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About Us
We strive for excellent service.
Danisi Energy is a true family owned and operated full service HVAC and Fuel delivery company servicing the Suffolk County area on Long Island, Danisi Energy has been in business for over 60 years. We are the only true full service Heating, Ventilation, Air-Conditioning Company in the area, we don’t tell you to call the “A/C guy”, or the “heating guy”, or the “plumber”, or “electrician”; we handle it ALL which is what a full service company should be. We are also a family-owned and operated. Even though it has been a challenge to compete with larger corporate companies, we have shined through because of our commitment to our valued customers. Danisi Energy Company Inc. customer knows we care about them and we’re here for the 24 hours a day 7 days a week!
Give us a call, and find out what our customers already know.
Learn MoreOur Services
Heating
Don’t stay uncomfortable this winter! A central gas heating system should be able to provide a consistent amount of warmth to keep you comfortable inside your home. A great furnace can give the best balance of comfort, cost-efficiency, and atmosphere for your home.
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Air Conditioning
If something isn’t installed correctly, it won’t work as it should. This is especially true of air conditioning (HVAC) equipment. So, it’s important to make sure your local HVAC company service technician is experienced, trained, certified, qualified, and backs their work.
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Oil Delivery
Danisi has all of the company resources required to ensure that we never run out of oil, reliable automatic delivery service so you never miss a fill and around the clock service so you always get your heating oil delivered, even through the toughest winter weather.
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Ductless
Ductless systems can eliminate a substantial number of particles in the air that affect the indoor air quality, environment comfort, and safety for your family. Learn more on how you can improve your respiratory health and breath easier.
Learn More »Vic showed the same day even though they were booked solid, fixed the issue no problem
Ed.
Vic was very knowleable,professional, courteous and patient.
Mr C…
Danisi responded right away to my emergency. Mike was excellent. He knew the problem and fixed it in a short time. He was kind and courteous in his explanations and service.
Mike B.
Called back within an hour. Extremely fast delivery!
D Pendzick
I had slomans come in and tell me I needed a new indirect water heater, $ 3000, and it was out of warranty they only put it in 5 years ago. I called Chris at Danisi and he asked me to send him some pics of the superstore. I can’t believe it he found out in less than 5 mins it was under warranty and in fact, it came with a lifetime one, he offered[...]
Frank B.
Ran out of oil yesterday after the severe cold spell and snow storm of last week. Spoke with William @ Danisi, when other companies refused to deliver for next few days. He promised delivery the same day and they delivered oil within hours. Very efficient.
m b
I'm in Miller Place. My heat was out and it was cold in a big part of my home. I called Danisi Energy and got same day service. The tech diagnosed the problem, explained all to me intelligently, gave me a super reasonable price, called his office & ordered the part needed to do the repair. The office called back the same day and said the part would be at 7:30 am the next morning[...]
Nancy Helen
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