Central AC Installation and Replacement in Medford, NY
Long Island summers test every home cooling system to its limits. When your air conditioner struggles to keep up, cycles on and off constantly, or simply stops working after years of faithful service, it may be time for a professional replacement. An aging or undersized system does more than leave you uncomfortable — it drives up your energy bills and puts unnecessary strain on your home's electrical system.
Central Air Systems has been installing and replacing central air conditioning systems across Long Island for 37 years. As Long Island's first Lennox Premier Dealer and a Bosch Platinum Pro and Mitsubishi Electric Diamond Dealer, we bring factory-trained expertise and access to top-tier equipment to every installation. Our NATE Certified technicians handle your project from the initial load calculation through final commissioning, so your new system runs at peak performance from day one.
Our AC Installation Process
Getting a new central air conditioning system involves more than swapping out old equipment. We follow a thorough process to make sure every installation delivers the comfort and efficiency your home deserves.
Our process starts with a visit to your home. A NATE Certified technician evaluates your existing ductwork, measures your living space, and performs a Manual J load calculation. This assessment accounts for your home's insulation, window placement, square footage, and layout so we can recommend the right system size. An oversized or undersized unit wastes energy and shortens equipment life, so getting this step right matters.
Based on the assessment, we present options from Lennox, Bosch, and Mitsubishi Electric tailored to your home and budget. We walk you through efficiency ratings, features, and warranty coverage so you can make a confident decision. Whether you choose a high-efficiency Lennox Dave Lennox Signature Collection unit or another model from our lineup, we explain exactly what you are getting and why it fits your home.
On installation day, our crew removes your old system and prepares the site for new equipment. We inspect your ductwork for leaks, damage, or restrictions and address any issues before the new system goes in. Proper preparation prevents airflow problems and helps your new air conditioner reach its rated efficiency from the start.
Our technicians install your new condenser, evaporator coil, and any supporting components according to manufacturer specifications. Every refrigerant line is properly brazed and pressure-tested, electrical connections are secured, and the condensate drain is routed correctly. We follow all local code requirements and manufacturer guidelines throughout the process.
After installation, we run a full performance test — checking refrigerant charge, airflow across the evaporator, thermostat calibration, and overall system operation. Once everything checks out, we walk you through your new system's features, filter location, thermostat operation, and maintenance schedule. We register your warranty and answer any questions before we leave.
A properly installed air conditioning system provides years of reliable comfort. Our goal is to get every detail right so you can enjoy cool, consistent temperatures throughout your home without worrying about callbacks or performance issues.
How Do You Know It Is Time for a New AC System?
Even well-maintained air conditioners reach a point where replacement makes more sense than another repair. Here are the most common signs Long Island homeowners notice when their system is nearing the end of its service life.
If any of these sound familiar, contact our team for a free in-home assessment. We will help you understand your options and find the right solution for your home and budget.
Premium AC Brands Installed by
Factory-Trained Professionals
As a multi-brand dealer with Lennox Premier, Bosch Platinum Pro, and Mitsubishi Electric Diamond status, Central Air Systems gives you access to some of the most reliable and efficient air conditioning equipment on the market. Every installation is backed by factory training and manufacturer support.
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.
Central AC Replacement
Whole-home central air conditioning by tonnage
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2-Ton AC
Cools approximately 1,000–1,300 sq ft
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2.5-Ton AC
Cools approximately 1,300–1,600 sq ft
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3-Ton AC
Cools approximately 1,600–1,900 sq ft
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3.5-Ton AC
Cools approximately 1,900–2,200 sq ft
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4-Ton AC
Cools approximately 2,200–2,600 sq ft
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5-Ton AC
Cools approximately 2,600–3,200 sq ft
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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.
Air Handler Replacement
Indoor blower / coil cabinets paired with AC or heat pump
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2-Ton Air Handler
Pairs with a 2-ton AC or heat pump
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2.5-Ton Air Handler
Pairs with a 2.5-ton AC or heat pump
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3-Ton Air Handler
Pairs with a 3-ton AC or heat pump
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3.5-Ton Air Handler
Pairs with a 3.5-ton AC or heat pump
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4-Ton Air Handler
Pairs with a 4-ton AC or heat pump
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5-Ton Air Handler
Pairs with a 5-ton AC or heat pump
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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 carry equipment from three industry-leading manufacturers, each offering distinct advantages for Long Island homeowners looking for a new central air conditioning system.
Lennox
As Long Island's first Lennox Premier Dealer, we offer the full Lennox lineup including the Dave Lennox Signature Collection. Lennox systems are engineered for quiet operation and exceptional energy efficiency, with select models achieving up to 28 SEER2 ratings. The Signature Collection features precise comfort technology that maintains temperatures within half a degree of your thermostat setting, keeping your home consistently comfortable even during the hottest stretches of summer.
Bosch
Our Bosch Platinum Pro status reflects advanced training on Bosch's inverter-driven air conditioning systems. Bosch units use variable-speed compressor technology to adjust cooling output in real time, reducing energy waste and maintaining steady indoor temperatures. These systems operate quietly and pair well with homes that need flexible, efficient cooling without the footprint of a traditional two-stage unit.
Mitsubishi Electric
As a Mitsubishi Electric Diamond Dealer, we install Mitsubishi's ducted and ductless cooling solutions for homes that need targeted comfort control. Mitsubishi systems excel in zoned applications and homes where traditional ductwork is limited or absent. Their inverter-driven compressors deliver precise temperature control with minimal energy consumption.
Central Air Systems has earned the Lennox Centurion Award and the Lennox Partner of the Year Award — recognitions given to the top-performing dealers in North America for exceptional customer service, installation quality, and brand commitment.
What Makes Us Different
37 Years of Experience
We have been installing central air conditioning systems across Long Island since 1989, building a reputation for quality workmanship and lasting results.
NATE Certified Technicians
Every technician on our installation team holds NATE certification, the industry's most respected credential for HVAC professionals.
Lennox Premier Dealer
We are Long Island's first Lennox Premier Dealer, reflecting our commitment to superior installation standards and ongoing factory training.
Flexible Financing
0% interest financing for 60 months through Service Finance makes a new AC system accessible without a large upfront payment.
Upfront Pricing
We provide a detailed written proposal before any work begins so you know exactly what your installation costs with no surprises.
Local to Medford
Our home base at 22A Scouting Blvd in Medford means fast response times and a team that understands Long Island homes and climate.
Finance Your New Central AC System
A new air conditioning system is a significant investment, and we want to make it manageable. Through our partnership with Service Finance, qualified homeowners can take advantage of 0% interest financing for 60 months. That means you can enjoy a brand-new, high-efficiency AC system now and spread the cost over five years with no interest charges.
Applying is straightforward. Your Central Air Systems comfort advisor can walk you through the application during your in-home consultation, and approvals are typically fast. Multiple plan options are available if you prefer a different term or payment structure.
AC Maintenance Plans
Protecting your new investment starts with regular professional maintenance. Our maintenance plans include annual tune-ups, priority scheduling, and discounts on repairs — keeping your system running efficiently and helping preserve your manufacturer warranty coverage.
Long Island's coastal humidity and seasonal temperature swings put extra demand on your cooling equipment. A maintenance plan ensures your system gets the attention it needs before small issues turn into expensive repairs, and it keeps your system operating at peak efficiency throughout its lifespan.
Our installation team works out of our Medford headquarters, serving homeowners throughout Suffolk County and the surrounding areas. Whether you are in a waterfront home in the Hamptons or a neighborhood in central Long Island, we bring the same level of precision and care to every project.
Long Island's mix of older homes, new construction, and coastal properties means every installation presents unique considerations. Our technicians understand the local building stock and climate challenges, allowing us to recommend and install the right system for your specific situation.
Frequently Asked Questions
Most residential central AC installations are completed in one day. If your project involves ductwork modifications, additional electrical work, or a complex system layout, it may extend into a second day. Your comfort advisor will provide a timeline during your consultation so you know what to expect.
The right system size depends on your home's square footage, insulation levels, window orientation, ceiling height, and other factors. Our technicians perform a Manual J load calculation during the in-home assessment to determine the correct capacity. Installing the wrong size leads to comfort problems and higher energy bills.
Modern high-efficiency systems with SEER2 ratings of 16 or higher can significantly reduce your cooling costs compared to older units rated at 10 or below. The exact savings depend on your current system's condition and your usage patterns, but many homeowners see a noticeable drop in their summer electric bills after upgrading.
Yes. Through our partnership with Service Finance, we offer 0% interest financing for 60 months to qualified homeowners. Additional financing terms are available, and your comfort advisor can help you explore options during your consultation.
We are authorized dealers for Lennox, Bosch, and Mitsubishi Electric. As Long Island's first Lennox Premier Dealer, a Bosch Platinum Pro dealer, and a Mitsubishi Electric Diamond Dealer, we have factory training and support for each brand's full product lineup.
Yes. Every installation includes complete removal and disposal of your existing equipment. We also inspect and address any issues with your existing ductwork, electrical connections, and refrigerant lines before installing the new system.
A properly installed and maintained central air conditioning system typically lasts 15 to 20 years. Regular professional maintenance through our maintenance plans helps extend equipment life and keeps your system running efficiently throughout its service years.
Warranty coverage varies by manufacturer and model. Lennox, Bosch, and Mitsubishi Electric all offer substantial manufacturer warranties on compressors and parts. We register your warranty at installation and review the coverage details with you so you understand exactly what is protected.
Let’s Get Started
Choosing a new central air conditioning system is a decision that affects your home's comfort for years to come. At Central Air Systems, we take the time to understand your home, recommend the right equipment, and install it to the highest standards. Our customers across Long Island count on us for honest advice, professional workmanship, and systems that perform reliably season after season.
With 37 years of experience, factory-trained NATE Certified technicians, and partnerships with Lennox, Bosch, and Mitsubishi Electric, we have the expertise and resources to handle any residential AC installation. We stand behind our work and are here to support you long after the installation is complete.
37 Years of Trusted Service — Serving Long Island homeowners with reliable AC installations since 1989.
NATE Certified Technicians — Our team holds the HVAC industry's highest professional certification.
Premier Dealer Status — Lennox Premier, Bosch Platinum Pro, and Mitsubishi Diamond authorized dealer.
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.
