Ductless Mini-Split Installation and Replacement in Medford, NY
Not every home has ductwork — and not every room needs it. Whether you are adding heating and cooling to a finished attic, a converted garage, a sunroom, or an older home that was never built for central air, a ductless mini-split system delivers targeted comfort without tearing into walls and ceilings. Mini-splits give you independent temperature control in each zone, so you only condition the spaces you actually use.
Central Air Systems has been installing ductless mini-split systems across Long Island for 37 years. As a Mitsubishi Electric Diamond Dealer, Lennox Premier Dealer, and Bosch Platinum Pro, we carry the leading brands in the ductless market and bring factory-level training to every installation. Our NATE Certified technicians design and install multi-zone and single-zone systems tailored to your home's layout, so every room stays comfortable year-round.
How We Install Your Mini-Split System
A ductless mini-split installation is less invasive than a traditional HVAC system, but it still demands careful planning and execution. We follow a structured process to make sure your system is sized correctly, positioned for optimal airflow, and installed to manufacturer standards.
We start by visiting your home to evaluate the spaces you want to condition. Our technician measures the room dimensions, checks insulation levels, notes window exposure, and performs a load calculation for each zone. This step determines how many indoor units you need, what capacity each one requires, and where to position them for the best airflow and aesthetics. Skipping this step leads to oversized systems that short-cycle or undersized units that run constantly.
Based on the evaluation, we recommend a system configuration from Mitsubishi Electric, Lennox, or Bosch. A single-zone setup might suit a standalone addition, while a multi-zone system can serve an entire floor or home with one outdoor condenser connected to multiple indoor units. We walk you through the equipment options, efficiency ratings, and features so you understand what each system offers and how it fits your situation.
Each indoor unit mounts on a wall, ceiling, or within a ceiling cassette — depending on the model and your preferences. Our technicians run the refrigerant line sets, condensate drain lines, and communication wiring through a small opening in the exterior wall, typically just three inches in diameter. We plan the routing to minimize visual impact and protect the lines from weather exposure, securing everything with a clean line cover on the exterior.
The outdoor unit needs a stable, level surface with adequate clearance for airflow and service access. We install the condenser on a mounting pad or wall bracket, connect the refrigerant lines, and wire the communication cable between the indoor and outdoor units. Every connection is pressure-tested for leaks before we charge the system with refrigerant.
Once the installation is complete, we run the system through its full range of heating and cooling modes. We verify airflow direction, check refrigerant pressures, confirm each zone responds independently, and test the remote or wall controller. Before we leave, we walk you through the controls, explain the filter cleaning schedule, and register your manufacturer warranty.
A properly planned and installed mini-split system operates quietly, heats and cools efficiently, and gives you room-by-room comfort control that central systems simply cannot match.
Is a Ductless Mini-Split Right for Your Home?
Mini-splits solve a range of comfort problems that traditional HVAC systems handle poorly or not at all. Here are the most common situations where Long Island homeowners benefit from a ductless installation.
If any of these scenarios describe your home, reach out to our team for a free consultation. We will assess your space and recommend the best ductless solution for your needs.
Long Island's Ductless
Comfort Specialists
Central Air Systems holds Diamond Dealer status with Mitsubishi Electric, Premier Dealer status with Lennox, and Platinum Pro certification from Bosch. That means factory training, priority technical support, and access to the full product lineup from each manufacturer — all backed by 37 years of hands-on installation experience.
Starting Price Ranges
Use these starting ranges to plan your project. Final pricing depends on equipment selection, the condition of your ductwork and electrical, permits, and removal of the old system. We provide every customer with a written, no-obligation quote.
Ductless Mini-Split
Single-zone to whole-home multi-zone systems
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1-Zone System
Single indoor head — perfect for an addition, finished attic, or one room
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2-Zone System
Two indoor heads from one outdoor unit
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3-Zone System
Three indoor heads — common for upper-floor bedrooms or multi-room conversions
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4-Zone System
Four indoor heads from a single condenser
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5-Zone System
Five indoor heads — whole-home ductless coverage
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Pricing shown is a general starting range for typical Long Island installations. Final pricing depends on equipment selection, ductwork condition, electrical work, permits, and removal of the old system. Contact us for a free, no-obligation quote tailored to your home.
Our Brand Partners
We install ductless mini-split systems from three manufacturers that lead the industry in inverter technology, efficiency, and reliability. Each brand brings distinct strengths depending on your project.
Mitsubishi Electric
As a Mitsubishi Electric Diamond Dealer, we carry the full Mitsubishi ductless lineup including their Hyper-Heating INVERTER (H2i) systems, which provide reliable heating performance even in sub-zero temperatures. Mitsubishi pioneered the ductless category and continues to set the standard for whisper-quiet operation, precise temperature control, and long-term reliability. Their multi-zone systems can connect up to eight indoor units to a single outdoor condenser, making them ideal for whole-home ductless solutions.
Lennox
Our Lennox Premier Dealer status gives us access to Lennox's mini-split product line, including high-efficiency models with inverter-driven compressors. Lennox mini-splits are designed for quiet performance and pair well with homes that also use Lennox central systems, providing a unified equipment platform for homeowners who want consistency across their HVAC setup.
Bosch
As Bosch Platinum Pros, we install Bosch's Climate 5000 ductless series, known for its strong efficiency ratings and value. Bosch mini-splits use inverter technology with variable-speed compressors that adapt to changing conditions, maintaining steady temperatures while keeping energy consumption low. They are a solid option for homeowners looking for reliable ductless performance at a competitive price point.
Central Air Systems has earned the Lennox Centurion Award and the Lennox Partner of the Year Award — honors given to the highest-performing dealers in North America for customer service, installation quality, and commitment to excellence.
What Makes Us Different
37 Years of Experience
We have been installing heating and cooling systems across Long Island since 1989, including ductless mini-splits since the technology first gained traction in the residential market.
NATE Certified Technicians
Our installation team holds NATE certification, the HVAC industry's most respected professional credential, ensuring every system is installed to code and manufacturer specifications.
Mitsubishi Diamond Dealer
Our Diamond Dealer status with Mitsubishi Electric reflects the highest level of factory training and sales volume in the ductless category.
Flexible Financing
0% interest financing for 60 months through Service Finance puts a new mini-split system within reach without a large upfront cost.
Upfront Pricing
We provide a detailed written proposal before any work begins, covering equipment, labor, and any modifications — no hidden charges.
Local to Medford
Operating from 22A Scouting Blvd in Medford gives us fast response times and deep familiarity with Long Island's homes and climate demands.
Finance Your New Mini-Split System
A ductless mini-split system is a smart investment in comfort and efficiency, and it does not have to strain your budget. Through our partnership with Service Finance, qualified homeowners can take advantage of 0% interest financing for 60 months. That means you can install a new system today and spread the cost over five years with no interest charges.
Your Central Air Systems comfort advisor walks you through the application during your in-home consultation. Approvals are typically fast, and additional financing terms are available if you prefer a different payment structure.
Mini-Split Maintenance Plans
A ductless system needs regular attention to perform at its best. Our maintenance plans include seasonal tune-ups, filter and coil cleaning, refrigerant checks, and priority scheduling — everything your mini-split needs to run efficiently and maintain its warranty coverage.
Long Island's coastal humidity puts extra demand on ductless systems, especially during summer. Salt air, pollen, and moisture can affect outdoor condensers and indoor air handlers over time. A maintenance plan ensures your system gets the professional care it needs before minor issues become costly repairs.
Our team works out of our Medford headquarters, serving homeowners throughout Suffolk County and beyond. Whether you are in a historic home in Southampton or a newer build in Hauppauge, we bring the same level of precision and care to every ductless installation.
Long Island's diverse housing stock — from pre-war homes without ductwork to modern open-concept builds — makes ductless mini-splits one of the most versatile comfort solutions in our lineup. Our technicians understand the unique challenges of each neighborhood and home style, and we design every system to fit the space.
Frequently Asked Questions
A single-zone mini-split installation is typically completed in one day, often in just a few hours. Multi-zone systems with three or more indoor units may take a full day or extend into a second day depending on the complexity of the line set routing and mounting locations. We provide a clear timeline during your consultation.
Yes. Modern inverter-driven mini-splits, particularly Mitsubishi Electric's Hyper-Heating models, provide effective heating performance even when outdoor temperatures drop well below freezing. These systems are designed for year-round use and perform reliably through Long Island winters.
That depends on the system and manufacturer. Mitsubishi Electric multi-zone condensers can support up to eight indoor units from a single outdoor unit. The right configuration depends on your home's layout, the size of each room, and your heating and cooling needs. We design each system based on a room-by-room load calculation.
Yes. All the mini-split systems we install are heat pumps, meaning they provide both heating and cooling from a single system. You can switch between modes with the remote or wall controller, and the system automatically adjusts output to maintain your set temperature.
Ductless indoor units are among the quietest HVAC equipment available. Most wall-mounted models operate at noise levels comparable to a whisper — around 19 to 30 decibels on low settings. Outdoor condensers are also designed for quiet operation, which is especially important in close-quarters neighborhoods.
Not necessarily. One indoor unit can condition an open-plan area that includes a living room and kitchen, for example. Separate units make sense for rooms that are closed off or have very different temperature needs. During our site evaluation, we help you determine how many zones your home requires.
Regular filter cleaning is the most important homeowner task — most indoor units have washable filters that should be cleaned every few weeks. Professional maintenance includes checking refrigerant levels, cleaning the indoor coil and blower, inspecting the outdoor unit, and verifying electrical connections. Our maintenance plans cover these services on a scheduled basis.
No. One of the biggest advantages of a ductless system is the minimal disruption during installation. The only wall penetration is a three-inch opening for the refrigerant lines, drain line, and wiring. There is no ductwork to build, no large openings to cut, and most installations are completed without significant disruption to your daily routine.
Let’s Get Started
If you have been dealing with uncomfortable rooms, rising energy bills, or a home that was never built for central air, a ductless mini-split system may be the solution you have been looking for. Central Air Systems has the experience, the training, and the brand partnerships to design a system that fits your home and solves your specific comfort challenges.
We have spent 37 years helping Long Island homeowners find the right heating and cooling solutions. From a single wall unit in a finished attic to a multi-zone system covering an entire home, we approach every project with the same attention to detail and commitment to getting it right the first time.
37 Years of Trusted Service — Installing heating and cooling systems across Long Island since 1989.
NATE Certified Technicians — Factory-trained professionals with the HVAC industry's top credential.
Mitsubishi Diamond Dealer — The highest dealer tier for the leading name in ductless technology.
0% Financing Available — 60-month interest-free financing through Service Finance for qualified homeowners.
Transparent Pricing — Detailed written proposals with no hidden fees or surprise charges.
Locally Based in Medford — Fast response and local expertise from our Suffolk County headquarters.
