All Service Heating and Conditioning Inc. is a locally owned HVAC contractor headquartered at 2975 Sunrise Highway in Islip Terrace, NY 11752, serving residential and light-commercial customers throughout Suffolk County. The company was built on a straightforward premise: that homeowners on Long Island deserve honest diagnostics, transparent pricing, and technicians who know the equipment and the climate specific to this region. From oil burner tune-ups and boiler repair on the South Shore to central air installation and emergency heating callouts across central Suffolk, All Service has developed the service breadth that the county's diverse housing stock demands. With 92 Google reviews at a 4.2-star rating, the record speaks for itself.
The range of services offered by All Service Heating and Conditioning Inc. reflects the actual HVAC landscape of Suffolk County, where older oil-fired boilers, mid-century warm air furnaces, and newer heat pump systems coexist in the same neighborhoods. Heating systems, cooling systems, oil burner service and installation, aqua boiler maintenance and repair, warm air furnace service, central air installation and repair, water heater service, oil tank service, plumbing, and emergency HVAC callouts are all within the team's operational scope. The company works with the major equipment brands present across the county — Carrier, Trane, Lennox, Rheem, Ruud, York, Mitsubishi, Fujitsu, Rinnai, and Coleman — ensuring that technicians are prepared for what they find when they arrive, not surprised by it.
What separates All Service Heating and Conditioning Inc. from the alternatives available to Suffolk County homeowners is operational accountability rooted in community presence. The technicians who service homes in Islip Terrace, East Islip, Bay Shore, Brentwood, Ronkonkoma, and Holbrook work the same territory year after year, which means they develop familiarity with the equipment histories, the humidity conditions near Great South Bay and Lake Ronkonkoma, and the permit requirements specific to the Town of Islip and surrounding municipalities. That operational continuity — technicians who return, who remember, who understand the history of the systems they service — is a genuine differentiator and the foundation of the company's long-term customer relationships across Suffolk County.
Homeowners across Islip Terrace and the broader Suffolk County area choose All Service Heating and Conditioning Inc. because the company combines genuine local knowledge with the technical credentialing that residential HVAC work in New York State requires. Licensed technicians carry EPA 608 certification, the company holds current Suffolk County home improvement contractor registration, and all work is covered by liability insurance — documentation available on request before any job begins. The 92-review Google record reflects consistent performance across a wide range of service types, and the 4.2-star rating represents customers across East Islip, Bay Shore, Ronkonkoma, Brentwood, and Islip Terrace who received the kind of service they returned for.
All Service Heating and Conditioning Inc. covers the full residential HVAC spectrum for homeowners in Islip Terrace and across Suffolk County. Heating services include oil burner installation and annual tune-ups, aqua boiler repair and maintenance, warm air furnace service, and heat pump installation. Cooling services include central air installation, refrigerant recharge, condenser and air handler repair, and ductless mini-split service. The company also offers water heater service and installation, oil tank service, and plumbing — a combined service model that reduces the number of contractors a homeowner needs to manage. Emergency HVAC service is available around the clock at (631) 254-4328. Read our HVAC contractor checklist for Islip Terrace and Suffolk County
All Service Heating and Conditioning Inc. is committed to serving every customer in Islip Terrace, East Islip, Bay Shore, Ronkonkoma, Holbrook, and the surrounding Suffolk County communities with the same standard: honest diagnosis, clear communication, and work that stands up over time. Every estimate is written. Every authorization is obtained before work begins. Every technician arrives prepared with the tools and parts appropriate to the job. That operational discipline is not incidental — it is the product of years spent building a company that the HVAC contractor Islip Terrace NY market could actually rely on, rather than one that wins a first call only to fail on follow-through. Brands like Carrier, Trane, Rheem, and Lennox trust certified contractors, and All Service Heating meets that standard.
All Service Heating and Conditioning Inc. serves customers throughout Islip Terrace and Suffolk County, including East Islip, Bay Shore, West Islip, Brentwood, Oakdale, Great River, Bohemia, Ronkonkoma, and Holbrook. Whether you are located near Heckscher State Park or along the Veterans Memorial Highway corridor in central Suffolk, our HVAC team is positioned to serve you with the local knowledge and technical depth this community deserves.