HVAC Company: The Difference Between Direct And Indirect Heating | Charleston, SC

If your residential or commercial property requires a heating solution, you may want to consider both direct and indirect heating sources. Each type of heating has its own unique features, benefits and drawbacks. By learning more about each one, you’ll get a better idea what’s best suited for your property.

If you have any questions about direct or indirect heating, contact Carney & Son 72 Degrees Air Conditioning and Heating. We are one of the largest and most reputable HVAC companies in Charleston, SC. We are able to deal with a large variety of different HVAC problems with ease.

With that said, this article will give you an idea what’s the difference between the two different types of heating sources. Contact an HVAC company for more information on what may be best suited for your property and your needs.

Direct Heating

Direct heating above the use of some type of book material that will come into direct contact with a heating gas. Basically, it directly transfers the heat from the internal burner to the general airflow. These units will usually convert about all of its fuel into heat.

This type of design is very popular because it is efficient, convenient and affordable. With that said, this type of heating needs proper ventilation. Due to this reason, it is not often recommended for tight spaces unless a good ventilation system is in place.

There are many different types of direct heating systems available. Some of the different ones include:

  • a rotary drum direct heat transfer
  • a fluid bed direct heat transfer
  • a direct contact bulk solid heat exchanger

Although this type of system is easy to use, it does produce a lot of dust. Some experts also claimed that it is not very energy efficient. This type of system requires regular cleaning. They may be used outdoors. For example, if you want to have a fireplace outdoors, you may want to look for a direct heating system, as it may look more aesthetically pleasing in a way.

As direct heating is a bit unique, you will need to look for an HVAC company that specializes in this area. This may not necessarily be easy to find. In general, a company that services outdoor heating will be able to help.

Indirect Heating

And general, all home furnaces rely on indirect heating. These units rely on an enclosed heating cheaper to heat up the room. Cool air is passed over this heat exchanger and will become more and more hot. Indirect heating sources tend to be a bit more expensive to operate. They are also a little bit less efficient. However, they are ideal for tightly sealed, indoor spaces.

This type of heating source is very popular because it is safe. It can also be installed indoors with ease without causing any type of dust emission. This is also the type of heating source that most HVAC companies are trained to work on. Basically any HVAC company that you call will be able to handle these types of jobs.

Like with direct heating, there are many different types of indirect heating systems as well. Some of them include:

  • A rotary drum indirect heat transfer
  • An indirect heat exchanger

When it comes to indirect heating, you will usually have a lot more options to choose from.

Why Indirect Heating Is More Beneficial

In general, you can expect the company to recommend indirect heating. Indirect heating offers more benefits than direct heating. Some of the benefits include:

  • Increased efficiency. The systems tend to be a lot more energy efficient. It uses less equipment and 90% less energy than traditional technologies.


  • Environmentally responsible. Unlike direct heating, indirect heating produces no dust, odor or omissions. This type of energy is also recyclable. For example, thermal energy collected from indirect cooling can be recovered and used for heating.


  • Small installation footprint. These systems are easy to install. You can basically call any HVAC company and get the job done. It’s always a good idea to get several quotes from different companies, as each company will charge not only a different price, but also have different promotions.


  • Easy maintenance. In general, you’ll only need to call the HVAC company to come in and take a look at your system once a year. If you find a reputable HVAC company in Charleston, SC to work with, you can also build a good relationship with the company and get better deals and discounts.

Indirect heating is able to offer years of reliable operation. Due to this reason, it’s highly recommended by most HVAC companies. Look for an HVAC company that can help you find a system that works for your needs. If you need a continuous heating source outdoors, you can also ask a company whether they can install an indirect heating system that heats up those areas.

Learn More By Giving Carney & Son 72 Degrees Air Conditioning and Heating a Call

It can be difficult to understand the difference between direct and indirect heating. Most commercial and residential property owners are not really interested in how the heating system works. They only want a system that does work, it’s cheap to operate and requires little maintenance.

Fortunately, this isn’t really one of those problems that you really need to concern yourself about. All you really need to do is call an HVAC company and let them know what your needs are and what you expect. The HVAC company can help you find a system that works for your situation. They can also help you perform regular maintenance, so your system runs efficiently throughout the years.

As mentioned above, Carney & Son 72 Degrees Air Conditioning and Heating is one of the most reliable HVAC companies. They’ll be able to help you deal with any HVAC problems that come your way. They’ll also be able to take a look at the floor plan and your needs to help you find a system that works.

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