Renovation of an old house: how to choose a heating system suitable for heritage

Choosing a heating system for an old house requires careful consideration, not only because of the technical aspects but also taking into account the heritage that the building represents. Renovating this type of home presents a particular challenge, combining modern comfort with respect for the architecture of the past. In this article, I will guide you through the various heating options. We will examine ecological, economical, and suitable options for different types of old houses to help you make the best choice.

Understanding the specificities of an old house

Before diving into the available heating systems, it is essential to understand what the term "old house" entails. These homes, often steeped in history, exhibit characteristics that influence their heating needs.

• Thick walls: They offer significant thermal inertia, which can be advantageous in winter.

• Poor insulation: Many old houses lack modern insulation, leading to heat losses.

• Old windows: Often single-glazed, they do not guarantee good thermal sealing.

• Humidity problems: Weak insulation and outdated ventilation can lead to moisture issues, harmful to the structure.

These elements often require special attention when selecting a heating system. How to approach this choice? The first step is often a thermal diagnosis, which identifies areas to improve, particularly insulation.

The different heating systems to consider

Now, let's look at the heating solutions suitable for old houses. Each comes with advantages and disadvantages, which should be assessed based on the specific characteristics of your home.

Oil heating: to be avoided at all costs

Although effective, oil heating represents an outdated and polluting method. Due to rising prices and efforts to reduce CO2 emissions, its installation has been banned since 2022. If your house is still equipped with an oil boiler, it is imperative to replace it with a more environmentally friendly system. Alternative options, such as high-performance gas boilers, pellet boilers, or heat pumps, are now available.

Heat pump: a versatile solution

The heat pump (HP) easily ranks at the top of modern solutions. This device, by extracting heat from the ambient air, generates a gentle and pleasant warmth within your home.

• Economical: Using very little electricity, it is also environmentally friendly.

• Renewable: It allows for air conditioning spaces in summer thanks to its reversible operation.

• Adaptable: Suitable for various volumes and types of dwellings.

Its only disadvantage in cold regions is the need for supplementary heating, to be combined wisely with a wood stove or gas radiator. Regarding this, brands like Atlantic and Saunier Duval offer quality equipment that deserves consideration.

Wood heating: an economical and ecological option

Using wood heating restores a respectful relationship with the environment. Wood is a renewable resource, and when burned, it emits only the CO2 that the tree captured during its growth. Today, pellet boilers are highly efficient and come with automatic feeding, making their use even more convenient.

Advantages of wood heating

• Cost-effective: Wood is one of the cheapest energy sources available on the market.

• Financial aid: Several subsidies are available for the installation of wood boilers.

It is also possible to connect a wood stove to an existing central heating network, which is ideal during a renovation.

Gas boiler: performance at the rendezvous

Gas boilers, especially condensing models like those from De Dietrich or Viessmann, display high energy efficiency. They ensure optimal operation while reducing fuel consumption and pollutant emissions.

When the house is already equipped with a gas central heating system, replacing it with a high-performance boiler can be wise. Unfortunately, aids for this type of installation are gradually disappearing.

Electric heating: an option to consider with caution

Electric heating may be suitable for small old houses, especially if the insulation is excellent. However, it should be avoided in larger spaces, as this method can quickly become energy-intensive.

Recommendations:

• Choose electric radiators with inertia, which ensure homogeneous heat distribution.

• Equip yourself with an intelligent regulation system to optimize consumption.

Adopt an integrated approach for heating your old house

The choice of a heating system cannot be made without considering your entire habitat. Here are the essential steps to follow:

1. Assess insulation: Before investing in a heating system, ensure that the insulation of the house meets modern standards.

2. Diagnose thermal needs: Conducting a thermal diagnosis helps determine heat losses.

3. Choose a heating system: After identifying the needs and the situation of your home, select a heating mode that is suitable for your characteristics.

4. Plan the work: Integrate energy renovations into an overall project.

The choice is vast, but it is crucial to prioritize renewable energies and find a balance between economy and performance.

Summary table of heating methods for old houses

FAQ on choosing heating for an old house

1. What heating method is best for an old house?

   The best choice depends on many factors, including insulation, location, and budget. Generally, ecological solutions such as heat pumps or wood heating are preferred.

2. Is it necessary to insulate my house before installing a new heating system?

   Yes, to maximize energy efficiency, it is essential to ensure that the insulation is adequate before installing a heating system.

3. What financial aids are available for heating renovation?

   There are several aids for ecological transition, including MaPrimeRénov' and subsidies for the purchase of eco-friendly heating equipment.

4. Are gas boilers still a good option?

   Although they are effective, gas boilers should be considered with caution, as aids are gradually disappearing and moving towards more sustainable solutions.

5. What is the cost of a heat pump for an old house?

   The cost can range from 8,000 to 15,000 euros depending on the type of HP chosen and the complexity of the installation, but aids can reduce this amount.