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 and noiseless operation 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 on (02) 9051 0652 or get in touch online.

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