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Furnace Flue Cleaning / Chimney Flue cleaning

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Furnace Flues and Carbon Monoxide Safety Risks

A dirty furnace flue can be life-threatening, causing carbon monoxide poisoning, chimney fires, and debris buildup. A chimney cap with mesh is a must to prevent debris and animal nests from blocking the flue. Our professional sweeps are trained to inspect and maintain furnace flues so your home is safe and your heating system runs smoothly. Don’t leave your furnace flue unclean—call GMT Home Services today.

A furnace flue is part of a heating system that vents combustion gases outside the home. If not maintained properly, a flue can become a safety hazard and pose risks of carbon monoxide poisoning and chimney fires. A chimney liner is necessary to maintain the safety and function of the flue system by providing a protective barrier to the chimney structure. To avoid these dangers, you need to understand the risks of furnace flues and maintain your heating system to be safe and efficient. At GMT Home Services, we know the importance of regular furnace flue maintenance and annual chimney inspections.

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Why Flue Cleaning and Maintenance is Important?

Flue cleaning is necessary to prevent creosote buildup, reduce the risk of chimney fires and to vent combustion gases safely. Chimney cleaning is different from flue cleaning and requires specialized techniques and tools to clean the chimney itself. By cleaning your flue regularly, you will improve the efficiency of your heating system and reduce energy costs. Not cleaning the flue can lead to costly repairs, safety risks and, in severe cases, even fatalities. Scheduling annual inspections and cleaning is the best way to avoid these issues and keep the system running smoothly.

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What is Flue Cleaning?

Flue cleaning is the process of removing combustion byproducts such as soot, creosote and debris from the flue. The flue is the pipe or channel that carries gases and smoke from a combustion source, like a wood-burning fireplace or furnace, to the outside of a building. This is a critical part of your heating system. Flue cleaning ensures that harmful substances are vented out and do not build up in the chimney and cause hazards like chimney fires and carbon monoxide buildup.

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Acidic Condensate in Furnace Flues

At GMT Home Services, we know that while furnace flues don’t face the same risks as wood-burning stoves or fireplaces, the dangers they pose can be just as serious. Gas and oil furnaces produce acidic condensate that can eat away at the flue lining over time. When a clay liner deteriorates, broken fragments can create blockages and prevent harmful gases like carbon monoxide from venting out. Carbon monoxide is the leading cause of accidental poisoning in the US because it’s colourless, odourless and tasteless. The only way to detect it is with a carbon monoxide detector, so every home with a fuel-burning heating system should have one installed and checked regularly.

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Debris and Animal Nests

Furnace flues can also be obstructed by other means, like animals or birds entering the chimney, if a proper cap with mesh isn’t installed. Regular cleaning of utility flues is necessary to prevent dangerous blockages that can lead to serious risks like carbon monoxide exposure. Nests and debris can block the flue and deteriorating chimney masonry can further restrict ventilation. Keeping the flue clear of all obstructions is necessary to prevent carbon monoxide buildup and safe furnace operation.

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Flue Sizing and Configuration

Proper flue sizing and configuration are also important for safe operation. Our chimney professionals at GMT Home Services ensure your furnace’s venting system meets manufacturer specifications. When the flue is the wrong size, excess moisture can accumulate in the combustion gases, which can be very damaging to the chimney and flue system.

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Our industry-leading cleaning and repair company operating in Connecticut, Massachusetts, and Rhode Island. With a proven 12-year track record, we’ve successfully completed over 2,781 projects in the area. With years of professional experience and a strong commitment to customer satisfaction, we consistently uphold our legacy of excellence in every job we complete.

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Flue Inspections During Gas Conversions

Local building codes require the flue to be cleaned and inspected before converting an appliance to gas. Ignoring this step can lead to big problems. Residual soot or oil from previous fuels can accumulate, and when combined with the moisture from a gas furnace, it can clog the flue opening and clean out pit. To avoid these issues, rely on our experienced team to inspect, clean, and maintain your furnace flue for safe and efficient operation.

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What’s the Difference Between a Flue and a Chimney?

A flue is a passage – whether a channel, tube or pipe – through which gases and smoke from a combustion source exit to the outdoors. It uses natural draft, the upward flow of air created by temperature and pressure changes, to vent combustion byproducts from the home.

The chimney is the structure that encases the flue. Often built from materials like masonry, brick, or stone, it extends above the roofline. In some cases, when there’s no flue or liner, the chimney itself becomes the flue. To get the best performance, you can hire a contractor for flue installation or chimney relining.

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Chimney Sweeping vs Flue Cleaning

Chimney sweeping is a type of flue cleaning, sometimes called fireplace flue cleaning. It involves using specialized tools to remove tough combustion byproducts like stubborn soot and creosote buildup.

Utility flue cleaning is the cleaning of the vertical flue connected to appliances like water heaters, furnaces, and boilers. These appliances don’t produce creosote, so their flues don’t accumulate as much debris. Therefore, utility flue cleaning doesn’t require aggressive cleaning methods or specialized equipment.

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Flue Cleaning Process

The flue cleaning process involves using specialized equipment, such as brushes and vacuums, to remove debris and combustion byproducts from the flue.

In some cases, chemicals or cleaning agents may be used to break down and remove stubborn deposits.

Depending on its condition, the flue may need to be disassembled or accessed through the roof or a wall to be cleaned thoroughly.

Because of the complexity and hazards involved, it’s highly recommended that flue cleaning be done by a qualified professional, like an expert chimney sweep, to ensure the job is done safely and correctly.

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Safety Precautions for Flue Cleaning

Flue cleaning can be dangerous, so it’s important to take specific safety precautions to avoid injury or illness. Key safety measures include:

  • Wear protective gear, such as gloves, safety glasses, and a dust mask, to avoid exposure to debris and combustion byproducts.

  • Clear the area around the flue of combustible materials and make sure the flue is ventilated.

  • Use proper ladder safety when accessing the roof or other elevated areas.

  • Don’t use open flames or sparks near the flue, as they can ignite combustible materials.

  • Make sure the flue is clean and inspected before use to avoid carbon monoxide poisoning.

By following these precautions, you can minimize the risks of flue cleaning and stay safe.

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✦ faq's

frequently asked questions

How often should I clean my furnace flue?

To be safe and efficient, a furnace flue should be cleaned at least once a year. Regular cleaning prevents harmful buildup and blockages and reduces the risk of carbon monoxide leaks. If you smell, hear, or see decreased heating performance, you should schedule a cleaning or inspection sooner.

Is my furnace flue clogged?

If the furnace doesn’t heat the air. The furnace doesn’t heat up, which is most likely to mean there’s blocked venting in the ductwork. It happens when a heating inducer fan hasn’t activated pressure switches when it should. Induced fans circulate air in combustion chambers.

Do natural gas furnace chimneys need to be cleaned?

Don’t ignore the vent system! The CSIA follows the recommendations of the National Fire Protection Association (NFPA) and advises owners and tenants to inspect and clean their chimney gas furnaces once a year and keep them in good working order.

Do I need to clean my chimney if I have a furnace?

Oil furnaces can also produce byproducts if they don’t vent properly. To avoid unnecessary risks, you’ll probably need to clean the oil/gas fireplace for safe operation.

How often should I clean my gas furnace chimney?

Chimney inspections are done every 3-4 years. However, most homeowners, especially those who use their fireplaces, frequently clean their chimneys yearly. Other ducting systems that run through a stove or furnace also need to be cleaned regularly to be safe.

What’s the same between Chimney Sweeping and Flue Cleaning?

Both chimney sweeping and flue cleaning do the same thing: clear blockages from the flue so gases and smoke can pass through. In both cases, animal nests are the usual culprits, so removing them is a key part of both processes. Furnace flue cleaning is a maintenance task that requires attention to safety, technique and best practices.
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Book Your Chimney Services Now

Ensure the safety and efficiency of your fireplace by scheduling your relative chimney service with GMT Home Services today we are committed to providing top-notch various chimney services to ensure your home is safe and your fireplace is running efficiently.

Our experienced technicians offer a comprehensive range of chimney services tailored to your specific needs. From thorough cleaning and inspections to repairs and maintenance, we’re committed to keeping your home safe and your fireplace functioning optimally.

Experience the benefits of a cleaner, healthier home by scheduling your required chimney service with us today.

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