heating and cooling contractor New York City

When your air conditioner fails on a scorching New York City day, you need fast, skilled help. Alexandria Heating & Air Conditioning provides complete AC repair, maintenance, and installation for all types of units—central air, ductless mini-splits, window units, and portable ACs. Our NATE-certified technicians diagnose the root cause quickly, whether it's a refrigerant leak, frozen coil, or failed compressor. We also specialize in casement window AC installations, top-mounted and lower-mounted brackets, plexiglass fittings, and drip cushions to secure your unit safely.

Beyond repairs, we are your local experts in AC sales and installation. We help you choose the right size and efficiency rating for your home or business, saving you money on monthly utility bills. Our preventive maintenance plans include a thorough 22-point inspection, cleaning of coils and filters, and system performance tuning. Plus, for New York City properties, we offer complete air conditioner winter storage and HVAC winterization to protect your investment during the cold months. With Alexandria, you get honest advice, upfront pricing, and a guarantee that your cooling system will perform efficiently all summer.

Winter in New York City demands a heating system you can rely on. Alexandria Heating & Air Conditioning offers full heating repair, maintenance, and installation for furnaces, boilers, heat pumps, and PTAC heaters. Our technicians understand the unique challenges of older New York City buildings and modern energy-efficient systems alike. If your furnace is blowing cold air, making strange noises, or short-cycling, we'll identify the issue—whether a faulty ignitor, pilot light problem, or clogged burner—and have your home warm again fast.

Regular heating maintenance is the best way to avoid emergency breakdowns on the coldest night of the year. Our tune-up service includes cleaning burners, checking heat exchangers for cracks, testing safety controls, and adjusting blower components to maximize efficiency. Since heating can account for nearly half your home's energy bill, we also recommend high-efficiency furnace replacements and smart thermostat upgrades. We serve all of New York City with emergency heating repair, honest diagnostics, and flat-rate pricing. Call us for a free estimate and join the thousands of New York City families who trust Alexandria for safe, reliable winter warmth.

Alexandria Heating & Air Conditioning is New York City's leading specialist in PTAC (Packaged Terminal Air Conditioner) units and through-the-wall AC systems. We handle it all—repair, installation, sales, and replacement for hotels, apartments, condos, and commercial spaces. Our team is factory-trained on all major PTAC brands and can quickly troubleshoot common issues like motor failure, control board errors, compressor problems, or valve blockages. We also provide PTAC sleeve installation, wall sleeve replacement, and proper drainage solutions to prevent water leaks and mold growth.

If your PTAC unit is over seven years old or constantly needs repairs, we offer cost-effective replacement options that are more energy-efficient and quieter. We carry a range of new and used PTAC units and can match the exact dimensions for your through-the-wall sleeve. Our services cover Queens, Manhattan, Brooklyn, Bronx, Staten Island, and Bronxville. Whether you need a single unit replaced or a whole building retrofit, we provide volume pricing and rapid installation. For property managers and building owners in New York City, we are the go-to PTAC resource—just call (516) 834-1772 for a free estimate.