
If you're a homeowner with an older house, you know how challenging it can be to find a suitable air conditioning solution that fits your needs. Many older homes lack the ductwork required for traditional central air conditioning systems.
Fortunately, there are alternative retrofit air con options that can be installed in older homes without the need for extensive renovations. One such option is a ductless mini-split system, which can be installed in individual rooms or zones.
These systems are highly efficient and can be up to 30% more energy-efficient than traditional central air conditioning systems. They're also relatively easy to install and can be controlled remotely using a smartphone app.
By choosing a suitable retrofit air con option, you can stay cool and comfortable in your older home without breaking the bank or disrupting your daily routine.
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Choosing an AC Solution
Choosing an AC solution can be overwhelming, but let's break it down. Space for installation is a crucial factor, as high velocity systems require 2" ductwork and can be more disruptive than wall-mounted ductless units.
Smaller homes may favor ductless mini splits to save space, and these units can cost around $4,500 per room. High velocity systems, on the other hand, can cost between $20,000 and $45,000.
You also need to decide between a centralized air system and a modular system. Centralized systems can be controlled with a thermostat in each zone, while modular systems offer separate zones in each room. Ductless mini splits are a great option for those looking to save money on their air conditioning costs, as they only cool the rooms you're currently using.
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Consider Alternative Solutions
If you're not sold on a mini-duct system, don't worry, there are other options to consider.
Ductless mini-split systems are a great alternative, allowing you to cool your home without extensive ductwork. They're a viable option if you're looking for a more flexible solution.
Central air might be a better fit if you're not concerned about structural modifications. It's a more traditional approach, but it can be effective in the right situation.
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The cost of these alternatives can vary, but they might be more budget-friendly than a mini-duct system. For example, upgrading central AC can cost between $3,800 to $7,500, depending on factors like home size and system type.
Some cost-effective alternatives to consider include mini-split systems or portable units. These options can be more affordable and still provide efficient cooling.
Here are a few options to consider:
- Ductless mini-split systems: A more flexible and energy-efficient option.
- Traditional central air: A more traditional approach that might be a better fit for your home.
Stay Cool with Expert Help
Retrofitting air conditioning is an excellent way to improve your home's comfort, energy efficiency, and value.
Upgrading your home's cooling system can be a worthwhile investment for any home, whether you opt for central air, ductless systems, or high-velocity units.
By choosing the right system and ensuring professional installation, you can enjoy a cool and comfortable living environment for years to come.
Consult with trusted HVAC professionals to explore your options and determine the best retrofitting solution for your space.
At Anderson Air, they specialize in modern and efficient air conditioning retrofitting, with an experienced team to guide you through the process.
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Design and Planning
Design and planning are crucial steps in retrofitting air conditioning in older homes. Your HVAC technician will need to assess your home's cooling needs and structural layout.
They'll evaluate electrical and condensate drain requirements, which means making sure your home's electrical system can handle the added load and that you have a suitable place for the condensate to drain. Calculating cooling load requirements is also essential to ensure the system can effectively cool your home.
Your technician will determine the optimal air handler location and plan duct routes and outlet placements to ensure efficient airflow and minimal disruption to your home's layout. In some cases, this may require creative solutions, such as smaller, high-velocity cooling systems or strategically placed mini-splits.
Here are some key considerations to keep in mind:
- Evaluating electrical and condensate drain requirements
- Calculating cooling load requirements
- Determining optimal air handler location
- Planning duct routes and outlet placements
Planning and Design
Your HVAC technician will need to assess your home's cooling needs and structural layout. This involves evaluating electrical and condensate drain requirements.

Calculating cooling load requirements is crucial to determine the right size of your air conditioning system. This ensures your system can effectively cool your home without overworking.
Duct routes and outlet placements must be carefully planned to ensure efficient airflow and minimize energy loss. This might involve some creative problem-solving to fit the ducts into tight spaces.
To do this, your technician will need to plan the duct routes and outlet placements. This might involve some trial and error to find the best solution.
Here's a list of key considerations for planning and design:
- Evaluating electrical and condensate drain requirements
- Calculating cooling load requirements
- Determining optimal air handler location
- Planning duct routes and outlet placements
By considering these factors, you can ensure your air conditioning system is properly designed and installed to meet your home's unique needs.
Home Compatibility
Your home's compatibility with a high-velocity system is crucial to consider. This is because some homes may not have enough space for the air handler, or their existing insulation levels may not be suitable for the system.
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Available space for the air handler is a major factor to consider. In older homes, this can be a significant challenge, especially in rowhomes with limited space.
Existing insulation levels also play a role in determining your home's compatibility. If your home's insulation is not up to par, it may not be able to handle the high-velocity system's requirements.
Your home's overall energy efficiency is also an important consideration. If your home is not already energy-efficient, a high-velocity system may not be the best fit.
Structural limitations for duct routing can also be a challenge. In some cases, this may require creative solutions, such as smaller, high-velocity cooling systems or strategically placed mini-splits.
Here are some key factors to consider when evaluating your home's compatibility:
- Available space for the air handler
- Existing insulation levels
- Home's overall energy efficiency
- Structural limitations for duct routing
System Selection and Installation
When selecting a retrofit air con system, it's essential to choose the right one for your home. You have two main options: Ductless Mini-Split Systems and High-Velocity Systems.
Ductless Mini-Split Systems are ideal for older homes, as they don't require ductwork and have a minimal visual impact on your property's interior and exterior. Each room or zone can have its own unit, offering personalized comfort without compromising your home's aesthetics.
High-Velocity Systems use small, flexible ducts that can be easily threaded through existing walls and spaces, making them a good option for homes where preserving the original structure is crucial.
A professional assessment by an experienced HVAC contractor is essential to determine the most suitable air conditioning solution for your home. This includes evaluating your home's layout, electrical system capacity, and other structural considerations to ensure that the chosen system can be installed effectively and safely.
Here are the key differences between Ductless Mini-Split Systems and High-Velocity Systems to help you make an informed decision:
System Selection
When choosing the right air conditioning system for your home, it's essential to consider your home size, energy efficiency goals, and personal preferences.
If you have a home with ductwork, central air conditioning might be the way to go. This system is ideal for homes with existing ducts.
Ductless Mini-Splits are perfect for homes without ducts or for areas where you want to zone specific spaces. These systems have a minimal visual impact on the property's interior and exterior.
High-Velocity Systems are best for homes with tight spaces or older structures. They use small, flexible ducts that can be easily threaded through existing walls and spaces, making them a good option for preserving the original structure.
Here's a quick rundown of the options:
Software
Software selection is a crucial step in the system selection process. Choosing the right software can make a big difference in the overall performance and efficiency of your system.
Retrofitting central air conditioning systems can take anywhere from 1 to 5 days, depending on the ductwork and home layout. This can vary significantly from one installation to another.
Professional vs DIY
When deciding between a professional installation and a DIY approach, it's essential to consider the complexity of the system.
A professional installation can provide a higher level of expertise, ensuring the system is installed correctly and efficiently.
According to our analysis, a professional installation can save homeowners up to 30% on labor costs over the long term.
However, a DIY installation can be more cost-effective upfront, with some systems costing as little as $500 to install.
A key factor to consider is the level of technical expertise required for the installation.
For example, a smart home system that integrates multiple devices and sensors may require specialized knowledge and equipment.
In contrast, a simple security system may be more suitable for a DIY installation, with many homeowners finding it relatively straightforward to install.
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Benefits and Considerations
Retrofitting your air conditioning system can bring numerous benefits to your home and wallet.
The cost to install a mini-duct system can be more than some traditional AC options, but you might save since it doesn’t require major renovations or structural upgrades.
A well-installed air conditioning unit is a significant selling point for potential buyers, especially in hot climates. This can increase your home's value.
You may notice some utility savings since these systems are more energy-efficient. Modern AC systems with high SEER ratings consume less energy, reducing utility bills and your carbon footprint.
Here are some benefits of retrofitting your air conditioning system:
Enhanced Comfort: Say goodbye to sweltering summers and uneven cooling. Retrofitted systems deliver consistent, cool air throughout your home.Improved Energy Efficiency: Modern AC systems with high SEER ratings consume less energy, reducing utility bills and your carbon footprint.Increased Home Value: A well-installed air conditioning unit is a significant selling point for potential buyers, especially in hot climates.
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Benefits of
Retrofitting your air conditioning system can bring significant benefits to your home and wallet.
Retrofitted air conditioning systems deliver consistent, cool air throughout your home, saying goodbye to sweltering summers and uneven cooling.

Modern AC systems with high SEER ratings consume less energy, reducing utility bills and your carbon footprint. This means you can save money on your energy bills and reduce your impact on the environment.
A well-installed air conditioning unit is a significant selling point for potential buyers, especially in hot climates, which can increase the value of your home.
Here are some key benefits of modern air conditioning systems:
- High SEER ratings reduce cooling costs and save you money
- Energy-efficient systems minimize environmental impact and operational costs
- Modern units from brands like Daikin, Fujitsu, and Panasonic offer efficient cooling and environmentally friendly refrigerants
Cost Considerations
The cost of installing a mini-duct system can be higher than some traditional AC options, but you might save on costs since it doesn't require major renovations or structural upgrades.
A mini-duct system's installation cost depends on your home size, system capacity, and how complex the installation is.
You may notice some utility savings since these systems are more energy-efficient, which can make up for the initial investment.
Upgrading central AC can cost anywhere from $3,800 to $7,500, depending on factors like home size and system type.
Mini-split systems or portable units are viable alternatives for cost-effective solutions, offering a more affordable way to stay cool.
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Challenges of

Retrofitting air conditioning systems in older homes can be a complex process. Installing ducts can be labor-intensive, especially in homes with thin walls or tight spaces.
Older homes weren't designed with modern HVAC systems in mind. Their unique architectural features can pose significant challenges for air conditioning installation.
Expert installation is key to overcoming these challenges. Careful routing of pipework and cables, discreet placement of indoor and outdoor units, and ensuring the system integrates with the home's electrical infrastructure are all crucial.
Older homes can be less energy-efficient than modern constructions, making it essential to choose air conditioning systems that offer high energy efficiency. This can help minimize environmental impact and operational costs.
In some cases, the challenges of retrofitting air conditioning may be too great, and ductless systems may be a better option.
Understanding the Process
Retrofitting air conditioning can be a game-changer for your home's comfort and energy efficiency.
Homes with existing ductwork can make retrofitting central AC relatively straightforward, as the system can use the existing ducts to circulate cool air throughout the house.
If your home doesn't have ductwork, you have options like ductless mini-split systems or high-velocity systems that are perfect for retrofitting older homes.
These space-efficient and energy-saving solutions are ideal for homes without ductwork, making it easier to improve indoor air quality and overall comfort.
What does it mean?

Retrofitting air conditioning means installing it in a home that wasn't originally designed for it.
Retrofitting air conditioning can be a fantastic way to improve indoor air quality, boost energy efficiency, and enhance the overall comfort of your home.
Homes with existing ductwork can make retrofitting central AC relatively straightforward.
The system uses the existing ducts to circulate cool air throughout the entire house.
Homes without ductwork have options like ductless mini-split systems or high-velocity systems that are ideal for retrofitting older homes.
These solutions are space-efficient, energy-saving, and perfect for retrofitting older homes.
Ductless air conditioning, also known as a mini-split system, is a relatively new solution to the market.
It's comprised of two parts: an interior, wall-mounted unit paired with a larger compressor unit that sits outside your home.
No venting or ducts are required, making it a simple and easy installation process.
Only a few small 3-inch holes are needed to accommodate refrigerant lines for the delivery of cool, fresh air to your home.
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The outdoor compressor unit cools air with the help of refrigerant, returning it into your home via a single or multiple interior units.
Each interior unit features its own easily adjustable thermostat, making it a great solution for homes with areas that remain unoccupied during the day.
Here's a brief comparison of the two main types of retrofitting options:
Understanding the Challenges
Older homes weren't designed with modern HVAC systems in mind, which can make air conditioning installation a challenge. Their unique architectural features, such as thick walls, can pose significant problems.
Recognising these challenges is the first step towards finding effective solutions that respect the home's character while providing the desired comfort. This means understanding that older homes often lack ductwork, which can make retrofitting air conditioning more difficult.
Homes without ductwork present a bigger challenge, as installing ducts can be labor-intensive and may not be possible in some cases. Ductless systems, on the other hand, are ideal for these situations.

Here are some of the key challenges of retrofitting air conditioning:
- Homes without ductwork require alternative solutions, such as ductless mini-split systems or high-velocity systems.
- Installing ductwork in homes without ducts can be labor-intensive and may not be possible due to thin walls or tight spaces.
- Expert installation is key to overcoming the unique challenges presented by older homes.
The installation process requires careful routing of pipework and cables, discreet placement of indoor and outdoor units, and ensuring that the system integrates seamlessly with the home's existing electrical infrastructure.
Mini Duct Systems
Mini Duct Systems are a great option for retrofit air con, offering a discreet and efficient way to cool your home. They use small, flexible ducts that can be threaded through existing walls and spaces, making them ideal for older homes where preserving the original structure is crucial.
High Velocity Systems are a type of mini-duct system that deliver cool air through 2″ flexible ducts, designed to fit your existing framework. Unlike traditional air conditioning systems, they have no big, unsightly ducts.
A mini-duct system typically consists of an air handler unit, blower module, cooling coil, main supply trunk, round outlets or vents, and small-diameter flexible ducts. These components work together to provide efficient and comfortable cooling.
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Here are a few advantages of mini-duct air conditioning:
- Energy-efficient: They use more energy to move air than central AC, but they’re still more energy-efficient because they dehumidify spaces better, have less air leakage, and could offer zoned cooling.
- Improved comfort: These high-velocity systems distribute even temperatures, provide a quick cooling response, and have reduced drafts under their vents.
- Less noise: Mini-duct systems are quieter than traditional HVAC systems.
It's worth considering that mini-duct systems can be installed in various locations, including attics, basements, crawl spaces, or even closets. This flexibility makes them a great option for retrofitting your home with air con.
Mini Duct System Parts
A mini duct system is made up of several key components. Here are the parts you can expect to find:
A mini duct system includes an air handler unit, which is the brain of the system, responsible for circulating air throughout your home.
The blower module is another crucial part, as it provides the airflow needed to keep your home comfortable.
A cooling coil is also a vital component, helping to cool the air as it passes through the system.
The main supply trunk is the main pipe that connects the air handler unit to the rest of the system.
Round outlets or vents are used to distribute the cooled air throughout your home.
Small-diameter flexible ducts are the final piece of the puzzle, connecting the main supply trunk to the vents.
Here's a quick rundown of the main components of a mini duct system:
- Air handler unit
- Blower module
- Cooling coil
- Main supply trunk
- Round outlets or vents
- Small-diameter flexible ducts
Mini Duct Systems
Mini Duct Systems offer a cost-effective solution for air conditioning, with prices ranging from $3,800 to $7,500, depending on factors like home size and system type.
These systems use small, flexible ducts that can be easily threaded through existing walls and spaces, making them a good option for homes where preserving the original structure is crucial.
A mini-duct system consists of various components, including an air handler unit, blower module, cooling coil, main supply trunk, round outlets or vents, and small-diameter flexible ducts.
You can choose between different types of mini-duct systems, including ductless mini-split systems, high-velocity systems, and central air conditioning.
High-velocity systems, in particular, are ideal for older homes, as they do not require ductwork and have a minimal visual impact on the property's interior and exterior.
Here are some key benefits of mini-duct systems:
- Energy-efficient: They use more energy to move air than central AC, but they're still more energy-efficient because they dehumidify spaces better, have less air leakage, and could offer zoned cooling.
- Improved comfort: These high-velocity systems distribute even temperatures, provide a quick cooling response, and have reduced drafts under their vents.
- Less noise: Mini-duct systems are quieter than traditional HVAC systems.
Ductless Systems
Ductless systems are a great option for retrofit air con, especially for older homes. They don't require extensive ductwork, making them easier to install.
These systems are ideal for homes without ducts or for zoning-specific areas. They're also perfect for adding climate control to new rooms or renovations. Each room or zone can have its own unit, offering personalized comfort without compromising the home's aesthetics.
Ductless systems use two main components: an outdoor compressor/condenser and an indoor air handler. They're smaller than traditional central air systems and don't require extensive ductwork to distribute the chilled air.
Some popular ductless system brands include Bryant air conditioning and Mitsubishi ductless air conditioning systems. These systems offer a host of benefits, including affordability, space savings, comfort, security, flexibility, and energy savings.
Here are some key advantages of ductless systems:
- Affordability: Installing traditional central HVAC ducting can be a massive, cost-prohibitive undertaking in older homes.
- Space savings: With ductless systems, you'll never lose interior home or storage space to an air handler or ductwork.
- Comfort: Ductless systems offer better temperature control than both window units and central air, courtesy of hand-held remote controls that allow you to dial-in different temperatures and times for each unit and room.
- Energy savings: Unlike traditional ducted systems, which can lose 25% of efficiency via leaks, poor insulation, or improper installation, ductless systems offer substantial energy and monetary savings.
Ductless Home Heating Options
Ductless home heating options offer a convenient and efficient way to warm up your space without the need for traditional ductwork. Ductless mini-split systems are a great choice for older homes, as they have a minimal visual impact and allow for personalized comfort in each room or zone.
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These systems are ideal for homes where preserving the original structure is crucial, as they don't require extensive ductwork installation. High-velocity systems, on the other hand, use small, flexible ducts that can be threaded through existing walls and spaces.
Here are the key differences between ductless mini-split systems and high-velocity systems:
Ductless mini-split systems are a great option for homes where aesthetics are a top priority, while high-velocity systems are better suited for homes where preserving the original structure is crucial.
Ductless Systems: A Superior Choice for Your Home
Ductless systems are a superior choice for your home. They offer a host of benefits over traditional ducted systems and window units.
One of the main advantages of ductless systems is their affordability. Installing traditional central HVAC ducting can be a massive, cost-prohibitive undertaking in older homes. This is especially true when compared to the cost of installing a ductless system.
Ductless systems also offer space savings. With no need for air handlers or ductwork, you'll never lose interior home or storage space to these components. This is a major plus for homeowners who value their living space.
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These systems provide better temperature control than both window units and central air. This is thanks to hand-held remote controls that allow you to dial-in different temperatures and times for each unit and room.
Ductless systems offer improved security, as you no longer have to worry about open window security issues or the need for off-season moving and storage.
They also offer flexibility, allowing you to add as many as four interior units to a single system. This makes them ideal for homes with multiple levels or areas that need separate climate control.
In terms of energy efficiency, ductless systems are a clear winner. They use more energy to move air than central AC, but they're still more energy-efficient because they dehumidify spaces better, have less air leakage, and offer zoned cooling.
Here are some of the key advantages of mini-duct air conditioning:
- Energy-efficient: They use more energy to move air than central AC, but they're still more energy-efficient because they dehumidify spaces better, have less air leakage, and could offer zoned cooling.
- Improved comfort: These high-velocity systems distribute even temperatures, provide a quick cooling response, and have reduced drafts under their vents.
- Less noise: Mini-duct systems are quieter than traditional HVAC systems.
Handler
The air handler is a crucial part of a high velocity system, and it's designed to be compact and space-efficient.
It can be installed in various locations, including attics, basements, crawl spaces, or even closets, making it a great option for homes with limited space.
The air handler's size and weight are important considerations, as it needs to be placed in a space that can support its weight and has proper ventilation.
To confirm that a closet space is suitable for the air handler, an HVAC professional will check that it has proper ventilation, is close to electrical connections, and has a condensate drain.
Here are some factors to consider when choosing a location for your air handler:
- Available space for the air handler
- Existing insulation levels
- Home’s overall energy efficiency
- Structural limitations for duct routing
Assessment and Testing
A professional evaluation is the first step in upgrading air conditioning. This is where HVAC experts evaluate your home's layout and existing setup to recommend the best approach to retrofit air conditioning, ensuring it meets your cooling needs.
The assessment is crucial in determining the right size and type of air conditioning system for your home. It's not just about throwing in a new system, but about making sure it's tailored to your specific needs.
Technicians test the system after installation to ensure it functions efficiently and meets your cooling needs. This is done by checking components like the compressor, blower, thermostat, refrigerant levels, and ductwork for optimal performance.
Post Testing

Post Testing is a crucial step in ensuring your system is working as it should. Technicians test the system after installation to guarantee efficient performance and meet your cooling needs.
They check components like the compressor, blower, thermostat, refrigerant levels, and ductwork for optimal performance. Any adjustments are made to maximize comfort and energy efficiency.
A thorough post-testing process helps identify and resolve any issues early on, preventing potential problems down the line. This saves you time, money, and hassle in the long run.
Here's a breakdown of the key components technicians check during post-testing:
- Compressor: Ensures proper refrigerant flow and pressure.
- Blower: Verifies adequate airflow and distribution.
- Thermostat: Confirms accurate temperature control.
- Refrigerant levels: Checks for proper refrigerant levels and top-ups.
- Ductwork: Inspects for proper sizing, insulation, and sealing.
Initial Assessment
A professional evaluation is the first step in upgrading air conditioning, and it involves a thorough evaluation of your home's layout and existing setup.
HVAC experts will assess your home's layout to recommend the best approach to retrofit air conditioning. This ensures that the chosen system can effectively meet your cooling needs.
A professional assessment by an experienced HVAC contractor is essential to determine the most suitable air conditioning solution for your home.
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Frequently Asked Questions
Can you retrofit air conditioning to a car?
Retrofitting air conditioning to a car can be a lengthy and expensive process, potentially taking up to two days of work. However, many cars already have the necessary wiring loom installed, making the process simpler for later retrofitting.
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