If you’re in the market for a new furnace, it’s important to understand the key supporting structures of a new furnace installation. Without them, your new furnace won’t be able to do its job efficiently and effectively. Here are some guidelines about how these structures can impact the functionality of your furnace, your home’s comfort, and overall energy efficiency.


Your furnace relies on ductwork to distribute the heated air through your home. The quality of the ductwork installation is crucial, as leaks and poor connections can reduce the efficiency of your furnace and cause it to wear out prematurely. For new furnace installations, the ductwork must be appropriately sized and installed to avoid problems down the road.

Furnace repair Concord NH experts also note that the connections between sections of ductwork should be sealed with mastic sealant or metal tape. Using adhesive caulk in place of proper sealing materials can reduce your furnace’s performance and lead to premature wear.

The ductwork should also have proper insulation to prevent the formation of condensation. It should also keep heated air from escaping through the walls of the ducts. This can help your furnace run more efficiently, which will lower its operating costs as well as improve indoor comfort levels.


The chimney gives the combustion byproducts a place to be released. Vented gas furnaces also have a chimney, but it’s not as significant because there is no flue for exhaust gas to escape through. If you have an old house with brick or stone exterior walls, your home may already have a traditional masonry chimney. However, these are not always appropriate for modern and energy-efficient furnaces and heating systems.

A chimney should be able to accommodate a venting system that is large enough to allow all the combustion byproducts from your new furnace to exit safely from your home. If you’re wondering if your existing chimney can be used with a new furnace, have it inspected by a professional. If you don’t have one, you will need to install one. Opt for a prefabricated metal chimney, which is relatively easy to install.


One of the key supporting structures of a new furnace installation is the system of vents in your home. This system helps evacuate combustion gas and moisture from the home, and also supplies fresh air to the furnace. There are a few different types of vents that you can use in a furnace installation:

  • A single pipe system uses one large pipe to carry both the fumes and moisture out of the house.
  • A two-pipe system uses one pipe for gas and a separate smaller pipe for water vapor. Tech people believe that this system is more effective than a single-pipe system. The reason is that it allows the gas to cool down before they are pushed outside, which reduces condensation in your chimney or flue.
  • A three-pipe system uses one pipe for gas, one for moisture, and one for fresh air. This is the most effective type of venting system because it separates the combustion gas from the moist air. It’s also the most expensive to install, however.

Your furnace installer will help you choose the right type of venting system for your home.

Whole-House Humidifiers

Another critical supporting structure of a new furnace installation is a whole-house humidifier, which helps keep the humidity level in your home at a comfortable and healthy level. This can also help reduce respiratory problems and improve your overall comfort. There are several different types of whole-house humidifiers available.  Therefore, be sure to choose the one that is best suitable for your home.

Bypass humidifiers are one of the best options. Unlike steam humidifiers, which use heat to evaporate the water in the tank, bypass humidifiers are more efficient and cost-effective. This is because they do not require electricity or additional energy sources.

Bypass humidifiers use air from the furnace supply ducts to warm up cold water.  They then disperse it into the home to increase humidity levels. The warm, moist air is then distributed through your home via your ductwork and registers.

Hire a Licensed HVAC Technician for the Job

The success of your new installation depends on how well it is installed. The project will be quite demanding and will involve a lot of skills to get all the small details right. You need to take time looking for a licensed HVAC technician who has experience in installing furnaces. A license means that he or she has met some set standards and is qualified to do the job.

Taking care of your furnace also means making sure the entire system is working effectively. Be sure to keep all components of the system in good working order for improved efficiency and reliability overall.


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