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Furnaces

The furnace, whose name is derived from the Latin word fornax, which means oven, is a heating device utilized for both home and industrial purposes. Questions about furnaces can be asked and answered here.

1,402 Questions

Why are standing-pilot natural-draft furnaces no longer manufactured?

Standing-pilot natural-draft furnaces are no longer manufactured primarily due to advancements in technology and energy efficiency standards. These systems use a constantly burning pilot light, which is less energy-efficient compared to modern intermittent pilot or electronic ignition systems. Additionally, safety concerns related to pilot lights and the push for more environmentally friendly heating solutions have led manufacturers to phase out these older designs in favor of more efficient and safer options.

How do you calculate refractory wear index in electric arc furnace?

The refractory wear index in an electric arc furnace (EAF) is calculated by measuring the thickness loss of the refractory lining over a specific time period. This involves taking initial and final measurements of the refractory lining's thickness and calculating the difference. The wear index can also be expressed as a ratio of the volume of refractory material lost to the total volume of the refractory lining, often normalized by the duration of the operation. This index helps in assessing the performance and longevity of the refractory materials used in the EAF.

What are the pros and cons of using a blast furnace?

Blast furnaces are efficient for producing iron and steel, allowing for high-volume production and the use of various raw materials. They can also be integrated with other processes, enhancing overall productivity. However, they are energy-intensive and contribute significantly to carbon emissions, raising environmental concerns. Additionally, the initial capital investment and maintenance costs can be substantial.

What do old chimney sweep cloths look like?

Old chimney sweep cloths are typically dark, often black or soot-stained, due to their exposure to soot and debris from chimneys. They may be made of rough, durable fabric, such as cotton or linen, designed to withstand harsh cleaning tasks. Over time, these cloths can become worn and frayed, showing signs of heavy use. Some may also have a slightly faded or discolored appearance from repeated washing and exposure to the elements.

Furnace will not lite and blower keeps running blowing cold air?

If your furnace won't light and the blower is running continuously, it could be due to a few issues. Common causes include a faulty thermostat, a clogged air filter, or a malfunctioning ignition system. Check the thermostat settings and replace the air filter if it's dirty. If these steps don’t resolve the issue, it may be best to call a professional technician for further diagnosis and repair.

Is it harmful to turn the furnace on and off with the power swithch instead of the thermostat?

Yes, turning the furnace on and off with the power switch instead of using the thermostat can be harmful. This practice can lead to wear and tear on the furnace components, as they are not designed for frequent power cycling. Additionally, it may disrupt the furnace's cycling and efficiency, potentially leading to overheating or other safety issues. It's always best to use the thermostat for regular operation to ensure proper control and maintenance.

How are furnace switches wired?

Furnace switches are typically wired using a standard electrical method where a switch is connected to the furnace's power supply. The switch is usually installed in line with the power source, allowing it to interrupt the electrical flow to the furnace when turned off. This setup typically involves connecting the hot wire from the power supply to one terminal of the switch and a wire leading to the furnace to the other terminal. Additionally, a neutral wire may also be connected to complete the circuit, and grounding is essential for safety.

How old is your Stevens Savage Model 87R and is it worth fixing?

The Stevens Savage Model 87R was produced from the late 1940s to the early 1960s, making it potentially 60 to 80 years old depending on the specific year of manufacture. Whether it's worth fixing depends on its current condition, sentimental value, and your intended use. If it's in good shape and you appreciate vintage firearms, it could be worth repairing. However, if it has significant damage or you're not attached to it, it may be more practical to consider other options.

What causes a the flame to roll out on a gas furnace?

A flame roll-out on a gas furnace typically occurs when there is a blockage in the venting system, causing combustion gases to back up and not exit properly. This can lead to an unsafe condition where the flames extend beyond the burners. Other potential causes include improper air-to-gas mixture, malfunctioning safety controls, or a dirty burner that affects combustion efficiency. Regular maintenance and inspection are essential to prevent this hazardous situation.

What does a solid red light on a trane xe80 furnace mean?

A solid red light on a Trane XE80 furnace typically indicates that the furnace is in a lockout mode due to a safety issue or malfunction. This could be caused by various factors, such as a blocked vent, a faulty pressure switch, or an ignition failure. To resolve the issue, it's advisable to check the furnace's air intake and exhaust for obstructions, reset the furnace, and consult the user manual or a professional technician if the problem persists.

Is there a replacement for a-100g542 thermopilot relay for a furnace?

Yes, there are several possible replacements for the A-100G542 thermopilot relay, depending on the specific requirements of your furnace system. Common alternatives include relays like the Honeywell R8285A or the White-Rodgers 90-290. It's essential to compare specifications such as voltage, current rating, and mounting style to ensure compatibility. Always consult your furnace's manual or a professional technician for the best recommendation.

What are typical flue gas temperatures of a category 3 gas furnace?

Typical flue gas temperatures for a Category 3 gas furnace generally range from 300°F to 400°F (about 150°C to 200°C). These furnaces are designed to operate with a positive vent pressure and typically vent through a stainless steel or other corrosion-resistant material. The elevated temperatures are a result of the combustion process and the efficient design of the furnace, which allows for condensing flue gases. Proper venting is crucial to ensure safety and efficiency.

What year were Shadrack Meshack and Abednego thrown into the fiery furnace?

Shadrach, Meshach, and Abednego were thrown into the fiery furnace during the reign of King Nebuchadnezzar II of Babylon, which is traditionally dated around 586 BCE. This event is recounted in the Book of Daniel in the Bible, specifically Daniel 3. However, the exact year is not specified in biblical texts, and scholars debate the precise dating of these events.

What is the name for a person who repairs chimneys?

A person who repairs chimneys is called a chimney sweep. They are responsible for cleaning and maintaining chimneys to ensure they function safely and efficiently. In addition to cleaning, they may also inspect and repair chimney structures.

How do you seal gas flue from furnace?

To seal a gas flue from a furnace, first ensure the flue is properly disconnected from the furnace. Use high-temperature silicone sealant or a metal flue cap to cover the opening, ensuring it is airtight to prevent gas leaks. Additionally, inspect the area for any cracks or gaps and seal them with appropriate materials, such as metal tape or a chimney cap, to ensure proper sealing and safety. Always follow local building codes and regulations for gas appliances.

Where can you get a parts diagram for a BDP furnace model 518a036cc?

You can obtain a parts diagram for a BDP furnace model 518A036CC by visiting the manufacturer's official website or contacting their customer service. Additionally, HVAC parts suppliers often provide diagrams and exploded views for various models. Websites like Parts Town or Repair Clinic may also have the necessary diagrams available for download.

Where can you get instllation instructions for rheem gas furnace model rgra-10ezajs?

You can find installation instructions for the Rheem gas furnace model RGRA-10EZAJS on the Rheem website under their customer support or product documentation section. Additionally, the installation manual may be available in the product's packaging or can be accessed through HVAC supply retailers. If you can't find it online, contacting Rheem's customer service directly can also provide you with the necessary documentation.

Why won't the pilot stay lit on my furnace?

The pilot on your furnace may not stay lit due to issues with the thermocouple, gas supply, or airflow. It is important to have a professional inspect and repair the furnace to ensure safe and efficient operation.

Why won't the pilot stay lit on the furnace?

The pilot on the furnace may not stay lit due to issues with the thermocouple, gas supply, or airflow. It is important to troubleshoot and fix these issues to ensure the furnace operates properly.

Why won't my furnace stay lit?

Your furnace may not stay lit due to issues with the thermocouple, gas supply, or airflow. It is important to have a professional inspect and repair the furnace to ensure safe and efficient operation.

Why is there a flashing around the chimney?

The flashing around the chimney is there to prevent water from seeping into the roof where the chimney meets it. It helps to keep the area watertight and protect the interior of the building from water damage.

Why is the pilot won't stay lit in my furnace?

The pilot light in your furnace may not stay lit due to issues with the thermocouple, gas supply, or a dirty pilot assembly. It is important to have a professional inspect and repair the furnace to ensure safe and efficient operation.

Why is my gas furnace not blowing hot air?

Your gas furnace may not be blowing hot air due to issues such as a malfunctioning thermostat, a clogged air filter, a faulty pilot light, or a problem with the gas supply. It is recommended to check these components and consult a professional if needed for further diagnosis and repair.

Why is my furnace not coming on?

Your furnace may not be coming on due to issues such as a malfunctioning thermostat, a blown fuse or tripped circuit breaker, a clogged air filter, or a problem with the pilot light or ignition system. It is recommended to check these potential issues and consult a professional if needed for further assistance.

Why is my furnace not lighting up?

Your furnace may not be lighting up due to a variety of reasons, such as a malfunctioning thermostat, a clogged air filter, a faulty ignition system, or a problem with the gas supply. It is recommended to contact a professional HVAC technician to diagnose and fix the issue.