Why Ductless Systems Are Ideal Air Conditioning For Old Houses

image of a house without ductwork depicting cooling options for older homes

Most oil-heated homes use hydronic heating systems and lack HVAC ductwork. As a result, many homeowners have traditionally relied on window air conditioners for summer cooling instead of central air systems. While this was once a practical solution, modern ductless air conditioning systems now offer a more efficient and effective alternative. Homeowners seeking air conditioning for older houses should consider upgrading from window units to a ductless AC system.

This McAllister Energy article examines several drawbacks of window air conditioning units and explains why a ductless system is a much better choice for air conditioning for old houses.

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Air Conditioning for Older Homes: Why Window AC Units Fall Short as Cooling Solutions

Below, we explore several disadvantages associated with using a window air conditioning unit.

1. Window Air Conditioners Take Up Significant Space

window AC unit

Central air conditioning systems use separate indoor and outdoor components that work together to deliver cooling. Window air conditioners, by contrast, house these components within a single unit, making them relatively large and cumbersome. 

Despite decades of development, their size has remained largely unchanged. They typically extend noticeably beyond the exterior wall, detracting from a home’s appearance. Beyond aesthetics, this can also affect property value by diminishing curb appeal.

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2. Window Air Conditioners Have High Operating Costs

Keep in mind that air conditioners use a significant amount of electricity. For this reason, it is important to look beyond the purchase price when comparing cooling systems. You should also consider the long-term cost of operating the equipment. 

Unfortunately, window air conditioners are often costly to run because they are less energy efficient than many modern alternatives. Compared to other cooling options, they typically consume more electricity relative to their cooling capacity.

3. Window Air Conditioners Can Be Noisy

kid covering ears with fingers depicting noisy window AC

Window air conditioners house all of their components within a single unit, making operating sounds much more noticeable during each cooling cycle. This can be especially disruptive in bedrooms, where clicks, vibrations, and other noises may interfere with sleep. While the room may stay cool, comfort can suffer if noise levels are excessive. In many cases, the sound becomes more noticeable as the unit ages, prompting homeowners to consider a quieter cooling alternative.

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4. Window Air Conditioning Units Provide Limited Cooling Performance

Despite their size, window air conditioners offer relatively limited cooling power. You could purchase one of the largest window AC units available and still find it inadequate for cooling a large room effectively. These systems are generally suited for small to medium-sized areas. Larger spaces often require multiple window units to achieve adequate comfort levels.

5. Window Cooling Systems Can Reduce Indoor Air Quality

Window air conditioners often develop gaps around the unit, allowing unfiltered outdoor air to enter the home. This air may carry pollutants that can trigger allergies and respiratory irritation. Some window AC units also provide limited filtration, allowing allergens to circulate indoors. In addition, moisture buildup inside the unit can encourage the growth of mold and bacteria, further impacting indoor air quality.

Advantages of Choosing a Ductless Air Conditioning System

ADVANTAGES written on torn yellow paper depicting Choosing a Ductless Air Conditioning System

Now that we have examined the drawbacks of window air conditioners, let’s look at one of the best alternatives and why it is worth considering.

Ductless Air Conditioning Offers Greater Energy Efficiency

A comparison of energy efficiency ratings shows that ductless air conditioners convert electricity into cooling far more effectively than window units. Although the upfront installation cost may be higher, monthly energy expenses are typically lower. 

Over time, these energy savings can add up substantially for homeowners.

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Ductless A/Cs Help Maximize Space

outdoor ductless AC unit installed beside the plants

Ductless systems have an indoor air handler and a separate outdoor unit. The indoor component features a slim, compact design that allows flexible placement throughout a room. It does not occupy a window or reduce natural sunlight. Instead, it can be mounted high on a wall where it blends easily with the existing interior layout.

Ductless Cooling Systems Operate Quietly

Most noise-producing components are housed within the outdoor unit. Thanks to the separation and the barrier provided by the exterior wall, very little sound reaches the living space. Inside, you will typically hear only a soft hum from the air handler. The noise is minimal, allowing for restful sleep at night and a quieter environment for daytime activities.

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Ductless AC Systems Allow Zoned Cooling

Ductless systems make it possible to divide a home into separate cooling zones and assign different temperature settings to each area. This improves comfort by allowing family members to enjoy temperatures that match their preferences instead of relying on a single setting for the entire house. Occupants can adjust thermostats within their zones and turn off cooling in unoccupied rooms to reduce energy use.

Ductless Air Conditioners Improve Indoor Air Quality

Without ductwork, there are no dirty ducts that can contaminate the air circulating throughout the home. Ductless systems also feature advanced multi-stage filtration that is more effective at capturing pollutants and allergens. As a result, they help create a cleaner and healthier indoor environment.

Why Ductless Air Conditioners Cost Less Than Adding Central AC to Homes Without Ductwork

ductless AC indoor unit installed in a bedroom

Many homes with hydronic heating systems were built without HVAC ductwork. Installing a forced-air central air conditioning system often requires extensive duct installation throughout the home. In some cases, walls and ceilings must be opened to accommodate the ductwork, making the project time-consuming, labor-intensive, and expensive.

However, ductless air conditioners do not require major structural modifications. They need only a small connection between the indoor and outdoor units, allowing for a quicker, more affordable, and less disruptive installation process.

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FAQs: Air Conditioning for Old Houses

question marks on colored paper depicting Air Conditioning for Old Houses FAQs

What Makes Ductless A/Cs a Good Choice for Oil-Heated Homes?

Many oil-heated homes were built without the ductwork needed for traditional forced-air HVAC systems, making central AC installations expensive and invasive. Ductless air conditioners offer an efficient, budget-friendly alternative by providing targeted cooling without extensive home modifications. Their flexible installation options and zoning features allow homeowners to cool specific areas effectively while improving overall comfort.

Can Ductless Air Conditioning Units Be Installed in Homes Without Ductwork?

Yes. Ductless air conditioners are designed specifically for homes without existing duct systems. They require only a small connection between the indoor and outdoor units, making installation simple, efficient, and minimally disruptive regardless of the home’s layout.

How Can Ductless Air Conditioners Increase Energy Efficiency in Oil-Heated Homes?

Ductless systems use advanced inverter technology and high-efficiency compressors to deliver cooling exactly where it is needed. By eliminating energy losses associated with ductwork, they can reduce electricity use and lower utility costs, making them a practical, energy-conscious option for oil-heated homes.

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How Do Ductless ACs Save Space in Oil-Heated Homes?

Ductless air conditioners feature slim, compact indoor units that help maximize living space while maintaining your home’s appearance. These can be mounted on walls or ceilings, keeping windows clear and integrating easily with a variety of interior styles. This efficient design makes them a practical choice for modern and traditional homes alike.

What Are the Long-Term Advantages of Installing Ductless Cooling Systems in Oil-Heated Homes?

Ductless air conditioners provide long-term savings, improved comfort, and better indoor air quality. In addition to reducing energy costs, they offer customizable cooling for individual rooms or zones. Over time, lower maintenance needs and efficient performance can deliver a strong return on investment while creating a more comfortable living environment.

Conclusion

Window air conditioners have several limitations that make them less practical than modern cooling solutions. With more advanced options available, homeowners can boost energy efficiency, indoor air quality, and overall comfort by upgrading their systems. Ductless air conditioners offer these benefits while remaining cost-effective and relatively easy to install. Consult a qualified HVAC professional to determine the best ductless AC system for your home.

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Reach Out to McAllister Energy for Reliable Heating Oil Delivery Services

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McAllister Energy offers flexible heating oil delivery plans and financing options, allowing customers to choose solutions that fit their household needs and budget. We provide personalized service designed to keep your heating system operating reliably throughout the winter season.

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