Request Estimate

Request Estimate »

Request a Free Estimate Today!

HVAC Troubleshooter

HVAC Troubleshooter »

Why bother if you can check and fix the problem yourself?


Contact »

Call us for help.
(631) 732-6666

About Us

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 More

Our Services

Heating In Medford, NY


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.

Learn More »
AC Services In Medford, NY

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.

Learn More »
Oil Delivery In Medford, NY

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.

Learn More »
Ductless In Medford, NY


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 »

Our Featured Brands

Serving Long Island and the Surrounding Areas for over 60 Years

Get A Quote