Top HVAC Company in Wilmington

The HVAC system is responsible for the indoor air quality in your homes. Without a sound HVAC system, bacteria and germs can fester and grow in the air. This can easily cause sickness and diseases. Some of the most common problems with HVAC systems are:

  • Dirty filters
  • A dirty condenser or evaporator coil
  • Lack of maintenance
  • Blown fuses
  • Mechanical wear and tear

These can easily cause breakdowns and malfunctions. While DIY videos are readily available online to solve these problems, hiring a professional is a much safer option. HVAC system technicians in Delaware are required to have special licensing. This means they’re more than equipped to troubleshoot and solve your problems. If you’re looking for HVAC Companies, Wilmington, DE, to help you upgrade your system, choose D&T Heating and Cooling.

Who are we?

D&T Heating & Cooling has been providing HVAC repair in Wilmington, DE since our establishment. We have 25 years of experience in HVAC systems. We’re a family-owned business and have been serving the community loyally. We’re registered with the Delaware State and have acquired appropriate licensing to provide HVAC services in the state. 

Currently, we provide services to New Castle County and surrounding areas. We provide emergency services for all systems and are dedicated to providing the best service you can find in the market.

Our Services

Our HVAC services include:

  • AC Installations and Replacement
  • AC Maintenance and Tune-ups
  • Heater Installation and Replacement
  • Heater Maintenance and Tune-ups
  • Smart Thermostat services

Why choose us?

  • Professional Technicians: We hire some of the best technicians in the city. Our technicians undergo special licensing according to Delaware state laws before they’re eligible to provide HVAC services. They also have to undergo regular training to keep their knowledge of all systems up-to-date.
  • Experienced in construction: Our technicians are trained to troubleshoot problems in all kinds of HVAC systems. We cater to old and newly constructed buildings throughout the city. While most of our clients live in residential buildings, we also provide HVAC services for small commercial buildings.
  • Complete Packages: You can hire us to install or replace your heating or cooling system. Following that, we also provide regular inspections and check-ups. If we detect a problem during this, we can repair, maintain, or tune-up your system accordingly. If you choose our complete HVAC package, you won’t have to worry about anything else!
  • Customer-oriented: We are a customer-oriented business that depends entirely on customer satisfaction. We use only the best name-brand tools available in the market. All our materials are inspected and tested before installation. We guarantee our work will be to your satisfaction. If you notice any mistakes, later on, you can contact us again.
  • Promotions & Financing: We always work within the budget so that our customer doesn’t have to spend anything extra. We also provide various promotions throughout the year. For those who have a bad credit score, we also provide various financing options. You can find details of promotions and financing on our website, or you can contact us!

If you’re looking for an HVAC Companies, Wilmington, DE, contact us now!

Best HVAC Repair Service in Wilmington

Heating, air conditioning, and ventilation systems require regular maintenance to keep them in the best shape possible. Without that, they can malfunction or break down. The advantage of an HVAC system is that they show symptoms before breaking down. Some of the symptoms are:

  • Weird or unusual sounds
  • Foul smell or smell of gas
  • No hot or cold air
  • No airflow at all
  • A rise in electricity bills

If you notice any of these symptoms in your system, it is time to call a technician to have a look at your HVAC system. One of the best services for HVAC repair Wilmington, DE, is D&T Heating and Cooling.

Who are we?

D&T Heating and Cooling is a family-owned HVAC service. We’ve been serving the New Castle County and surrounding areas since our establishment almost 25 years ago. We’re registered with the Delaware State and have acquired the particular license for providing HVAC services in the state. Since we were established and take pride in saying we provide one of the most affordable HVAC repair services in the state, we’ve been serving the community loyally.

Our Services:

We provide many HVAC services, including:

  • AC Installation and Replacement
  • AC Maintenance and Repair
  • Heater Installation and Replacement
  • Heater Maintenance and Repair
  • Smart Thermostat

Why choose us?

  • Pocket-friendly: We provide services at market cost. If you have a budget, we will stick to the amount you provide. We also update all our customers on pricing and costs, so you know where your money is going. If you’re unsure how much our services will cost you, you can ask us for an estimate before hiring.
  • High-quality equipment: We use only the best quality equipment available in the market. All our raw materials, tools, and products come from name-brands only who have proved to be trustworthy. Additionally, we also inspect all our materials and maintain proper records of them to provide you with the appropriate warranty/guarantee. If you notice any problems with your workmanship, we will always be present to help you out again.
  • Online and offline booking options: Our services can be booked online if you’re unable to call us to book a slot. Simply open our website, add your contact details, service you require, address as well as the time you’re most comfortable with. Our technician will be present at the time of your choice without fail.
  • Complete Service: We provide services in both commercial and residential buildings that are old as well as newly constructed. If you’re looking for Heating services Wilmington, DE, you should choose our complete service package, including regular inspections, tune-ups, maintenance, and repairs. These services can be booked ahead of time or last minute.
  • Special Maintenance Plans: If you have an existing HVAC system, you can contact us regarding our unique maintenance plans. This includes check-ups and inspections every three months. If we detect any problem in your system, we’ll give you a heads up so that you can choose to repair the system immediately instead of waiting for it to break down.

If you’re looking for  HVAC repair Wilmington, DE, contact us now! 

Reduce Your Carbon Footprint By Heating Your Home

According to a survey done by D&T Heating and Cooling- One of the reliable HVAC companies in Wilmington, DE, more than 20% of Wilmington’s total carbon emissions come from the energy used to heat homes. That is because when there is a cold wind in winter, every homeowner tries to heat up their household.

Nowadays, people are even more careful about their carbon footprint than ever before. In addition, everyone is looking for low carbon heating to reduce the impact of their carbon footprint on the planet.

Bring Your Carbon Footprint Down With Appropriate Heating Solutions

Well, in the cold winter of Wilmington, it is impossible to survive without a heating device. On the other hand, this is the moment when we have to try to deal with the climate crisis. Here at D&T Heating and Cooling, we want to inform homeowners of Wilmington about their journey to reduce carbon emissions. It’s just a way to change the way they use the energy to heat up their home.

Here Are Low Carbon Heating Systems That You Can Use for Your Home:

Room Heaters:

Once upon a time, people used to count room heaters to be useless devices, but the story has changed a lot. Nowadays, they are considered less efficient to save energy and reduce bills. Room heaters release heat and keep your home warm in the winter. Besides, it’s a great way to keep your home comfortable while reducing your carbon emissions.

Nowadays, room heaters are being manufactured with the latest technology and they are ready to give greater efficiency and comfort than ever before. In modern room heaters, manufacturers have added the feature of connecting the device to the thermostat, and you can set the desired temperature for the device.

Heat Pumps:

Heat pumps are another low carbon device to keep your home warm and comfortable. Heat pumps are an alternative to fossil fuel furnaces and they run on electricity. They absorb the heat from the outside air and heat your home. The main component used in a heat pump is air, which is a natural and renewable resource. Thus, heat pumps are environmentally friendly.

Additionally, heat pumps are very efficient and there are many types of heat pumps available in the market.


Boilers are also an important source of warmth and comfort during winter. If you compare the old model of boilers with the new ones, you will find sky high differences as new boilers are more energy efficient. This means that new boiler models help people to save energy and money.

The decision of reducing your carbon footprint is a big step that you can take for nature—partner with D&T Heating and Cooling in your journey of reducing the carbon footprint. We offer top-notch heater repairs in Wilmington, DE. Besides, we help the homeowners to find the right solution for their home heating. We offer specific tips for reducing energy waste.

We are here to schedule a heating/heater/furnace replacement, installation, and repair, services in Wilmington, DE. Call us – 302-838-6905 or fill out our contact form to schedule a service.


How To Fix A Furnace Flue?

If your furnace is not heating your home properly as it used to do before, or if your electricity bills are exceeding your monthly energy budget, you should check your furnace and its flue. Your furnace’s flue helps in eliminating carbon monoxide safely from the interior of your home.

Over time, the metal of the furnace flue begins to rust. Moreover, if you do get corrosion, it could be a sign that your furnace flue has not been treated for a long time.

If you avoid taking care of your furnace flue even after noticing the rust formation, you may be at risk of emitting dangerous gases into your home.

Replacing a flue is a complex process and you need experienced hands to do it. D&T Heating and Cooling are highly trusted HVAC companies in Wilmington, DEOur trained and certified HVAC technicians can handle all your home improvement projects, including replacing your furnace flue.

How To Tell If Your Furnace Flue Needs To Be Replaced?

If you can see a leak, it’s a clear sign that you need to repair the flue, but it’s important to remember that not all rust is visible. Your furnace’s exhaust stack extends above the roof and it is hard for you to detect any damage. You can schedule several annual cleanups and inspections to monitor furnace flue. During the annual maintenance, our HVAC technicians alert you to the problems.

How To Replace the Flue Yourself? 

If you are confident in your skillset, you can replace your flue by yourself. First of all, you need to turn off your furnace.

Materials You Will Need: 

  • Tape measure and pencil
  • Gloves
  • Ladder
  • Cordless drill
  • Galvanized sheet elbows and sheet metal ductwork
  • Screws
  • Flue glue or high-temperature silicone
  • Device for pipe crimping
  • Pliers and snips

A Step By Step Guide To Replace Your Furnace Flue 

Remove The Old Flue:

To start the process, you need to unscrew the connections and remove the damaged piece. You need to use a clean cloth to wipe around the edges of the flue.

Cut A New Piece:

Measure the length of the old piece using tape and then use a snip to cut a matching length as the flue pipe. Use a pipe crimper to crimp one end of the pipe.

Push The Pipe Inside:

Next, take the cut pipe and replace it with the old flue and fix all the connections. You need to drill and secure the pipe using some metal screws.

Caulk The Connection:

You can use high-temperature silicone caulk to seal the joints completely. This will prevent the gases from escaping and will help your furnace to run better.

If you encounter any problems during the process or after your project, you can call a professional from D&T Heating and Cooling to check your flue and furnace. If you think and understand the need for help before starting your DIY project, you can call us anytime. With a team of experienced HVAC contractors, we are providing all heating/furnace replacement and installation services in Wilmington, DE. Call us today – 302-838-6905.

Should I Replace the Air Conditioner and The Furnace Together?

The heating and cooling devices inside our home require a considerable investment. Thus, replacing an air conditioner and a furnace at the same time not only sounds expensive, but it actually is. After looking at this from a different perspective and after talking to many homeowners who have replaced their air conditioner and furnace together, we concluded that replacing both the device at the same time may be expensive. Still, it saves you money in the long run. But the question is if your air conditioner has given up, but your furnace can be fixed with heating services in Wilmington, DE should you consider replacing your furnace too?

Replacing the Air Conditioner and the Furnace at the Same Time

An air conditioner runs for 15 to 20 years, whereas the average lifespan is 15 to 30 years. Thus, a furnace works twice as long as an air conditioner. And you might be tempted to postpone the replacement of your furnace if it’s not too old. However, if you are replacing your air conditioner, you must consider changing your furnace to contribute to the entire HVAC system’s efficacy.

When Must You Replace the Air Conditioner and The Furnace at The Same Time?

While it is not necessary to replace your air conditioner and furnace at the same time, you may consider replacing it if the following contemplations are applicable in your case:

Your Furnace Is More Than 15 Years Old: If your furnace is 15 years old, it will definitely start losing its efficiency over time. If you are replacing your air conditioner, you can replace your 15 years old furnace too. A new furnace will increase your home comfort and will help the entire system to work efficiently.

If the Installation Is Complicated: In many cases, it is difficult to replace your air conditioner alone, due to the common electrical wirings. And the HVAC technicians may find replacing both the systems to be a better choice.

If You Want to Avoid Repairs and Replacement for A While: A new furnace will keep the need for heating replacement in Wilmington, DE, at bay. A new air conditioner and furnace together will keep your home comfort uninterrupted.

When Don’t You Need to Replace Your Air Conditioner and Furnace Together?

There are many instances when you must consider waiting to replace your furnace at the same time as your air conditioner, such as:

A furnace lasts for 20 to 30 years, and if your furnace is less than 10 years old, replacing the system may turn out to be a wastage of money. But your air conditioner needs to be changed every 10 to 15 years. And if your air conditioner has reached its maximum lifespan, you must replace the AC alone.

It’s always better to talk to an expert for professional suggestions before making a final decision. Talk to D&T Heating and Cooling to inspect your air conditioner and furnace and determine if you need to replace both the system. Contact us to get free estimates for replacement and other heating services in Wilmington, DE.


Some Heating Mistakes That Are Raising Your Electricity Bills

The coldest months are almost here, and there are many things you can do to increase your furnace’s efficacy. After all, your furnace accounts for the largest part of your monthly utility bills. But while you are putting every effort to save on your energy bills, some misinformation may lead you in the opposite direction, and you may end up needing pricey furnace repair in Wilmington, DE. Before you start believing some wrong information to be accurate, here we are to help you avoid some common mistakes to not spend anything over what’s necessary.

Top 5 Heating Mistakes Spiking Your Utility Bills

There are many mistakes that the homeowners commit while heating their houses. But we have listed the most common and top 5 mistakes responsible for raising your electricity bills.

Heating an Empty House

If you stay out of your home most of the time or unavailable during the weekend, don’t heat your house the way you do when you are present at your home. This mistake is made specifically when you rely upon a manual thermostat for controlling your room temperature. And you can deal with this mistake just by installing a programmable thermostat replacing the old one. A programmable thermostat will save money on energy bills while making your system work less and keeping it safe from pricey furnace repair in Wilmington, DE.

Not Changing the Air Filters

When your furnace air filters are clogged or dirty, they can make your furnace work harder than usual. All HVAC companies in Wilmington, DE, suggest cleaning your air filters frequently and to change them every 30 to 60 days. If you avoid this simple step for long, you waste energy instead of using the power supply sensibly.

Ignoring Drafts and Leaks

Don’t underestimate the amount of heat you are losing due to leaks and drafts. If your France is generating warm air, but if you can’t feel the warmth consistently, it is a sign that your home is losing the warm air. As a result, your furnace will work harder than it should to maintain the comfort inside your home. And you will notice a drastic rise in your electricity bills. Seal the gaps from where cold air is coming, or warm air is leaking out.

Using Your Fireplace for More Heat

Well, it may seem like a great idea, but it is not. When you use your fireplace along with the furnace, you do more harm than good. The heated air will go straight out of your house through the chimney, and cold air will enter from outside. It will make your house colder and will force your furnace to work harder.

Neglecting Regular Furnace Repair

You need to arrange regular heater repair in Wilmington, DE, to maintain your system to work efficiently. But if you miss regular checkups, remember that even a small undiagnosed issue in your furnace may turn into a costly maintenance problem.

D&T Heating and Cooling offer top-notch furnace repair in Wilmington, DE. Our technicians are available 24/7 to serve you. Talk to us and schedule an appointment today! 302-838-6905.

HVAC System

How to Get the Most from Your HVAC Systems?

Is your HVAC system in good shape, or are you relying on HVAC companies in Wilmington, DE, to keep your system running? If your HVAC system is not incredibly old, but still it is consuming much energy and wasting your money, there are severe problems in your system. A malfunctioning HVAC may also affect the indoor air quality and lead to significant problems such as “Sick Building Syndrome.” You can even get closer to big maintenance bills. If so, you need to know what is wrong with your HVAC system and must fix it before it turns into unrepairable problem or a system replacement.

Here Are Some Tips to Help You to Get the Most from Your HVAC System 

Buying an HVAC system is a big investment for the next 10 to 15 years. But with time, your HVAC starts losing its efficiency by 5% every year. Depending on the system’s level of use, and the maintenance of your HVAC, it can run beyond its promised lifespan. We have listed some easy steps to take care of the system so that you get the best return of investment from your HVAC. 

Service Your HVAC System Annually 

Almost all HVAC companies in Wilmington, DE, recommend inspecting and servicing your HVAC at yearly intervals. However, many homeowners overlook this necessity and forget to service their system for more extended periods of time. For some, this negligence is due to cost issues and for others, due to forgetfulness. Skipping the annual service for your HVAC system can lead to spending more energy bills. It also harms the health and safety of your family and put you at risk. A licensed HVAC technician can help you to ensure if your unit is operating correctly and at its maximum efficiency. Through our yearly maintenance, you can save money in the long run. 

Check Electrical Insulation 

Your HVAC system has internal and external electrical installation to get power supply in every system. The electrical wires are not accessible superficially. Thus, for a homeowner, it is a critical job to check and fix any problem in the electrical insulation. A professional HVAC technician can inspect and address any problem with the electrical wirings so that you can be safe and secure from any hazard. 

Keep Your HVAC System Clean 

Cleaning your HVAC systems sounds a little more severe as compared to the tips mentioned above. But trust me, without a clean HVAC system. You can’t get the comfort you expect from your unit. Routine cleanup of your HVAC must be done to make sure that there are no clogs to affect the airflow inside the house. 

D & T Heating and Cooling – one of the fast company for HVAC repair in Wilmington, DE is a team of experienced HVAC technicians. We deal with all major AC companies in Wilmington, DE and offer installation, repair, maintenance, and tune-up services for any HVAC system. If your HVAC is facing any trouble which needs immediate action, call our technicians to schedule an emergency visit. 

air conditioner

How an Air Conditioner Works?

An air conditioning system is not a luxury anymore, but it is necessary for many homeowners in the modern world. The global temperature is rising every day. Only a central air conditioner can provide some respite from the blistering heat and humidity in such a situation. There are various options to choose from while it is about cooling your homes, and each of those options has unique pros and cons. An air conditioner is one of the most complex and essential systems in your home. A professional air conditioner repair in Wilmington, DE, can help you deal with your HVAC system problems. But you should understand the basics of the system.

Knowing a bit about your HVAC system helps you to perform some types of maintenance of your own. Whenever you spot some imminent problems, you can reach an expert for help.

What Is the Working Mechanism of An Air Conditioner? 

If you want to know how an air conditioner works, it’s pretty simple. The system uses energy to cool down the air inside your house and blow the warm air outside your house. The working of an air conditioner is based on the physics of evaporation. But in an air conditioner, the evaporation occurs within a closed-loop, and a chemical compound named “refrigerant” is converted from liquid to gas and back to liquid in continuity. The refrigerant is easily convertible to gas in relatively low temperatures as compared to water. The most widely known refrigerant is actually Freon, which is a trademarked combination of several components.

What Your Air Conditioner Does Indoor?

The cooling process of your air conditioner takes place within the air handler unit, which includes the evaporator coil. The evaporator coil helps turn the liquid refrigerant into a gaseous form, and the operation takes place to remove the heat. The central air handler then blows the air taken from your home over the evaporator coil while cooling it. The cold air is then blown into your house and reduce the temperature.

What Your Air Conditioner Does Outside?

Once the evaporation process is finished, the refrigerant moves through the loop system to the condenser unit. The condenser unit experiences a compression that squeezes the gas’s volume and converted back to a liquid form. The cycle of the transformation repeats through the system. Just like the evaporation, the compression also creates heat. The compression unit, which is established outside, emits the heat via a set of condensing coils. And the big fan we just on the top of the outdoor unit helps blow the excess heat out into the air.

There are several types of air conditioning systems to choose from. you can contact AC Contractor Wilmington, DE. It is challenging to learn about a complete air conditioning system in just one day. It needs years of experience and in-depth research to know more about your air conditioner. With time you get to know a lot of things about your AC unit. There are many minor repair work that you can handle all by yourself at home without professional guidance, such as changing or cleaning your air filters, changing the thermostat setting, unclogging your outdoor unit, etc. If you need professional help for air conditioner repair in Wilmington, DE, call D & T Heating and Cooling.


Why Is My Air Conditioner Running Constantly?

Is your AC running constantly without cycling on and off as frequently as it should? When the temperature soars, it’s common for air conditioners to run continuously. But if the non-stop AC cycle is accompanied by an increase in the utility bill, you may want to consult an AC contractor in Wilmington DE.

The problem may seem benign at first but can cause long-term damage to the unit if it remains unresolved. There are many factors responsible for this phenomenon. Some of the common ones are as follows:

Variable Speed AC

Variable-speed air conditioners are different from single-speed ACs as they keep running at a lower capacity to keep your house cool. They offer a wide range of speeds but are very energy efficient. Therefore, if your air conditioner is running constantly, you may want to check if it’s a variable speed AC. If this is not the reason, you should contact a qualified HVAC company that offers the best air conditioner repair in Wilmington, DE.

Undersized Air Conditioner

If your air conditioner is undersized, it will experience extra strain to produce desirable cooling. The right size of an AC as per your requirement is determined by your home’s size and layout. If the AC is too small, it will have to run constantly to meet the thermostat temperature. If the issue not resolved quickly, it can cause overheating, putting the internal components at the risk of premature wear and tear.

Oversized Air Conditioner

If you have recently got your air conditioner replaced or installed, chances are that you might have opted for an oversized unit. This can also lead to short-cycling, which causes hot and cold spots in the house and makes the air muggy. In such a case, it’s good to rely on professional advice. Let an AC contractor in Wilmington, DE diagnose the exact problem with your system.

You would be surprised to know that more than half of the heating and cooling systems are installed improperly in the United States. Therefore it is necessary to trust the experts.

Lack of Maintenance

Experts suggest that central air conditioners should be inspected at least once a year in order to keep them efficient and functional. The process of AC maintenance includes deep cleaning of the unit, which prevents the build-up of dust and debris. If not cleaned, debris restricts the airflow and makes your air conditioner run incessantly to cool your house.

Ignoring timely maintenance of your heating and cooling system often leads to cost-intensive HVAC repair in Wilmington, DE. Therefore, contacting experts for AC service immediately is a smarter choice.

Similarly, there are several other technical problems that can result in air conditioners running continuously. These include clogged filters, dirty coils, faulty blower motor, and extreme humidity.

If you are looking for a reliable HVAC contractor for air conditioner repair in Wilmington, DE, your search ends here. D&T Heating and Cooling 25-year experience in the industry and trained HVAC technicians are equipped to handle all your AC repair, maintenance, and replacement needs. To request a service estimate, call 302 838-6905 now.


5 common household products that pollute the air in your home

People often feel safer indoors when pollution levels outside turn alarming. However, did you know that the U.S. Environmental Protection Agency has revealed that indoor spaces are nearly two to five times more polluted than the outside environment? The major sources of indoor pollutions are some common household products.

Poor indoor air quality means an increase in allergy-triggering dust mites, molds, and pet dander. This can be troublesome especially for those with existing health conditions such as Asthma and other respiratory ailments. With people spending almost 90 percent of their time indoors, this may sound scary.

The indoor pollution is likely to get worse during the winters because homeowners tend to keep their windows sealed, blocking the ventilation. So being aware of the common indoor pollutants can help you keep impurities in the air under check.

Common Indoor Air Pollutants


Your house may appear tidy after deep cleansing with scented cleaners but it causes a lot more damage to your indoor air quality than you can imagine. This is because of the higher volatile organic compounds (VOCs) in these products. To prevent this, you can use natural cleaners such as vinegar and baking soda to clean your house.


Paints are known to emit gases, exposure to which can cause breathing issues. It is advisable to dispose of your empty paint cans as soon as possible. If there’s a need to store them, do not keep it inside your house or garage. Choosing paint with lower VOCs might also help address your concerns.

Aerosol Sprays

Aerosols are notorious for contributing to not only indoor pollution but also outdoor air pollution. Aerosols are minute particles or liquid droplets in the atmosphere. These fine droplets are easy to inhale while breathing and can cause serious health concerns. Substitute items like hairspray with non-aerosol alternatives.

Air fresheners

Your air freshener is a bottle that contains nearly 100 chemicals, which are released into the air with a single spray. This can trigger migraine and asthma attacks. Keeping windows open is an effective alternative to keep fresh air coming in. Otherwise, unleash your creative side to try several DIY products that produce similar results without causing pollution.


Who doesn’t use candles to light up the mood and warm up the ambiance? But candles release a chemical compound named formaldehyde, which is harmful to health. It contributes to the indoor particulate matter and can even cause lung inflammation.

Sometimes it’s just impossible to avoid air pollutants completely. Therefore, the situation calls for a much more efficient mechanism to improve indoor air quality. These include the installation of a ventilation system or seeking HVAC repair in Wilmington, DE if you sense an increase in indoor air pollution.

Did you know that the right level of temperature and humidity is also important in reducing indoor contaminant levels? An HVAC system allows you to monitor these parameters. D&T Heating and Cooling provide a wide range of air purifiers and excellent ventilation services.

If you are concerned about your indoor air quality and its impact on the health of your loved ones, call 302-838-6905 to request a service estimate. We also offer the best air conditioner repair in Wilmington, DE.