Trystan Casey
Electric furnaces are a great way to heat your home efficiently. They are also a good choice for melting down aluminium for casting. Electric furnaces are generally more efficient than charcoal, wood, or propane-burning furnaces because they convert electrical energy into heat through friction, resulting in fewer sources of efficiency loss. When installing an electric furnace, it's important to decide whether you want to heat a single room or multiple rooms, as this will determine the type and size of the furnace you need. You should also consider the power requirements and whether any modifications, such as holes in the wall for air intake, are necessary. While installing a simple electric furnace may be a DIY project, it is recommended to consult a qualified professional, especially for more complex duct systems.
| Characteristics | Values |
|---|---|
| Type of furnace | Decide if you want to provide heat for just one room or create a duct system to deliver heat to other rooms |
| Furnace placement | If opting for a bigger furnace, adequate placing is required. Besides the power socket, it requires an air intake source, which will mean a hole in your wall |
| Power line | Ensure the power line is heavy-duty; you may need to provide a special wiring system to avoid blowing fuses |
| Clearance | Take into account the clearance from combustible materials |
| Ducts | Bring ducts to every room you want to heat, and connect them to the furnace. Be careful with the joints to avoid leaks |
| Airflow | For bigger systems, ensure the outside fan of the furnace is not blocked by any obstacles |
| Electrical system | Use chicken wire or similar steel wire to connect the burner to the power wires |
| Refractory | Choose a refractory that can withstand high temperatures and won't crack under cyclic heating and cooling |
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What You'll Learn
Choose the type of furnace
The type of electric furnace you choose depends on your specific needs. Firstly, consider the space you want to heat. If you want to heat multiple rooms, a bigger furnace with a duct system is required. This will need to be adequately placed, requiring a power socket and an air intake source, which may mean creating a hole in the wall. Ensure the power line is heavy-duty to avoid blowing fuses.
If you only need to heat one room, a small furnace is sufficient, requiring only a power socket. Baseboard heaters are ideal for smaller spaces, requiring no ductwork. They are low-cost and come in various sizes, but their heat is limited to individual rooms.
Another option for heating individual rooms is a ductless mini-split system, which is easier to install than other space conditioning systems. They are small and flexible, and many models can have up to four indoor air-handling units connected to one outdoor unit.
Electric heat pumps are another option, operating similarly to traditional electric furnaces but with an outdoor segment containing a second coil, fan, and compressor. They can help heat the home faster in the winter and cool it more quickly in the summer.
Radiant heating systems, also known as cove heating, are usually installed near the ceiling. An electric element heats an aluminium panel, which then radiates heat into the room. Quality insulation is required to maximise efficiency.
Modern electric furnaces for industrial purposes are typically either arc furnaces or induction furnaces. Arc furnaces have vertically positioned graphite electrodes that strike arcs directly into the metal bath. Induction furnaces have a coil carrying an alternating electric current that surrounds the chamber of metal, inducing extremely high temperatures.
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Prepare the electrical system
Preparing the electrical system for an electric furnace is a complex task and it is highly advised to call qualified personnel. If you want to try it yourself, here are the steps you can follow:
Firstly, decide whether you want to provide heat for just one room or multiple rooms. If you are opting for a bigger furnace to serve multiple rooms, you need to make a plan for how many fittings the furnace needs. Besides the power socket, it will also require an air intake source, which may mean making a hole in your wall. Ensure the power line is heavy-duty to avoid blowing fuses.
Secondly, when seeking the perfect place, take into account the clearance from combustible materials. Although an electric furnace only provides hot air, continued exposure of combustible materials to hot airflow is not recommended. Once you have your furnace and its position, it's time to get to work.
Thirdly, if you are using a small furnace, the airflow is not a very important factor as it will gather its air from the room. However, with bigger systems, airflow is vital, so make sure the outside fan of the furnace is not blocked by any obstacles.
Finally, once you have the furnace in place, find a suitable track for the ducts. Bring ducts to every room you want to be heated, and connect them to the furnace. Be careful when doing the joints because a bad joint might lead to leaks and a cold room.
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Ensure adequate placement
If you're installing an electric furnace, adequate placement is critical, especially if you opt for a bigger furnace to heat multiple rooms. Here are some key considerations to ensure proper placement:
Firstly, decide on the scale of your project. If you're only looking to heat a single room, placement is less crucial, and the main requirement is access to a power socket. However, for larger-scale installations, careful planning is necessary. Determine whether you want to heat multiple rooms and, if so, plan the exact number of fittings your furnace will need to avoid ending up with insufficient heating capacity.
Secondly, consider the power requirements. Ensure that the furnace has access to a power socket and a reliable power source. If you're installing a bigger furnace, a heavy-duty power line is essential. You may even need to install a special wiring system to prevent blowing fuses every time the furnace starts up.
Additionally, think about air intake. A bigger furnace will require an air intake source, which may involve creating a hole in your wall. Ensure that the furnace has adequate airflow and that the outside fan is not obstructed, as this will impact its performance.
Finally, maintain a safe distance from combustible materials. While an electric furnace only emits hot air, prolonged exposure to combustible materials is not advisable. When choosing a location for your furnace, factor in the necessary clearance from any combustible items.
By carefully considering these placement factors, you can ensure the proper installation and optimal performance of your electric furnace.
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Install the furnace
Installing an electric furnace is a complex task, and if you want a duct system to heat multiple rooms, it is highly recommended to seek professional help. However, if you want to install a small furnace for a single room, you can follow these steps:
Firstly, decide on the type of furnace you want. For a single room, you only need a power socket nearby. For multiple rooms, you will need to plan the exact number of fittings and their placement, ensuring adequate airflow and clearance from combustible materials.
Once you have your furnace, find a suitable location, taking into account the power socket and air intake source. If you require an external air intake, you may need to create a hole in the wall. Ensure the power line is heavy-duty to avoid blowing fuses.
Now, it's time to install the furnace. Dig the hole in the wall, if necessary, and fix the furnace in place. Ensure the edges are well-isolated so that cold air doesn't get in and heat doesn't escape.
After the furnace is in place, connect the ducts to bring heat to each desired room. Be cautious when joining the ducts to avoid leaks. If you are using a small furnace, airflow is less critical, as it will draw air from the room. However, for larger systems, ensure the outside fan is unobstructed for optimal airflow.
Finally, prepare the electrical system. Cut two pieces of steel wire, such as chicken wire, long enough to wrap around the burner's contacts, exit the furnace by about 6", and connect to the power wires. With the burner removed, use pliers to wrap the wire around the leads. Return the burner to the furnace, feeding the wires through. Secure the wires by packing sand or dirt into the holes. Connect the power wires to the steel wires, and you're done!
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Connect the ducts
Installing an electric furnace is a complex task, and if you want a duct system to heat multiple rooms, it is highly recommended to call qualified personnel. However, if you want to try it yourself, here is some general guidance on how to connect the ducts.
Firstly, decide if you want to heat just one room or multiple rooms. If you opt for the latter, you will need to plan how many fittings the furnace needs, so you don't end up with insufficient heating capacity.
If you are installing a bigger furnace to heat multiple rooms, you will need to find a suitable place for it. Aside from a power socket, it will require an air intake source, which may involve making a hole in your wall. Ensure the power line is heavy-duty to avoid blowing fuses. When choosing a location, consider the clearance from combustible materials. Although an electric furnace only provides hot air, it is not recommended to expose combustible materials to continuous hot airflow.
Once you have your furnace in place, find a suitable track for the ducts. Bring ducts to every room you want to heat, and connect them all to the furnace. Be very careful when doing the joints, as a bad joint might lead to leaks and a poorly heated room. When dealing with bigger systems, airflow is vital, so make sure the outside fan of the furnace is not blocked by any obstacles, or you will get very poor hot airflow.
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Frequently asked questions
First, decide if you want to heat one room or multiple rooms. If you want to heat multiple rooms, you will need a bigger furnace with a duct system. This will require more planning, as you will need to ensure the furnace has enough fittings to reach all rooms.
If you are installing a bigger furnace, you will need to ensure there is adequate space, a power socket, and an air intake source. This may require a hole in the wall. You will also need to ensure the power line is heavy-duty to avoid blowing fuses.
Refractory is the insulation that lines the furnace. It should be made of a material that can withstand high temperatures and won't crack under cyclic heating and cooling.
Wiring an electric furnace can be complex, and it is recommended to consult a professional electrician. You will need to connect the furnace to a breaker box with the appropriate wiring and breakers. The wiring and breakers required will depend on the voltage and specifications of your furnace.
