initial quote for our ducted air conditioning. The quote was very competitive. We received reminders of the installation day via text prior to installation. On the day of installation Victor and his team arrived on the dot of 7am and worked all day until the job was completed. They were very conscientious and cleaned up thouroughly. Would highly recommend MaXim air conditioning services.

    Helen Devitt 01/12/2018
  • Calvin and Kimberley Avatar

    Maxim recently installed 2 split system air conditioners for us and we were very pleased with their excellent service. Stephen and his team were efficient, hardworking, professional, and pleasant to deal with. We were impressed with the effort that the team went to in ensuring we were happy with the position of the units in each room, and making sure the areas were tidy and all rubbish removed after installation. The team was punctual and completed the tasks within the quoted time frame. We also were grateful for the quick responses to our queries. We would highly recommend Maxim. Thank you Stephen and team.

    Calvin and Kimberley 18/11/2018
  • Andrew Wild Avatar

    Excellent service from the Maxim team. A bit late (due at 7am which is too early on a Saturday anyway!) but no concern as they did a great job and were very helpful. Highly recommended.

    Andrew Wild 17/11/2018
  • tony camilleri Avatar

    Stephen from Maxim gave excellent service & advice. Repaired my air con unit on time and as quoted. I would highly recommend this company

    tony camilleri 14/11/2018
  • 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

Book an air conditioning service or installation in The Hills Shire District