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A FIVE-STAR AIR CONDITIONING COMPANY

★★★★★

Authorized Daikin Dealer  |  Free Estimates

AC Installation &
Replacement Services
on Long Island, NY

New central AC system or full replacement of an aging unit — All Seasons handles everything from load calculation through startup. Family-owned for 58 years, authorized Daikin dealer, financing available.

Free Estimates
Financing Available
Licensed & Insured
58 Years Experience
Best Time to Replace Your AC — Expert Advice
Is It Time?

Signs Your Long Island Home Needs a New AC System

Most central air conditioning systems last 12–15 years. If your unit is approaching or past that mark, the math often tips toward replacement — especially when you factor in rising repair costs, energy inefficiency, and new high-SEER equipment that can cut your cooling bills significantly.

Here are the clearest signs it's time to call All Seasons for a replacement estimate rather than another repair:

System is 12+ Years Old

Age is the single biggest factor. Systems older than 12 years are nearing end of life — and replacement parts are increasingly hard to find.

Energy Bills Keep Climbing

Older systems lose efficiency every year. A new Daikin system with a 20+ SEER rating can reduce cooling costs by 30–50% compared to a system rated 10 SEER.

Frequent & Costly Repairs

If you're calling for repairs every season, apply the "50% rule" — if the repair cost exceeds 50% of a new system's price, replacement is the smarter investment.

Uneven Cooling or Humidity Issues

Hot spots, humidity problems, and inconsistent temperatures are signs of a system that can no longer keep up — a properly sized new unit eliminates these.

58
Years Installing AC on Long IslandWe've installed thousands of systems across Nassau and Suffolk Counties since 1968.
20+
SEER Rating on New Daikin SystemsCompared to 10 SEER on older units — that's up to 50% in energy savings on your cooling bills.
0%
Financing AvailableQualifying Daikin installations may be eligible for 0% financing. Ask us when you request your estimate.
Equipment We Install

AC Systems We Install on Long Island

We size, supply, and install the right system for your home — from whole-house central AC to room-by-room ductless solutions. All equipment is Daikin-sourced and factory-warrantied.

Central Air Conditioning

Whole-home central AC using your existing ductwork. We size the system precisely to your home's square footage and insulation — the most common and cost-effective solution for Long Island homes with existing ducts.

Ductless Mini Split Systems

No ductwork? No problem. Daikin mini splits deliver precise zone-by-zone cooling with no major construction. Perfect for older Long Island homes, additions, sunrooms, and finished basements.

Heat Pump Systems

A single Daikin heat pump handles both cooling in summer and heating in winter — with cold-climate models that operate efficiently down to -13°F. An excellent year-round solution for Long Island homes.

Multi-Zone Systems

One outdoor unit, multiple indoor units — each independently controlled. Ideal for two-story homes, multi-family properties, and any situation where different rooms need different temperatures.

AC Replacement

Replacing an aging system is our most common installation. We remove the old unit, properly dispose of refrigerant, and install a correctly sized new system — typically completed in one day.

Financing & Rebates

Qualifying Daikin systems may be eligible for 0% financing and manufacturer rebates. We walk you through all available options during your free estimate — no pressure, just the facts.

Our Process

How We Install Your New AC System

From your first call to the moment we switch it on — here's exactly what to expect when All Seasons installs your new air conditioning system.

1
Free In-Home Estimate

We visit your home, measure your space, assess your ductwork, and recommend the right system. You get a full written quote — no pressure, no obligation.

2
System Selection & Scheduling

We help you choose the right Daikin model for your budget and efficiency goals. We handle permits and schedule your install — usually within days.

3
Professional Installation

Our certified technicians install your new system, remove and properly dispose of the old unit, complete all electrical and refrigerant work, and test everything thoroughly.

4
Startup & Walkthrough

We run the system through all modes, confirm performance, register your warranty, and walk you through your new thermostat and controls before we leave.

Our Equipment Brand

We Install Daikin — The World's #1 HVAC Brand

As an authorized Daikin Pro and Elite dealer, All Seasons supplies and installs the full Daikin lineup — from high-efficiency central AC systems to quiet ductless units. Every installation comes with full manufacturer warranty coverage, factory-trained installation, and access to genuine Daikin parts.

Daikin's newest central AC systems achieve SEER2 ratings of 18–22+, qualifying for energy rebates and delivering real savings on Long Island electric bills — especially during peak summer months.

Daikin Pro Dealer
Daikin Elite Dealer
Factory Trained
Full Warranty
SEER2 Rated
New AC vs Old — The Real Energy Savings
Common Questions

AC Installation FAQs

How much does AC installation cost on Long Island?
Central AC installation on Long Island typically ranges from $4,000–$9,000 depending on the system size, SEER rating, and ductwork condition. Ductless mini split systems vary by the number of zones. All Seasons provides free, detailed written estimates — contact us for exact pricing for your home.
How long does AC installation take?
Most central AC replacements are completed in one day. New installations requiring ductwork modifications may take 1–2 days. We confirm the timeline during your estimate so there are no surprises.
Should I repair or replace my AC?
If your system is under 10 years old and the repair cost is less than 50% of a replacement, repair usually makes sense. If it's over 12 years old, has been repaired multiple times, or uses R-22 refrigerant (no longer manufactured), replacement is almost always the better investment.
What SEER rating should I choose?
The minimum federal standard is 14 SEER2. We recommend 16–18 SEER2 for good efficiency and 20+ SEER2 for maximum energy savings. Higher SEER units cost more upfront but often pay back the difference within 3–5 years through lower electric bills on Long Island.
Is financing available?
Yes. Qualifying Daikin installations may be eligible for 0% financing for approved customers. We'll go over all available financing and rebate options during your free estimate.

Request a Free Estimate

We respond within 1 business hour

What Customers Say

Long Island Homeowners Love Their New All Seasons AC

"All Seasons replaced our 18-year-old central AC with a new Daikin system. The difference is unbelievable — quieter, cools faster, and our electric bill dropped noticeably the first month. Installation was clean and done in one day."

Thomas & Lisa R.
Manhasset, NY

"Got three estimates for a new AC. All Seasons was competitive on price and the only company that actually measured my house and calculated the right system size. The others just guessed. That made the decision easy."

Karen M.
Syosset, NY

"Our old house had no central air — just window units. All Seasons installed a complete ductless system across four zones. Best home improvement we've done. Cool everywhere, no window units blocking the views."

Frank & Maria D.
Glen Cove, NY
Where We Install

AC Installation Across Long Island, NY

Serving Nassau and Suffolk Counties. Don't see your town? Call us — we cover all of Long Island.

Find Us

All Seasons Air Conditioning — West Babylon, NY

Serving West Babylon and all of Long Island, NY for 58 years.