Specialty HVAC Services

Serving Suffolk and Nassau Counties, NY

Service contracts, emergency services, and financing available. 

Enhance Your Comfort With Energywise Inc

Since 1985, Energywise Inc has been the go-to name for heating and air solutions in Suffolk and Nassau Counties, NY. As your neighbors, we're dedicated to keeping you comfortable all year long. Our certified technicians bring over 40 years of experience to every job, ensuring your home or business stays warm in winter and cool in summer. As a proud PSEG Long Island Home Comfort Partner, we offer a full range of services from regular maintenance to emergency repairs, all backed by our strong commitment to quality and customer satisfaction. At Energywise Inc, we recognize that each home and business has its own comfort needs. That's why we provide a variety of services, from energy audits to mini-split installations, all aimed at maximizing your comfort while reducing your energy costs. We're licensed in Suffolk County, Nassau County, and the Town of Islip, ensuring we meet all local standards. We're also looking to the future with our geothermal expertise. For any HVAC need, from a simple furnace check to a complete system overhaul, we're here to help. For better comfort today, contact us and see the Energywise difference.

Why Choose Energywise Inc

Our commitment to sustainable quality means your heating & cooling system will perform at its best when you need it most.

The Energywise team ensures seamless installation and thorough maintenance to keep your system running efficiently year-round.



  • We're here when you need us most
  • We service all brands and fix small issues before they become big problems
  • Our team is fully trained and backed by over four decades of experience
  • Proud to be a PSEG Long Island Home Comfort Partner
  • A+ Rating with The Better Business Bureau
  • Fully Licensed & Insured in Suffolk & Nassau County
  • Clean History with Suffolk & Nassau County Consumer Affairs


Energywise Inc

Energy Audit

Find out how to save energy with our thorough energy audits. We'll check your property carefully, find areas where you're losing energy, and suggest cost-effective ways to improve efficiency and lower your bills.

Furnace Inspection

Keep your furnace working well with our detailed checks. Our technicians look at every part, making sure it's working its best and catching any issues early. Regular checks can help your furnace last longer and keep your home warm and safe.

HVAC Inspection

Our full HVAC inspections cover your entire heating and cooling system. We check everything from your air conditioner to your furnace, making sure all parts work well. Regular checks can improve performance, cut energy costs, and prevent surprise breakdowns.

Mini-Split Installation

Enjoy room-by-room comfort with our mini-split installation services. These systems provide both heating and cooling, perfect for additions, sunrooms, or any space needing its own climate control. We'll help you pick the right system and install it perfectly.

Mitsubishi Mini-Splits

As authorized installers of Mitsubishi mini-splits, we offer the best in ductless comfort. Mitsubishi's systems are very efficient, quiet, and give precise temperature control. Let us show you how a Mitsubishi mini-split can improve your home's comfort.

Quilt Mini-Splits

Try the innovative comfort of Quilt mini-splits. These systems are efficient and stylish, giving great climate control while looking good in your home. Our team knows all about installing and maintaining Quilt mini-splits, so you get the most from this new technology.

New Customers

Save $50 on

HVAC Service

First-time customers get $50 off any heating or air conditioning service from Energywise Inc. Experience top-quality HVAC care in Suffolk and Nassau Counties.

Call Energywise Inc!

Not valid with any other offers or promotions. Restrictions apply. Must mention this coupon at the time of scheduling.
(631) 500-5300

5% Discount for Those Who've Served

Energywise Inc offers 5% off HVAC services. Save on heating and cooling solutions for your Long Island home.

Call for Service!

Not valid with any other offers or promotions. Restrictions apply. Must mention this coupon at the time of scheduling.
(631) 500-5300

Here's what our satisfied customers are saying...

At Energywise Inc, we take pride in providing exceptional HVAC solutions to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Energywise Inc and let others know what you think.

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