Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateHVAC Company in Syosset, NY
HVAC work in Syosset comes down to this: older homes, tight attics, and summers that push aging equipment harder than owners expect. Dalton Heating & Air handles AC repair, heat pump installation, and furnace repair across Syosset with written pricing before any work starts and a full-year written guarantee on every repair. If your system is struggling, call (516) 559-4840 and a live person answers 24/7.
Why Syosset Homes Are Different
Syosset’s housing stock runs heavily to colonials and split-levels built between 1950 and 1980. Many of those homes have original ductwork sized for heating only. When central air gets retrofitted, the ductwork often can’t move enough air for cooling, so we see a lot of zoning work and high-velocity systems here. In the Birchwood section, low-pitch roofs and shallow attics make running new ducts difficult, which pushes many homeowners toward ductless mini-splits.
Summers are hot and humid, and the marine influence keeps humidity high even on milder days. That makes dehumidification a real part of comfort in Syosset, not an afterthought. Older systems often freeze up at the evaporator coil when they can’t pull moisture out fast enough. Winters test furnaces that have been cycling for decades. The equipment here is rarely new, and the houses it serves were built around different assumptions about airflow.
We also see a pattern in Syosset: systems installed by whoever the previous owner hired, with mixed ductwork, mismatched equipment, and no service history. Our technicians sort through it, explain what’s actually there, and give you a written price before touching anything.
Styles & brands we work with
Our Main Syosset Services
The three jobs Syosset homeowners call us about most are AC repair in summer, heat pump installation when existing equipment gives out, and furnace repair once the cold sets in. Each has its own page with local detail, and a real person answers the phone 24/7.
AC Repair in Syosset
Syosset summers are humid, and older equipment works hard to keep up. Frozen coils, failed capacitors, and low refrigerant are the most common calls we get. If your air conditioner is short-cycling or blowing warm, we diagnose the issue, put the repair price in writing, and stand behind the work for a full year. The repair is guaranteed in writing; if it fails in that time, we return at no charge. Full detail: AC Repair in Syosset.
Heat Pump Installation in Syosset
For Syosset homes without existing ductwork, a heat pump is often the cleanest path to year-round comfort. We size the system to the house, not to a guess, and install ducted or ductless configurations depending on layout. In Birchwood and other sections with shallow attics, ductless is frequently the better fit. We handle a range of brands, so you’re not locked into one manufacturer’s equipment. Full detail: Heat Pump Installation in Syosset.
Furnace Repair in Syosset
Winters in Syosset demand a furnace that actually fires. We see failed ignitors, clogged burners, and cracked heat exchangers in the older equipment around here. Every furnace repair gets a written diagnosis, a written price before work starts, and a full-year written guarantee. If the repair fails within that year, the second visit is free. Full detail: Furnace Repair in Syosset.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Syosset
We service Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard equipment across Syosset. Our technicians are factory-trained on all nine brands, so we’re not learning on your system. For more, see our brands.
See the difference
Before
After
Before
After
Before
AfterPricing for HVAC Company in Syosset, NY
| Service | Typical range in Syosset |
|---|---|
| AC repair | $150 – $650 |
| Furnace repair | $150 – $700 |
| AC installation | $3,500 – $7,500 |
| Tune-up | $80 – $200 |
What pushes a Syosset job toward the top of a range? Older equipment, difficult attic access, and repairs that require matching parts for a discontinued system. Wherever your job lands, you get the price in writing before any work starts. No surprises at the door.
Neighborhoods We Serve in Syosset
We cover all of Syosset, including Birchwood, Locust Grove, North Syosset, and the neighborhoods around the LIRR station. Response time is typically same-day for emergency calls depending on call volume.
- Birchwood
- Locust Grove
- North Syosset
- Syosset Park area
Service Area – Cities Near Syosset
Dalton Heating & Air serves Syosset and the surrounding Long Island communities. Homeowners in Plainview, NY, Hicksville, NY, Bethpage, NY, and Levittown, NY can reach us at the same number: (516) 559-4840.
Serving Syosset, NY - Our Local Coverage Area
We’re based in the Syosset area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Company in Syosset
For emergency AC or furnace breakdowns, we aim for same-day dispatch across Syosset. Call (516) 559-4840 and a live person takes your call 24/7. You’ll get a window before we leave, not a four-hour maybe.
Some installations require town permits depending on scope. We handle the paperwork on our end and let you know exactly what’s needed for your job. Repairs and replacements of like-for-like equipment typically do not require a permit, but we’ll confirm for your specific situation.
Yes. We serve every section of Syosset without travel upcharges. Whether you’re near the LIRR station, in Birchwood, or on the northern edge of town, you get the same written pricing and the same full-year guarantee on repairs. Call (516) 559-4840 for a free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Syosset Customers Say
"Installed a heat pump to replace an old oil furnace. Three clear quotes and the install crew was tidy."
- Cheryl B."Solid install. Permit inspection took a few extra days, but they handled it."
- Paul L."No pressure to upgrade. He said the old unit had a few years left and fixed the actual problem."
- Jimmy V.