Blacktown, NSW - September 8, 2026 - Sydney households choosing an air conditioner based on price or room size alone could be setting themselves up for higher running costs and unnecessary wear, according to the local air conditioning experts, MyTradie Air Conditioning.
Selecting a correctly sized system is one of the most important steps when choosing an air conditioner. According to the experts, a wrongly sized air conditioner can use more energy, and a larger unit may cost more to run even if it has the same energy star rating as a smaller one.
MyTradie Air Conditioning says proper system selection should take into account more than floor area. The company's technicians assess factors including room size, ceiling height, insulation, windows, sunlight exposure, and occupancy before recommending an air conditioning system in Inner West Sydney.
Daniel Lorenzo, Owner of MyTradie Air Conditioning said, "People often assume that buying the biggest air conditioner they can afford will cool the home faster and therefore cost less to run, but that is not how a properly designed system works. The system needs to match the actual heat load of the property. If it is too small, it may struggle to reach the required temperature and work excessively. If it is oversized, you can also end up with inefficient operation, unnecessary upfront expense, and a system that is poorly matched to the way the home is actually used."
Older homes can present additional challenges including insulation limitations, varying ceiling heights, window exposure and restricted installation space. MyTradie says professional assessment is therefore an important part of any air conditioner installation.
Energy efficiency can also have a substantial long-term financial impact. In April 2026, the Australian Government reported that, in one example, a 7.5-star reverse-cycle split system with 2.65kW cooling capacity could save $2,866.40 over 10 years compared with a two-star system of the same output capacity, which is a 37% reduction in running costs. They emphasise that these efficiency benefits depend on selecting a system that is appropriately sized for the space.
"Correct sizing is only part of the equation," Lorenzo said. "Installation quality, airflow, placement, insulation, electrical connections and the way the customer operates the system all affect performance. Our job is to look at the property as a whole, recommend the appropriate equipment, install it according to manufacturer requirements and show the customer how to use it effectively. A good result should provide comfortable temperatures throughout the year without making the system work harder than it needs to."
MyTradie Air Conditioning is a Sydney air conditioning company with more than 13 years of industry experience. The business provides installation, AC repair and air conditioning servicing for domestic and commercial systems.
The company's technicians are fully licensed and insured, and MyTradie is an ARCtick Certified Contractor. The business also offers upfront pricing, ongoing aftercare support, and a lifetime workmanship warranty on eligible work.
Experts suggest that adjusting heating or cooling by just one degree beyond recommended settings can increase energy use by around 5% to 10%, reinforcing the importance of correct system selection, operation and maintenance.
Homeowners and businesses across Sydney can contact MyTradie to arrange a quote or book a technician. The company offers same-day service where available, and supports leading air conditioning brands including Actron Air, Daikin, Mitsubishi, Fujitsu, and more.
Frequently Asked Questions
1. How do I know what size air conditioner I need?
It depends on the room size, insulation, windows, building materials, and local climate. A qualified technician can assess these factors and recommend the right capacity.
2. What happens if an air conditioner is too small?
An undersized system may run for longer and struggle to maintain the desired temperature, which can increase energy use and running costs.
3. Can an air conditioner be too large for a room?
Yes. An oversized system can cost more to buy and run, and a significantly oversized unit may operate less efficiently.
4. Do more energy stars always mean lower running costs?
Not when comparing different-sized systems. Star ratings should be compared between air conditioners with similar capacities and features.
5. What temperature should I set my air conditioner to in summer?
Experts suggest setting the AC temperature to around 25-27°C in summer. Lower settings can increase electricity costs.
About Company:
MyTradie Air Conditioning is a family owned and operated business specialised in air conditioning repairs and servicing for residential and commercial customers. Visit https://mytradieservices.com.au/
Media Contact
Company Name: MyTradie Air Conditioning
Contact Person: Daniel Lorenzo
Email: Send Email
Phone: +61402155761
Address:24 douglas road
City: Blacktown
State: NSW
Country: Australia
Website: https://mytradieservices.com.au/