Replacement of Ducted Air Conditioning in Office.
Main Steps in 2025

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🔑 Page Key Points

✅ Key Points – Replacement of Ducted AC in Office in 2025

  • Why Replace an Old Ducted AC – Old systems are inefficient, costly, and outdated.

  • Obsolete Refrigerant (R-22) – No longer available; replacement is required.

  • No Spare Parts – Discontinued models make repairs impossible.

  • Major Breakdowns – Compressor or PCB failure = replace unit.

  • Improved Energy Efficiency – Modern units use less energy overall.

1. Why Replace an Old Ducted Air Conditioner?

When an office ducted air conditioning system becomes outdated or breaks down beyond repair, replacement is often the only option. Installing a new ducted AC improves comfort, energy efficiency, and reliability.

  • Obsolete refrigerant (R-22): Many old systems still use R-22 refrigerant, which is no longer available on the market.

 

  • No spare parts: Older models often have discontinued parts such as compressors or control boards, making repairs impossible.

 

  • Major breakdowns: A failed compressor or PCB usually means replacement is more cost-effective than repair.

 

  • Energy efficiency: Modern ducted air conditioners use less energy and meet current standards.
Old slightly rusty outdoor ducted air conditioning unit in front of a modern office building

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2.Main Steps to Replace Ducted AC in an Office

2.1. System Assessment

 

  • Inspect the existing ducted air conditioning system.

 

  • Identify the location of the outdoor condenser.

 

  • Plan safe removal of the outdoor unit (crane or lifting equipment may be required if installed on the roof).
HVAC technician assessing an indoor ducted air conditioning unit laying on the floor of a modern office
HVAC technician disconnecting power cables of a two-fan outdoor ducted air conditioning unit in front of an office building

2.2. Preparation for Removal

 

  • Clear the ceiling space to access the indoor unit.

 

  • Disconnect the power supply.

 

  • Safely remove refrigerant in line with regulations.

2.3. Check Existing Ductwork

 

  • Inspect ducts, grilles, and return air pathways.

 

  • Ensure the ductwork is suitable for the new ducted air conditioner’s airflow.

 

  • Upgrade ducting if necessary for efficiency and comfort.
HVAC technician inspecting a ducted air conditioning ceiling grille in a modern Sydney office (not a cassette unit), using ladder and safety gear.

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3. Further Steps to Replace Ducted AC in an Office

3.1. Installation of New Units

 

  • Remove the old indoor and outdoor units.

 

  • Install the new indoor unit in the ceiling space.

 

  • Mount the outdoor condenser; use lifting equipment if required.

 

  • Connect refrigerant piping, drains, and electrical supply.
Two HVAC technicians lifting a ducted air conditioning indoor unit into an office ceiling void in Sydney.
HVAC technician balancing airflow at a ducted AC supply grille in a modern Sydney office using a balometer.

3.2. Airflow Balancing

  • Adjust airflow across supply grilles and outlets.
  • Ensure fresh air ventilation is integrated via the ducted AC or a separate system.

3.3. Commissioning and Testing

 

  • Test run the ducted air conditioning system.

 

  • Check cooling and heating functions.

 

  • Verify energy efficiency and comfort levels.

 

  • Provide final handover and system documentation.
HVAC technician inspecting a brand-new ducted AC outdoor unit with two fans beside a modern Sydney office wall.

Benefits of Regular Air Conditioning Servicing

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4. Office Ducted Air Conditioning Replacement Services

Professional replacement ensures long-term performance and compliance with Australian standards. Whether your old ducted AC has failed or is simply too inefficient, upgrading to a modern system will improve comfort for staff and reduce running costs.

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5. Frequently Asked Questions (FAQ)

Q1: When should I replace my ducted AC?
You should consider replacing your ducted air conditioner if it’s over 15 years old, inefficient, frequently breaking down, or using outdated refrigerant.

Q2: Can I replace only the indoor unit?
Generally no — indoor and outdoor units must be compatible in capacity, refrigerant type, and control systems to function correctly.

Q3: How long does replacement take?
A typical ducted air conditioning replacement in an office setting takes 1–3 days, depending on building layout, accessibility, and system size.

Q4: Will my old ductwork fit the new system?
Often it can be reused, but technicians will carefully inspect, seal, and balance airflow to ensure maximum efficiency and comfort.

Q5: What are the benefits of upgrading?
Upgrading delivers quieter operation, lower power consumption, improved indoor comfort, smarter temperature control, and long-term energy savings.

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6. How Air Cooling Can Help

We’re proud to be your local Sydney air conditioning system specialists, offering a full range of services to cover every aspect of your air conditioning system needs. Our team understands Sydney’s unique climate and housing requirements, and we tailor our services to ensure you get the most out of your air conditioning. Here’s how we can help:

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  • Expert Installation

Correct installation is vital for your air conditioning system’s efficiency and longevity. At Air Cooling, we provide professional split, ducted, and multi-split installations in Sydney across all major brands. Our technicians ensure the right capacity and placement for reliable cooling on Sydney’s 40°C summer days and energy-efficient heating in winter. We handle mounting, electrical and refrigerant connections, and compliance with local regulations and strata requirements. Every system is fully tested, and we guide you through controls and settings for maximum comfort.

 

  • Maintenance & Servicing

Your AC works best with regular servicing. Our packages cover filter cleaning, refrigerant checks, coil inspections, and fan testing. Annual maintenance helps avoid breakdowns, extends lifespan, and ensures clean indoor air quality by preventing dust and mould build-up. We recommend scheduling service in spring to be ready for summer.

 

  • Repairs & Support

If your unit isn’t cooling, is noisy, or shows errors, we provide fast repairs across Sydney. Our skilled technicians carry common parts and service all major brands, aiming for same-day fixes. From leaks to electrical faults, we restore comfort quickly. If repair isn’t cost-effective, we give honest replacement advice.

 

  • Consultation & Sizing Advice

Not sure what’s best for your home or business? We offer obligation-free consultations with tailored recommendations for Sydney’s diverse housing – from apartments to large family homes. By considering room size, insulation, and usage patterns, we recommend the most energy-efficient system to deliver year-round comfort and reduce running costs.

✅ Servicing all Sydney suburbs with fast response

✅ Competitive pricing & transparent quotes

✅ 10+ years experience across Sydney

✅ Fully licensed ARCtick technicians

✅ 24/7 emergency service

✅ 5-star Google reviews

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