Thinking of installing a new heating system for your home? If it’s oil or gas furnace installation you want, call us before you install either. We will not only advise you on the most energy efficient furnace but will tell you which one suits your home and heating needs best. There are many kinds of furnace designs that have been made with the best technology, and you have a huge variety to choose from. Once you have made an informed choice, we will carry out the installation with professionalism and care to ensure that your home will be warm and cozy throughout the winter months.

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Are you having problems with the heating system in your home? It might be time to call First Class HVAC for furnace repair. Millsboro, DE winters can be cold and unforgiving. Fortunately, our specialists can make it out to your residential or commercial property immediately. Are you thinking about installing a new heating system in your home? First Class HVAC can do that too. Whether you’re thinking about an oil or gas furnace, we can help you decide. We offer unbiased and highly-qualified advice, ensuring our customers receive the most energy-efficient furnace possible. Given how many options are on the market, our expertise is an invaluable resource to you. Once you decide, we use state-of-the-art technology to remove your old unit and install the new one, professionally and quickly. Gear up for the winter months now and avoid a shutdown when you can least afford it.


First Class HVAC has over 40 years of experience in the furnace installation, repair, and maintenance industry. Our services include Millsboro, DE, as well as many Delaware and Maryland residents. We can provide repairs on both gas and electric furnaces. Your furnace is one part of a complex system of components, so hiring experienced repair technicians is critical to fixing problems when they occur. We know how to find what’s preventing warm air from traveling through your duct system. We know when the problem originates from the furnace itself. Our highly-skilled team troubleshoots issues before rushing in blindly. We want to make sure to correct the problem without needing repeat visits to your home.


Furnace maintenance is a crucial component of homeownership. Many residents don’t keep up with routine maintenance tasks. Unfortunately, the results can be costly. Preventing unnecessary costs is easy, though. First Class HVAC offers maintenance services designed to catch minor or potential problems before they shut down your heating systems. We recommend Millsboro, DE residents call us some time at the end of summer or during early fall, before you start using your furnace. During a maintenance appointment, our technicians inspect the furnace from top-to-bottom, including investigating the status of both the indoor and outdoor units. We look at the vents and ducts, as well as test the system to ensure all systems are working correctly. Additionally, we’ll lubricate individual components. If we feel we need to replace anything, we’ll give you our expert opinion and allow you to decide which course of action to take. Another thing to keep in mind is furnaces become less efficient and prone to breakdowns as they age, making maintenance especially crucial during those years.


An unnaturally cold home is one of the most apparent signs your furnace isn’t behaving and needs repairs. But there are subtler signs of furnace failure. All homeowners should have some understanding of how their heating system works. Staying educated will help you act quickly when your furnace stops working. However, First Class HVAC understands you might not have an intimate knowledge of your heating system, and we know you probably don’t know how to fix it. Fortunately, we’ve compiled a list of can’t-miss signs of furnace troubles:

Strange noises: Furnaces are never silent. For instance, it’s supposed to make noise when it cycles on. However, you shouldn’t hear a loud banging when a new cycle starts. Loud humming, rattling, groans, and buzzing noises are also abnormal sounds. You should take them seriously.

Inconsistent heat: Another sign of an inefficient or malfunctioning system is cold spots. This phenomenon occurs when some rooms in your house are colder than others. A functional HVAC system should heat each room equally.

Short cycling: Furnaces work by working in tandem with the thermostat to “cycle on” when the system demands it. It shouldn’t happen more than a few times a day. If your furnace is cycling on multiple times a day, it’s a sign a component or two aren’t working.

Non-starting: Furnaces that won’t start often fail due to a faulty ignition or even a gas leak. While your furnace has built-in safety features preventing the heater from starting in this situation, it’s still wise to contact First Class HVAC immediately.


In addition to our work on furnaces, First Class HVAC also provides air conditioning, plumbing, water treatment, and crawl space services. We install high-quality furnaces and other systems, and we’re proud to maintain a partnership with Mitsubishi. No matter your problems, First Class HVAC is well-prepared to solve them. We work hard to maintain positive relationships with our customers and Millsboro, DE as a whole, so contact us today.


A huge shout out to 1st Class HVAC we were having problems with the heat in our home , I have had to stay awake for the last six days…

Ric Fowler

In the beginning of September(when the temps were in the 90’s)our central A/C died. We called and they sent a technician named Mike who found the problem and got it…

Jean Burkhardt

The problem first came up on Memorial Day. Gary arrived quickly even though it was a holiday. He discovered the problem and had to order a part which they did…

Dolores Fidishun

Every member of the team was professional, courteous, knowledgeable, respectful, industrious, and delivered such high quality product that I was impressed beyond belief. Duane took the time and effort and…

Steve Feher

Our 12 year old Central AC unit burnt out and needed replacing. We contacted our current service company for an estimate to replace. The sales rep showed up with three…

Bruce Temple

Working with Sean Walsh to design and install our replacement HVAC system was a delight. Mr. Walsh was extremely knowledgeable and did a great job explaining our options based on…

N Marvin

Arrived at our second home only to find that our heat would not come on for what was the coldest night of the season so far. Called First Class, as…


First Class is an outstanding company. My Mitsubishi system was installed by them and now a complete of two bath breakdown and replacement of bath items and pipes was completed…