Older homes are full of charm, but that charm can quickly fade on a hot summer day when cooling becomes a challenge. Thick brick walls, minimal insulation, and limited roof or wall space often make installing modern air conditioning tricky. Experts at All Coast Air Conditioning specialise in tailoring systems that blend comfort with preservation. In this guide, we’ll break down the best air conditioning options for older homes, from easy-to-install split systems to energy-efficient ducted and multi-split alternatives.
Understanding your air conditioning options can help you stay cool year-round without sacrificing the character of your heritage home. Let's get started!

Split System Air Conditioning for Older Homes
When it comes to maintaining comfort in older homes, split system air conditioning offers a versatile and efficient solution. Designed to provide targeted cooling without requiring major structural changes, these systems are an excellent choice for homeowners seeking to upgrade their living environments while protecting the original woodwork and architectural detailing. Below, we explore why split systems are ideal for such homes, the flexible installation options available, and the pros and cons.
Why Split Systems Suit Older Homes
Older homes often come with unique architectural features and constraints that make installing traditional ducted air conditioning systems challenging. However, split system air conditioners require only a small hole for the connecting pipes and cables.
- Minimal Structural Impact: Unlike ducted systems, which may require extensive ceiling or wall modifications, split systems consist of an indoor unit and an outdoor unit connected by pipes. This setup ensures that the installation process is minimally invasive.
- Room-by-Room Control: Split systems allow for targeted cooling, meaning you can install units in specific rooms or areas where cooling is most needed. This feature is beneficial in older homes, which might have rooms with varying insulation levels and sun exposure.
Adaptable for Tight Spaces
Older homes often have limited cavity space, which can pose a challenge for the installation of traditional air conditioning systems. Split system air conditioning, however, offers flexible solutions that can adapt to these constraints.
- Compact Indoor Units: The indoor units of split systems are designed to be compact and can be mounted on walls, floors, or ceilings, making them suitable for rooms with limited space. This versatility ensures that even the most architecturally challenging homes can benefit from modern cooling technology.
- Outdoor Unit Placement: The outdoor units can be placed up to 30 metres away from the indoor units, allowing for optimal placement to maintain the aesthetic appeal of your home’s exterior.
Pros and Cons for Homeowners
While split system air conditioning is an attractive option for many reasons, it is important to consider the advantages and potential drawbacks before making a decision.
Pros
- Energy Efficiency: Many models come with inverter technology that adjusts the compressor speed to maintain the desired temperature without consuming excess energy.
- Quiet Operation: These systems are designed to operate quietly, providing a comfortable environment without the intrusive noise that can accompany other types of air conditioning systems.
- Customisable Solutions: Homeowners have the flexibility to choose different models and sizes tailored to the specific cooling requirements of each room.
Cons
- Initial Cost: The upfront cost of purchasing and installing a split system can be higher compared to portable air conditioners. However, the long-term energy savings often offset this initial investment.
- Maintenance Needs: Regular maintenance is required to ensure optimal performance and longevity. Filters need to be cleaned or replaced regularly to maintain air quality and system efficiency.
- Aesthetic Considerations: While indoor units are designed to be unobtrusive, they are still visible within the room, which may not appeal to all homeowners.
Can You Install Ducted Air Conditioning in an Older Home?
The allure of ducted air conditioning lies in its ability to provide comprehensive climate control throughout an entire home, offering a seamless and unobtrusive solution. For owners of older homes, the question often arises: Is it feasible to install a ducted system in a property that wasn't originally designed to accommodate modern air conditioning? Let's explore the possibilities, benefits, and potential challenges.
When Ducted is Possible: Roof Space and Underfloor Access
The possibility of installing ducted air conditioning in an older home largely hinges on the availability of sufficient roof space or underfloor access.
- Roof Space: For homes with ample attic space, a ducted system can often be installed without structural modifications. The system's main unit is typically housed in the roof cavity, with ducts running throughout the roof space to supply air to various rooms.
- Underfloor Access: In older homes with raised foundations, underfloor access provides an alternative pathway for duct installation. This involves running ducts beneath the floorboards, which can be advantageous in preserving the aesthetic integrity of the home's interior.
The Benefits of Whole-Home Comfort
Opting for this type of air conditioning offers several advantages, especially for older homes where room-specific solutions might disrupt historical or architectural features.
- Consistent Temperature Control: Ducted systems provide uniform temperature distribution throughout the home, eliminating hot or cold spots that can occur with individual units. This is helpful in homes with large or multiple rooms.
- Aesthetic Integration: With ducted aircon, there are no visible units or extensive wall modifications, allowing the home to retain its original charm and character. The only visible components are the discreet vents and a central control panel.
- Energy Efficiency: Modern ducted systems are designed with energy efficiency in mind, often featuring zoning capabilities that allow you to cool only the areas in use. This can result in energy savings, especially in larger properties.
Potential Obstacles and Workarounds
While the benefits are substantial, several potential challenges may arise during installation. Fortunately, there are workarounds for many common obstacles.
- Structural Limitations: Older homes may have structural limitations that restrict the installation of ductwork. Conduct a comprehensive structural assessment to identify any necessary reinforcements.
- Heritage Considerations: For heritage-listed properties, modifications may be restricted to preserve historical value. In such scenarios, consulting with heritage specialists and obtaining necessary approvals is crucial.
- Electrical Capacity: Older homes may have outdated electrical systems that are insufficient to support a modern air conditioning system. Upgrading the electrical infrastructure is often necessary, which involves an assessment by a qualified electrician.
- Insulation and Sealing: Ensuring adequate insulation and sealing is vital for the efficiency of a ducted system. Older homes often have outdated insulation, which might need upgrading to prevent energy loss.

Multi-Split Systems: Zoned Comfort for Character Homes
Maintaining the charm and integrity of older homes in the Central Coast ensures optimal comfort, and multi-split air conditioning systems stand out as a leading solution. These systems offer a flexible and efficient way to cool multiple rooms with minimal disruption to the existing structure. Let's discuss why multi-split systems could be the perfect fit for your character home.
Understanding Multi-Split Systems
A multi-split system consists of one outdoor compressor unit connected to multiple indoor units. Unlike single-room systems, multi-splits let you set different temperatures across multiple rooms—ideal for homes with varied usage patterns or sun exposure throughout the day. Whether you have a sprawling estate with numerous extensions or a cosy cottage with distinct living zones, a multi-split system can cater to your specific cooling needs.
Ideal for Homes with Multiple Living Zones
Older homes often feature unique layouts with multiple living areas, each with its own cooling requirements. A multi-split system is advantageous in these scenarios as it allows you to control the temperature in each zone. This means you can cool the living room during the day and set a different temperature in the bedrooms for a comfortable night's sleep.
Minimal Disruption to Existing Walls and Ceilings
One of the primary concerns when retrofitting air conditioning into older homes is preserving the original architecture and avoiding extensive structural modifications. Multi-split systems are designed with this in mind. The installation process requires minimal intrusion, as the outdoor unit connects to the indoor units through small conduits. This means you can enjoy the benefits of modern air conditioning while respecting the design history of the home.
Flexibility and Customisation
Multi-split systems offer remarkable flexibility in terms of placement and customisation. Indoor units come in various styles, such as wall-mounted, floor-standing, or ceiling cassette designs, allowing you to choose an option that best suits your home's interior. This adaptability ensures that the system complements your home's decor while delivering efficient cooling performance.
Enhancing the Heritage Experience
Older homes often come with a storied heritage and distinctive charm. Multi-split systems enhance this experience by providing a comfortable environment that allows you to fully enjoy your home's unique character without the distraction of temperature extremes. Whether it's a hot summer day or a chilly winter evening, you can maintain the perfect indoor climate, preserving the comfort and allure of your character home.
Energy Efficiency Considerations for Older Properties
Energy efficiency is a crucial factor to consider in selecting the right air conditioning system. Older properties often present unique challenges that can impact the performance and efficiency of an air conditioning system. In this section, we will learn how system size and design, insulation upgrades, and practical tips can enhance energy efficiency in these homes.
Why System Size and Design Matter for Efficiency
Choosing the right size and design of an air conditioning system is vital for maximising energy efficiency in older homes. A poorly sized unit wastes energy and drives up your power bills.
- Oversized Systems: A unit that’s too large will turn on and off too often, wasting energy and wearing down parts. It can also cause uneven temperatures and excess indoor humidity.
- Undersized Systems: A small unit will run nonstop, trying to keep up, raising energy costs and reducing efficiency. It also puts extra strain on the system over time.
- Customised Design Solutions: Given the architectural features and layouts of older homes, customised air conditioning solutions, such as ductless mini-split systems or zoned HVAC systems, can offer better efficiency. These systems allow for targeted cooling, reducing energy waste by only conditioning the areas that are in use.
Insulation Upgrades to Improve Performance
Improving insulation is one of the most effective ways to enhance the performance of an air conditioning system. Good insulation keeps temperatures steady and takes pressure off your air conditioner.
- Attic and Wall Insulation: Adding insulation to attics and walls helps block summer heat, so your air conditioner doesn’t have to work as hard.
- Window and Door Sealing: Many older homes suffer from draughty windows and doors, which can lead to energy loss. Weather stripping and window films help seal gaps, boosting both insulation and air conditioning performance.
- Floor Insulation: For homes with uninsulated floors or crawl spaces, installing floor insulation can prevent heat from entering the home through the ground, enhancing the effectiveness of the air conditioning system.
Tips to Lower Running Costs in Draughty or Uninsulated Homes
Even the best aircon can cost a fortune to run if your home isn’t properly insulated. Here are some tips to help mitigate these challenges:
- Regular Maintenance: Regular servicing keeps your system running efficiently. Clean filters, check refrigerant levels, and fix any duct leaks.
- Programmable Thermostats: A programmable thermostat helps cut costs by cooling only when needed. Set a schedule that matches when you're home.
- Ceiling Fans and Ventilation: Use ceiling fans to complement the air conditioning system. Fans help circulate cool air throughout the home, allowing for higher thermostat settings without sacrificing comfort.
- Shade and Window Treatments: Block direct sun with blinds or curtains to keep rooms cooler and reduce the load on your aircon.
Choosing the right air conditioning system for your older home means balancing comfort, efficiency, and heritage value. Whether you opt for a flexible split system, a whole-home ducted setup, or the versatility of a multi-split, the key is finding what works for your home’s unique design. At All Coast Air Conditioning, we specialise in blending modern climate control with timeless charm. Reach out today to book a consultation and take the first step towards year-round comfort in your character home.
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