The increasing prices of electricity, heating oil, and natural gas have prompted consumers to reconsider their home heating methods. As a result, traditional methods such as heating with a stove are experiencing a resurgence. However, the advancement of technology has introduced new considerations in this product category, which we must take into account before making any purchase.

Fuel Selection

The first decision we will be called upon to make during our market research concerns the fuel with which our future stove will be powered. It should be noted that the subject of this text is stoves powered by wood or pellet, and not those that use oil, liquefied petroleum gas, or electricity as fuel.

¹ There are Pellet stoves that have a battery so that their operation is not interrupted during a possible power outage.

² It should be noted that there are pellet stove models that also support remote control through the use of a mobile phone.

Available Types of Stoves

Fan-assisted

The term fan-assisted that accompanies several of the available stove models refers to the transfer of warm air to various adjacent spaces with the help of a fan. Essentially, thanks to the fan, it provides faster distribution of warm air in the room.

They are the stoves with the most classic functionality, as they provide heat only to the space where they are installed through radiation and through air flow. Both types of stoves can be fan-assisted, whether they are wood-burning stoves or pellet stoves.

Tip: In the case where the stove has a fan, it is recommended to investigate the noise generated during its operation. The unit of measurement for noise is the decibel (dB). Since it is difficult to perceive how quiet or noisy the fan will be during operation from reading this value alone, it is recommended to use it comparatively. That is, compare the dB value produced by the stove you are interested in with that produced by a device whose performance you are familiar with.

Radiators

By the term radiators we refer to stoves that additionally offer the ability to heat water. They have dual functionality, since they heat the space while at the same time they can be connected to the radiator system, transferring part of the heat produced to the water that circulates through the radiators.

This means that, with the help of the installed piping and a circulator pump, the stove can be connected to the radiator heating bodies already installed and heat the whole house. This also applies to both wood stoves and pellet stoves.

Air Ducts

Pellet stoves with air ducts offer the ability for the stove to deliver heat through the air in the installation space as well (not only through radiation) without the use of a fan. In other words, they can transfer warmth throughout the house, provided they are connected to the appropriate existing piping in the building, and offer a uniform temperature.

They owe their name to the extraction of warm air through suitable air ducts. The aforementioned air ducts can be integrated into the stove or placed in adjacent rooms, where they deliver heating to the space.

Kitchen

Kitchen stoves, as is obvious from their name, have dual functionality since they heat the space while at the same time they can also be used as regular stoves. For this reason, they are installed mainly in the kitchen area.

Wood-burning stove with fireplace

This type belongs to the category of wood-burning stoves and essentially features a front surface with a large glass panel, so as to give the feeling of a fireplace.

It should be noted that each stove can belong to more than one category. For example, there are stoves that have functionality like the one described in the "Kitchen" category, while at the same time they can provide thermal energy to the radiator water like the stoves in the "Radiator" category.

Power Selection (kW)

In order for the stove to meet the heating needs of the space in the most efficient way, we must carefully choose its power. The term power refers to the thermal energy that the stove can deliver to the space per unit of time. Power is measured in kW. Calculating the power that the stove should have is a complex process that requires scientific analysis, as we must take into account a multitude of parameters.

Below are some of the most important:

• The volume of the space we want to heat
• The building materials (presence of insulation/aluminum frames)
• The floor on which the space in question is located (penthouse or intermediate floor)
• The orientation of the space

Because the scientific processing of the aforementioned data is quite complex, a empirical rule is provided below to help us estimate, by approximation, the kW that the stove we will purchase should support.

                                                               Empirical Rule: 5 kW per 10 m²

The purpose of the above empirical rule is to avoid purchasing a stove that is excessively small or large (in terms of kW).

Tip: If the stove is particularly large, the space will be excessively heated, resulting in either having to open a window or door, or reducing the fuel quantity in the stove.

In the first case, additional fuel will be consumed without benefit.

In the second case, the stove will not have the expected performance, the flame will be weakened, more smoke will be produced than during normal operation, and the humidity in the chamber will be increased, causing the stove glass to fog up faster.

Tip: If the stove is particularly small, in order to heat the space adequately, it will be necessary for the stove to operate with fuel overfeeding, which can overheat and damage both the stove and the flue gas system.

Performance

The appropriate power of the stove should be examined in combination with its performance, as on the one hand the stove should release the desired thermal energy into the space, and on the other hand this should be combined with high efficiency. By efficiency, we refer to the ratio of the energy delivered to the space to the energy contained in the fuel used by the stove.

Tip: Among two stoves of the same power that deliver the same thermal energy to the space at the time of comparison, the stove with higher efficiency consumes less fuel and therefore is more economical.

Construction material

When looking for our future stove, we may wonder about its construction material. The majority of both types of stoves are made either of cast iron or steel. The difference is that while pellet stoves are mostly made of cast iron or steel, wood-burning stoves, in addition to the two above, also have as options ceramic and stone.

Cast iron as a material takes longer to heat up, but retains its temperature for a longer period of time. The same property is also found in the ceramic and stone claddings that some wood-burning stoves have. In contrast, steel heats up in a shorter time but also cools down faster.

Tip: The above differences between the two materials are not recommended to concern us greatly, because modern stoves, due to advanced technology, do not differ significantly in their performance depending on the material they are made of.

Certifications

Stoves can have various certifications. Below are some of the most common:

CE/ EN 14785 Certification

Stoves with the CE/ EN 14785 marking comply with the European Union standard 14785. This standard relates to specifications concerning the design, construction, safety, performance, and control of stoves that are powered by a Pellet mechanism and have a power output of up to 50kW. These stoves may have an internal or external hopper for pellet storage and always operate with the door closed.

CE/ EN 13240 Certification

Stoves with the CE/ EN 13240 marking comply with the European Union standard 13240. This standard relates to specifications concerning the design, construction, safety, performance, and control of heating devices that are manually fed with solid fuels. This specific standard does not cover devices equipped with fans to assist combustion.

EPA Certification

The EPA certification is issued by the Environmental Protection Agency of the United States and pertains to the allowable emission limits that wood stoves must meet. Therefore, wood stoves that are EPA certified are proven to be a more environmentally friendly option. It should be emphasized that Pellet stoves do not receive such certification because, by their nature (as previously mentioned), they exhibit much more environmentally friendly behavior.

Additional Features & Characteristics

Thermostat

The presence of a thermostat keeps the temperature stable in the room while also saving fuel.

Automatic Glass Cleaning Mechanism

This mechanism helps the glass stay clean for a longer period, allowing for continuous viewing of the flame during burning.

Ash Collection Container

A large ash collection container that can be easily removed and repositioned facilitates the regular maintenance of the stove.

Catalyst

Some stove models are equipped with a catalyst to achieve cleaner combustion, meaning combustion combined with lower pollutant emissions. It should be noted that, like all catalysts, stove catalysts are subject to wear and require replacement according to the manufacturer's specifications.

Want more suggestions for heating without electricity? Read our article about the best gas stoves!

Sources: epa.gov en-standard.eu en-standard.eu