Underfloor heating with a fireplace - everything you need to know

If you're interested in how underfloor heating works in conjunction with a fireplace, read the article below. You'll find useful information such as whether a fireplace with a water jacket and underfloor heating can heat the entire house. We'll also answer whether it's worth opting for just underfloor heating or combining it with radiators when the heat source is a fireplace. The article will also cover what materials, devices, and parts are needed to implement underfloor heating and which fireplace to choose when implementing underfloor heating in your home. Enjoy reading.

Will a Fireplace with a Water Jacket and Underfloor Heating Heat the House?

Yes, a fireplace with a water jacket and underfloor heating is an effective way to heat the entire house. However, it's important to remember that according to Polish law, a fireplace should not be the only source of heat in a residential building. Therefore, it's advisable to use a hybrid solution - install a fireplace and add to it some other heat source - such as electric radiators or infrared heaters. It can basically be any heating device approved for use.

Is It Worth Adding Radiators to Underfloor Heating When the Heat Source Is a Fireplace?

As mentioned in the previous paragraph, the only correct solution from the perspective of Polish law is hybrid heating combining a fireplace with an additional heat source (e.g., a heat pump, gas boiler, pellet boiler, electric heating, etc.). However, the installation of radiators won't be necessary. If we decide on a fireplace as the main or additional heat source for our underfloor heating - we can also base the heating of the entire house on underfloor heating.

Underfloor heating with a fireplace as a heat source allows for energy savings and increased heat generation efficiency, which has a positive impact on both the environment and our wallets. Underfloor heating is an excellent solution because it allows for even distribution of heat in rooms, resulting in energy savings.

However, it's important to remember that this solution has a high inertia, so adding radiators or infrared heaters will eliminate the problem of slow heating and cooling of rooms, which will be crucial in emergency situations - when the daily temperature amplitude significantly exceeds average values over a given period and our building undergoes significant cooling.

By using this heating method, we can significantly reduce the costs associated with heating the house while having full control over the room temperature. Therefore - especially in older buildings - it's worth considering the use of hybrid heating with underfloor heating and a fireplace as a heat source combined with traditional radiators to enjoy both savings and high thermal comfort in our home.

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What Is Needed to Implement Underfloor Heating with a Fireplace?

To implement underfloor heating with a fireplace, various devices, materials, and parts are needed to ensure the effective operation of this system. One of the most important elements is a underfloor heating manifold, which ensures uniform distribution of heat throughout the floor. Pipes for underfloor heating are also essential because hot water flows through them, heating the floor. To ensure high efficiency of the entire installation, it's also important to provide adequate floor insulation, which minimizes heat loss to the ground.

To implement underfloor heating with a fireplace, control elements such as thermostats, which allow temperature regulation in individual rooms and ensure comfortable use of the underfloor heating system, will also be necessary. Another key device is a heat exchanger, which enables safe connection of a fireplace operating in an open circuit with a boiler operating in a closed circuit.

It's absolutely not recommended to install underfloor heating as part of an open circuit, as this solution is less healthy for the installation itself and over the years generates a greater risk of scale deposits in the system. This significantly reduces the efficiency of any heating, but with underfloor heating based on thin tubes, it's definitely not recommended. Therefore, it should definitively work in a closed circuit and be separated from the open circuit by a properly selected plate heat exchanger. Let's remind ourselves that the correct selection of the size of the plate heat exchanger for the fireplace is paramount here.

The fireplace itself is, of course, a key element, serving as a heat source and heating the water, which is then used by the underfloor heating to heat the rooms. It should also be adequately sized, i.e., have an appropriate power of the water jacket (in kW) in relation to the building's demand. Circulating pumps are responsible for driving water flow in the underfloor heating system to ensure even heating of the entire house.

By combining all these elements and calibrating them correctly, the implementation of an effectively working underfloor heating with a fireplace is possible. This innovative solution not only provides effective and even heating but also an aesthetic interior look and comfort of use on cold days.

What Fireplace to Choose for Underfloor Heating?

When opting for underfloor heating, it's also important to choose the right fireplace, which will be the basis of the entire system. The choice of the right fireplace depends on several factors. Firstly, it's important to properly match the fireplace power to the building in which it's to be installed. It's worth consulting with professionals who will advise us on the best solution. Often, a power of 8 kW per 100 m2 of the building is sufficient, but it may look definitely different in older buildings. Secondly, it's also important for the fireplace to be energy-efficient, especially given the constant uncertainty about fuel prices, including firewood. We can choose a fireplace for wood, pellets, or liquid fuel, depending on our preferences. Therefore, before making the final choice, it's worth exploring various options and consulting with experts to make sure we've made the right decision.

Investing in Comfort - Underfloor Heating with a Fireplace Step by Step

If you're wondering how to implement underfloor heating with a fireplace, read on. The first step, if we don't already have a heat source, is to choose a fireplace suitable for our building (power adequate to the area, state of the installation, and insulation level). Then, insulate the floor and install underfloor heating elements, such as underfloor heating pipes, underfloor heating manifold, controllers, and circulation pump.

Next, a concrete or anhydrite screed is applied to the pipes, creating a solid structure of the heating system. Finally, it's also important to use appropriate flooring through which heat will be emitted. Thanks to this heating system, the floor will be pleasant to the touch, and the heat will be evenly distributed in the room. Investing in underfloor heating with a fireplace is added value to our home, providing not only comfort but also energy savings.