Business Details
50+ Years
experience
Emergency
services
Your Trusted HVAC & Oil Delivery Partner in Medford, NY
Danisi Energy has been a family-owned and operated full-service HVAC and fuel delivery company serving Suffolk County on Long Island for over 60 years. We specialize in comprehensive heating, ventilation, and air conditioning solutions while providing reliable oil delivery services. Our commitment to 24/7 emergency support ensures customers receive immediate assistance during critical situations. With decades of experience, we maintain a reputation for handling all HVAC needs in-house without outsourcing to third-party specialists. Our team prioritizes customer satisfaction through prompt service, expert diagnostics, and transparent communication.We serve residential, commercial, and multi-family properties with tailored solutions for new construction and existing systems. Our service area includes Southampton, Port Jefferson, East Hampton, and surrounding communities. Customer testimonials consistently highlight our rapid response times, technical expertise, and dedication to resolving heating and cooling issues efficiently. We maintain partnerships with industry-leading brands to ensure quality equipment installations and replacements. Our comprehensive approach covers system maintenance, emergency repairs, and energy-efficient upgrades to meet diverse client needs.
Services
Emergency AC Repair
Heating Installation
Oil Delivery
HVAC Maintenance
Ductless Systems
Heat Pump Repair
Indoor Air Quality
Commercial HVAC
New Construction HVAC
24/7 Emergency Service
Details
- Year established: 1965
Highlights and features
- We offer 60+ years of local HVAC and oil delivery expertise
- Our team provides 24/7 emergency service with rapid response times
- We handle all HVAC work in-house without subcontractors
- We serve residential, commercial, and multi-family properties
- Our technicians maintain certifications for all major HVAC systems
What people say
Excellent service
Fixed the issue
Professional technicians
Efficient delivery
Prompt response
Services
Emergency HVAC Repair
Our certified technicians provide round-the-clock emergency repair services for heating and cooling systems. With rapid response times and fully equipped service vehicles, we resolve critical HVAC failures during extreme weather conditions. Our team handles all system types including furnaces, heat pumps, and ductless units while maintaining service guarantees for residential and commercial properties.
Oil Delivery
We offer reliable heating oil delivery services with automatic scheduling and emergency supply options. Our delivery fleet ensures timely service during peak winter months while maintaining competitive pricing. Customers receive real-time delivery tracking and priority service during severe weather events through our dedicated dispatch system.
HVAC Maintenance
Our comprehensive maintenance programs include seasonal system inspections and tune-ups for optimal performance. Technicians perform detailed equipment diagnostics, filter replacements, and efficiency checks to extend system lifespan. We offer customized maintenance plans for residential properties and commercial facilities with multiple HVAC units.
Heat Pump Services
We specialize in heat pump installation, repair, and maintenance for residential and commercial applications. Our services cover system diagnostics, refrigerant charging, and component replacements. Technicians are trained on both traditional and ductless heat pump systems to ensure proper operation in heating and cooling modes.
Indoor Air Quality
Our indoor air quality solutions include air purification systems, humidity control, and ventilation upgrades. We install HEPA filters, UV coil purifiers, and whole-house dehumidifiers to improve residential and commercial air environments. Our technicians assess existing systems to recommend customized solutions for allergy sufferers and sensitive occupants.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including emergency repairs, installations, maintenance, and ductless system services for residential and commercial properties.
Do you offer 24/7 emergency service?
Yes, our technicians are available 24 hours a day, 7 days a week for urgent heating and cooling system failures.
Which areas do you serve?
We serve Suffolk County and surrounding areas on Long Island including Medford, Southampton, Port Jefferson, and East Hampton.
Is financing available for HVAC upgrades?
Yes, we offer financing options for qualifying HVAC equipment replacements and system upgrades through approved lenders.
How does your oil delivery work?
We provide scheduled and emergency oil deliveries with real-time tracking. Our automatic delivery system ensures homes never run out of heating oil.
Reviews (7)
Gwen Pidgeon
Jun 30, 2021
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Technician Junior arrived on time, giving me a call 1/2 hour prior to arrival and arrived wearing a mask. Junior was able to answer my questions and provide information about the work. Highly satisfied with the professionalism and courtesy.
Thomas Chambers
Jun 04, 2021
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Critical:Professionalism,Value
Charged $160 for an estimated job. Then explained a $400 test was needed and still mite not be able to fix. Called an honest mechanic got it fixed for $150. This company is a total rip off.
Service:AC maintenance
Charged $160 for an estimated job. Then explained a $400 test was needed and still mite not be able to fix. Called an honest mechanic got it fixed for $150. This company is a total rip off.
Service:AC maintenance
Adriana Biasi
Jun 02, 2021
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Installed air conditioning system without filters or room to install them. Left outdoor unit wiring disconnected and said the system was ok to use. No wonder it was not cooling.
Kellie Fastrnu
May 31, 2021
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Positive:Professionalism,Responsiveness
Professional, courteous, efficient. Thank You!
Service:Install heating system
Professional, courteous, efficient. Thank You!
Service:Install heating system
Diane H.
Jul 27, 2020
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THE ABSOLUTE WORST! Home Depot jobs out their AC installations to Danisi Energy, which is the ABSOLUTE WORST! They installed mini splits at our house April 2019. They didn't finish covering the ugly black cables on my house exterior, claiming the contract only covered the vertical cables!!! Not the horizontal ones!!! If they ran them under the soffit or down along ground level might have been less noticeable, but they ran smack in the middle of the wall!!! It took calling Home Depot for NINE MONTHS (!) to finally get the ugly black cables covered! One month later one of the units flooded
Robert Bernard
Dec 21, 2019
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Danisi is the best !!!, They came out last night in the cold and cleaned my boiler ( I just had one of those face book fly by nights do it 2 weeks ago) . After my house filled up with smoke I called Danisi after my neighbor said I should call her company, they always respond and she was right!!. Mike came with 20 minutes and said the parts the other company used were wrong , The nozzle was way to big, anyway after about and hour he had it running and safe. I would recommend DanisI to anyone who wants good honest fast service !!
Love Happy Music
Sep 09, 2019
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I'm extremely pleased at the immediate response and great service.
Vic was attentive and extremely knowledgeable. I plan on being a customer for a long time.
Vic was attentive and extremely knowledgeable. I plan on being a customer for a long time.
