How to Install Heaters in a Central Heating Furnace? Step-by-Step Instructions

Marcin Napierała

September 9, 2025

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5 min czytania

Installing a heater for a central heating furnace is a procedure that requires great care and knowledge of the heating system. Each stove and heater have their own assembly instructions, nevertheless, the order of execution of work is in most cases the same. Check out how to prepare for the replacement of parts in the boiler and how to mount the heater in the tile stove.

Installation of CO furnace heaters step by step

Incorrect installation of a heater for a CO stove is a direct threat to the life and health of household members, therefore, before deciding to replace it yourself, carefully study the operating instructions and, in case of any doubts, entrust the implementation of work to professionals. Do you trust your abilities? Then check out how to mount a CO stove heater step by step.

Also read: Selection and installation of the heater for the radiator step by step

How to install heaters for the stove what?

Do you want to know how to install CO furnace heaters and gain confidence that you have not missed any stage of the process? Familiarize yourself with the presented scheme of action:

1) Before starting work, disconnect the stove from the power source and wait for it to cool.

2) Locate the installation location — please refer to the product specification for instructions on how to replace the parts.

3) Make sure that the place where you will install the heater for the CO furnace will not interfere with other elements of the device.

4) Prepare the surface on which you will mount the heater. The installation space should be clean and dry so that the fastening is stable and solid.

5) Installation of the heater may vary depending on the model of the furnace and the heater itself. Depending on the type of device, you may need screws, clamps or other connecting elements.

6) After mechanically fixing the heater, connect the electrical wires according to the manufacturer's instructions.

7) Make sure the connections are secure and well insulated.

8) Turn on the power and perform a preliminary start of the heater, observing its operation.

9) Configure the furnace parameters according to the instructions of the heater manufacturer.

If you are replacing an old heater with a new one, take a picture of the wires to make sure you have connected them in the same order.

Choosing the right heaters for the CO furnace

The type and model of the furnace, the rated power, the type of fuel used for heating and even the flow of water in the heating system — choosing a heater for a C.O. furnace is not easy. First of all, make sure that the heating element has the right power, which will ensure the effective operation of the heating system. Modern electric heaters are energy efficient and allow you to significantly reduce energy consumption. The greatest interest of users of C.O. furnaces is tubular heaters made of high quality raw materials. To obtain the required parameters and durability manufacturers use, among others, magnesium oxide and stainless steel rods, which are fully resistant to extremely high temperatures.

Did you know that tubular heaters are universal heating elements? You can also use them in other household appliances! Check: Replacing the heater in the boiler step by step

Installation of heaters in the CO furnace

Installation of heaters in central heating furnaces requires great care and precision. Depending on the model of the stove, you may need other tools. In most cases, however, a heater, a screwdriver and spanners are sufficient. In addition to this, take your phone with you to take pictures of the wires. So let's get to work. See how to mount an electric heater for a coal stove.

Connection of heaters to the heating system

You already know how to mount an electric heater for a CO stove. See how this procedure goes in the case of installing a heating element in a tiled stove. Preparatory actions look the same as in the boiler C.O., so let's move on to issues related to the assembly itself.

How to install a heater for a tiled stove?

Select the mounting location. Usually this is the lower part of the furnace.
Place the heater in the selected location according to the manufacturer's instructions.
Make sure the heater is positioned correctly.
Use ceramic glue or tile grout to fix the heater in the furnace.
Connect the heater to the power source according to the manufacturer's instructions.
Apply appropriate insulation around the installed heater (ceramic nonwoven or other material).
Do the test to see if the installation of the heater in the tiled stove went correctly.

Finally, make sure you follow the manufacturer's recommendations. This is a guarantee of correct operation and safety of the installation. If during the work you have encountered any problems, consult a specialist - do not risk the safety of household members.

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