We’re Keysborough’s heating and cooling experts.

Dias Air have been providing quality heating and cooling solutions around Keysborough since back in 2007. Over that time we’ve serviced thousands of happy customers in both the residential and light commercial heating and cooling market.

We have a highly trained team of professional technicians who are well experienced in working with our range of systems, across all major brand names on the market. We pride ourselves on providing not only the highest quality of workmanship, but also the best customer service that you’ll get from a heating and cooling company.

If you’re looking for the best heating or AC service provider, choose Dias Air.


Dias Air provides the following services services across Keysborough and Melbourne’s south eastern suburbs:

Whatever your needs, give Dias Air a call today and we will work with you to provide the best solution to fit your specific situation – whether that’s for a brand new system, or repairs or maintenance or your existing system.



Every customer is unique, and has different requirements when it comes to their air conditioning needs. We aim to cater to all needs in the residential and light commercial market, which means we install, service and repair many types of air conditioning systems and brands.

Wall Split Systems

Suited for cooling a specific room – such as a bedroom, office or lounge room – wall split systems are an excellent choice for cooling your home. The technology in these units has advanced in recent years which means they are much more efficient.

Ducted Split Systems

These systems work on much the same principle as wall split systems, but they heat and cool the whole house via concealed ducts. Requiring a slightly higher investment to install, ducted split systems offer the best in quality, convenience and energy efficiency.

Evaporative Cooling

The best option if you’re on a budget – evaporative cooling is highly efficient without compromising on quality.

Add-On Cooling

This unit is basically used to heat rooms through a gas deducted heater. Some minor modifications can transform it into a cooling system. This saves you money by eliminating the need to install separate heating and a cooling units.


Along with our air conditioning systems, we also offer a range of heating solutions:

Wall split systems

As mentioned above, the wall split system is a very versatile unit that is best suited to single room use. Use in winter as a heater, or summer as a cooling system!

Ducted Split Systems

Heat is delivered to individual rooms throughout your home via strategically placed ducts throughout your home. If you want the top of the range heating system, go for a ducted split system!

Gas heating

Gas heating is one of the most cost efficient ways to keep your house warm. With energy prices constantly rising, gas heating will help you keep energy bills down throughout the chilly Melbourne winter.


100% Quality Assurance

All of our tradesmen are qualified plumbers and members of the Masters Plumber Association. We have built our excellent reputation over the last ten years by providing top quality workmanship and excellent customer service, ensuring that all customers walk away happy and satisfied with the work we’ve done.

  • Family owned and operated since 2007
  • Licensed Plumbers, and Members of Master Plumbers Association
  • 6 Year Workmanship Guarantees
  • Highly competitive pricing
  • 24 / 7 + emergency availability
  • We install, service and repair all major brands and systems

Work with Keysborough’s heating and air-conditioning professionals. Give Dias Air a call today.

Dias Air Service the Keysborough area for heating and air conditioning


Dias Air work with all major models for heating and cooling and would be delighted to work with you to provide advice and solutions for heating and cooling your home.