Danisi Energy CO

3.8(59)
3205 NY-112, 11763

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Danisi Energy CO — Medford, New York geothermal contractor
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61Years Active

Danisi Energy CO

3.8 (59 reviews)
3205 NY-112, Medford, New York, 11763
(631) 732-6666 Website Request Quote
61+ Years Exp.
Residential / Commercial Projects
59 Reviews
“

Technicians and sales staff demonstrated strong responsiveness, with rapid appointment scheduling and prompt phone/text communication, while installation and repair work was executed professionally with attention to system balancing and cost-effective solutions tailored to customer needs. Emergency service response was notably fast, with technicians arriving within hours during critical situations, and long-term customers consistently reported reliable performance and satisfaction with both equipment installation and maintenance services.

Based on Google reviews

About the Contractor

Danisi Energy Company has served Long Island's Suffolk County from their Medford location at Route 112 since 1965, building over six decades of expertise in HVAC, fuel delivery, and geothermal energy solutions. The company installs WaterFurnace geothermal heat pumps, extracting earth-stored energy through a ground loop to provide efficient heating and cooling without fossil fuels. Their geothermal page explains the full earth-loop installation process for Hampton Bays, Medford, Southampton, Port Jefferson, and surrounding communities. Services include oil delivery, ductless mini-splits, plumbing, electrical, water heaters, and indoor air quality. Managed by President Siegfried Mangels and General Manager Christopher Ghosio, Danisi Energy holds a BBB A+ Accredited rating with continuous accreditation since 1997. Two contact lines: main (631) 732-6666 and East End (631) 283-0400.

Verified active operator per https://www.danisienergy.com + https://www.danisienergy.com/geo-thermal-energy-solutions/ (Bundle 6 audit 2026-05-29)

Long Island energy efficiency specialist in Medford focused on reducing utility consumption through sustainable practices and modern system technology for residential and commercial clients.

Service Details

Years in Business
61 years
Financing
Available
Brands Installed
WaterFurnace
WaterFurnace
Authorized Dealer

Service Area

Serves 10 areas across New York

Southampton Port Jefferson East Hampton Westhampton Stony Brook Smithtown Riverhead Mattituck Southold Miller Place

Browse verified installers in these areas:

SouthamptonPort JeffersonEast HamptonWesthamptonStony BrookSmithtownRiverheadMattituckSoutholdMiller Place

Regulatory Context

Geothermal Permitting in New York

Geothermal heat pump installations in New York require specific permits and compliance with state regulations regarding well drilling, loop installation, and refrigerant handling. Contact your local building department for specific requirements in your area.

See full geothermal regulations →

Frequently Asked Questions

What is Danisi Energy CO's focus in Medford?
Danisi Energy CO specializes in energy-efficient heating and cooling solutions designed to help Medford property owners reduce energy consumption while maintaining optimal indoor comfort.
How can Danisi Energy CO help lower my utility bills in Medford?
Danisi Energy CO delivers professional installation and maintenance services emphasizing sustainable energy practices and modern system technology to reduce energy consumption and improve efficiency.
Does Danisi Energy CO work with both residential and commercial clients?
Yes, Danisi Energy CO works with both residential and commercial clients throughout the Medford area and surrounding Long Island communities.
What makes Danisi Energy CO's approach different?
The company emphasizes customer education and transparent pricing while designing solutions tailored to Long Island's unique climate challenges and each customer's specific needs and budget.

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Listing data verified as of: May 29, 2026

Regulatory Context

Geothermal Regulations in New York

Geothermal heat pump installations in New York may require drilling permits, environmental site assessments, and compliance with local well and thermal energy regulations. Requirements vary by jurisdiction and system type (vertical, horizontal, open-loop). Contact your local municipality, state energy office, or a licensed geothermal installer for specific permitting requirements in your area.

→ Geothermal regulations & permit guide

Browse all geothermal contractors in Medford, New York →

Browse Directory

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Listing data last checked: May 29, 2026

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Category: Geothermal Contractors
Address: 3205 NY-112
Medford
New York
11763
United States

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