Gas Furnace Installation, Repair & Maintenance Across Long Island
Trusted Gas Furnace Experts Serving Nassau & Suffolk County
When Long Island winters set in, a reliable gas furnace is the backbone of your home's comfort. All Weather Heating & Cooling has been installing, repairing, and maintaining gas furnaces for families across Nassau and Suffolk County for over 56 years. As a third-generation, family-owned business based in Copiague, we bring decades of hands-on experience to every furnace job — and we treat every home like our own.
Our factory-trained technicians work with all major brands including Carrier, Lennox, Trane, Rheem, Bryant, and more. Whether you're in Massapequa, West Islip, or anywhere across Long Island, we deliver honest assessments and reliable service you can count on.
If your furnace is more than 15–20 years old, breaking down repeatedly, or struggling to heat your home evenly, replacement is likely the smarter long-term investment. All Weather's team will walk you through your options — from standard efficiency units to high-efficiency systems with AFUE ratings above 95% — and help you choose the right size for your home in Babylon, Lindenhurst, Bay Shore, or Amityville.
Every installation includes a thorough home assessment to ensure proper sizing and efficient operation. We handle all permits and post-installation testing, and we back every installation with our workmanship guarantee. With available rebates up to $4,500 and flexible financing options, upgrading your heating system is more affordable than ever.
Choosing the
Gas Furnace Installation & Replacement on Long Island
The most common source is natural gas. Your local utility company supplies the fuel delivered to your home through an underground gas line. The price of natural gas is relatively stable, so you don’t have to worry about cost fluctuations. Plus, you never need to worry about storage.
If you have access to a natural gas line, we strongly recommend a gas furnace. These furnaces have proven their value over the years for providing steady comfort on the coldest of days.
Oil furnaces are a popular alternative in the United States, particularly in parts of the Northeast that do not have easy access to natural gas. These types of furnaces last longer than a gas furnace but do not operate as efficiently. Oil prices fluctuate more than natural gas prices, making it harder to gauge your monthly expenses. Plus, you will need a storage tank for the oil.

Electric furnaces tend to last longer than gas furnaces and cost less to install. On the other hand, they are more expensive to operate and take longer to heat your home. Anyone living in a cold climate would enjoy more comfort with a gas or oil furnace.
Furnaces run at different speeds. The operating speed you choose will impact your comfort, budget, and indoor air quality (IAQ).
Single-stage furnaces have just two settings, on or off. Your furnace switches on and continues to run to reach the desired temperature. Once it reaches the temperature, the furnace turns off. Single-stage furnaces are the most affordable models and easiest to install. But they are the least efficient and tend to create hot and cold spots in larger homes.
Two-stage furnaces run at full-speed and half-speed. This allows your furnace to heat your home more evenly, producing a more consistent temperature from room to room. In addition to producing better heating, the half-speed setting is much quieter.
Variable speed furnaces are the gold standard of the heating world. These models adjust their speeds to provide precise comfort. They run longer at slower speeds, improving efficiencies while lowering your energy bills. Because they do not frequently cycle on and off, these systems tend to have fewer breakdowns.
Variable speed furnaces are much more adept in maintaining your indoor air quality, catching harmful particles, and eliminating excess moisture that causes mold growth. Larger homes benefit tremendously from variable speed furnaces.
Choosing the Right Furnace Speed
Choosing an Efficient Furnace
The AFUE (annual fuel utilization efficiency) rating on your furnace indicates how much energy it converts. An energy-efficient furnace with an AFUE rating of 95 can convert 95 percent of the energy it consumes into heat.
The higher the AFUE rating, the more money you save on monthly utility bills. Energy-efficient furnaces emit fewer greenhouse gases and make less noise when they operate. If you want to reduce your home’s carbon footprint, the perfect place to start is with your heating and cooling equipment!
How Much Money can
a New Furnace Save You?
Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Just enter your current unit’s AFUE value and compare it to a newer, more efficient system.
Furnace Installation or Replacement
Don’t invest in a quality HVAC system and then hire a substandard contractor to install it. You will never enjoy the full benefits of a system installed incorrectly.
At All Weather Heating & Cooling, we specialize in installing equipment the right way. We take our time to ensure everything is measured correctly. Our team will also conduct a thorough energy audit of your home to find additional ways to lower your energy use.
Be sure to ask about our convenient financing options designed to make it easy for you to create your dream home.
Gas Furnace Repair Across Nassau & Suffolk County
A furnace breakdown in the middle of a Long Island cold snap can't wait. Our technicians respond quickly to homes across Seaford, Bellmore, Wantagh, and West Babylon with fully stocked trucks ready to diagnose and fix most problems on the first visit. We repair all makes and models — no matter who originally installed your system.
Warning signs your furnace needs professional attention include unusual noises (banging, squealing, or rattling), uneven heat throughout your home, a yellow pilot light instead of blue, unexplained spikes in your heating bills, or the system cycling on and off frequently. Don't wait — call us at 631-823-1648 before a small problem becomes a major repair.
Annual Gas Furnace Maintenance — Long Island's Best Defense Against Winter Breakdowns
The best way to avoid a mid-winter furnace failure is a professional annual tune-up before heating season begins. Our maintenance service covers inspection of the heat exchanger, burners, and flue; testing of safety controls and carbon monoxide detection; cleaning the combustion chamber; checking gas pressure and igniter performance; and replacing or cleaning the air filter. Regular maintenance extends your system's lifespan and keeps it running efficiently across Massapequa Park, Merrick, Islip, and all of Long Island.
Ask about our maintenance plans for priority scheduling, discounted repairs, and regular check-ups throughout the year.
Frequently Asked Questions: Gas Furnaces on Long Island
How long does a gas furnace last on Long Island?
A well-maintained gas furnace typically lasts 15–20 years. Long Island's cold, damp winters can stress systems that aren't serviced regularly. Annual tune-ups by a qualified technician are the single best thing you can do to maximize your furnace's lifespan and avoid premature replacement.
What AFUE rating should I look for in a new furnace?
We generally recommend a minimum 80% AFUE for standard efficiency and 95%+ AFUE for high-efficiency systems. High-efficiency furnaces cost more upfront but deliver significant savings on heating bills over time — especially on Long Island where heating season runs from October through April. Available rebates can offset a large portion of the upgrade cost.
Is it safe to run a gas furnace with a cracked heat exchanger?
No — a cracked heat exchanger is a serious safety hazard that can allow carbon monoxide to enter your living space. If our technicians detect a cracked heat exchanger during a service call or tune-up, we'll explain your options clearly and honestly. In many cases, replacement is the safest and most cost-effective solution.
How do I know if my furnace needs repair or replacement?
If your furnace is under 10 years old and the repair cost is less than half the price of a new system, repair usually makes sense. If it's older than 15 years, requires frequent repairs, or uses outdated components, replacement is typically the better investment. We give every homeowner an honest assessment — never a pressure pitch.
Does All Weather service furnaces they didn't install?
Absolutely. We service and repair all makes and models of gas furnaces, regardless of who installed them. From Babylon to Farmingdale to West Islip, our technicians are equipped to diagnose and fix virtually any furnace brand or system configuration. Call 631-823-1648 to schedule service today.
Ready to Schedule Furnace Service? Contact All Weather Today
All Weather Heating & Cooling has been Long Island's trusted furnace team for over 56 years. Whether you need a new installation, an urgent repair, or an annual tune-up, we're here to help. Call us at 631-823-1648 or request service online to schedule your appointment. Proudly serving Nassau and Suffolk County from our Copiague, NY facility.